S-8340/8341 Series
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM
SWITCHABLE SWITCHING REGULATOR CONTROLLER
www.ablicinc.com
N
Rev.4.0_02
DE
SI
G
© ABLIC Inc., 1999-2010
NE
W
The S-8340/8341 Series is a CMOS step-up switching regulator controller which mainly consists of a reference voltage
source, oscillation circuit, error amplifier, phase compensation circuit, PWM control circuit (S-8340 Series), and PWM/PFM
switching control circuit (S-8341 Series).
Since the oscillation frequency is a high 300 kHz or 600 kHz, with the addition of a small external part, the S-8340/8341
Series functions as a highly efficient step-up switching regulator with a high output current. The speed of the output stage is
enhanced so that the N-channel power MOS with a low on-resistance can be switched quickly.
The S-8340 Series realizes low ripple, high efficiency, and excellent transient characteristics thanks to a PMW control circuit
capable of varying the duty ratio linearly from 0 to 82%, optimized error amplifier, and phase compensation circuit.
The S-8341 Series contains a PWM/PFM switching control circuit so that it operates using PWM control with a duty ratio of
27% or higher and using PFM control with a duty ratio of lower than 27% to ensure high efficiency in all load ranges.
These S-8340/8341 Series serve as ideal main power supply units for portable devices when coupled with the 8-Pin TSSOP
package and high oscillation frequencies.
FO
D
DE
Oscillation frequency :
600 kHz (A and B types), 300 kHz (C and D types).
Output voltage :
Selectable in 0.1 V steps between 2.5 to 6.0 V (output voltage fixed output type)
Output voltage accuracy : 2.0%
Output voltage external setting (FB) type available. FB terminal voltage (VFB) 1.0 V
External parts :
Coil, diode, capacitors (3), transistor, and resistor only
Duty ratio :
0 to 82% (typ.) PWM control (S-8340 Series)
27 to 82% (typ.) PWM/PFM switching control (S-8341 Series A and B types)
21 to 82% (typ.) PWM/PFM switching control (S-8341 Series C and D types)
Low-voltage operation:
Oscillation guaranteed to start when VDD 0.9 V
Built-in current limit circuit: Can be set with an external resistor (RSENSE)
Soft-start function set by an external capacitor (CSS)
Shutdown function
Lead-free, Sn 100%, halogen-free*1
MM
EN
R
Features
*1. Refer to “ Product Name Structure” for details.
Power supplies for portable equipments such as PDAs, electronic notebooks, and cellular phones
Power supplies for audio equipments such as portable CD players, portable MD players, and headphone stereos
Main or local power supplies for notebook PCs and peripherals
Constant voltage power supplies for cameras, VCRs, and communication devices
Package
RE
CO
Applications
NO
T
8-Pin TSSOP
1
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Block Diagrams
SD
VDD
Phase
compensation
circuit
Triangular wave
oscillation circuit
IC internal power
supply
PWM comparator
EXT
VIN
CC
Nch Power
MOS FET
R1
RS
PWM, PWM/PFM
switching control
circuit
Shutdown
circuit
VSS
Voltage/current
reference
Soft-start
circuit
CVREF
FO
CSS
CSS
ON/OFF
CL
R2
VREF =1.0 V
NE
RSENSE
R
120 mV
VOUT
W
Error amplifier
CS
SENSE
VOUT
DE
SI
G
L
N
(1) S-8340/8341 Series A and C Types (Output Voltage Fixed Output Type)
CVREF
D
Figure 1
DE
(2) S-8340/8341 Series B and D Types (Output Voltage External Setting Type)
L
MM
EN
SD
Phase
compensation
circuit
Triangular wave
oscillation circuit
PWM comparator
EXT
VIN
Nch Power
MOS FET
VOUT
VDD
IC internal power
supply
CFB
CO
RS
SENSE
NO
T
RE
RSENSE
2
FB
Error amplifier
RFB1
CL
CS
120 mV
Shutdown
circuit
PWM, PW M/PFM
switching control
circuit
Soft-start
circuit
Voltage/current
reference
CVREF
CSS
ON/OFF
RFB2
VREF =1.0 V
CSS
Figure 2
CVREF
VSS
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Product Name Structure
1. Product Name
S-834
x
x
xx
A FT – T2 – x
DE
SI
G
N
The control method, product type, and output voltage values for the S-8340/8341 Series can be selected depending on
usage. Refer to “1. Product Name” for the definition of the product name, “2. Package” regarding the package
drawings and “3. Product Name List” for the full product names.
Environmental code
U : Lead-free (Sn 100%), halogen-free
G : Lead-free (for details, please contact our sales office)
IC direction in tape specifications
*1
W
Package name (abbreviation)
FT : 8-Pin TSSOP
NE
Output voltage
25 to 60
(E.g., when the output voltage is 2.5 V, it is expressed as 25.)
FO
R
Product type
A : Output voltage fixed output type, fOSC = 600 kHz
B : Output voltage external setting type, fOSC = 600 kHz
C : Output voltage fixed output type, fOSC = 300 kHz
D : Output voltage external setting type, fOSC = 300 kHz
*1.
Package
MM
EN
2.
Refer to the tape drawing.
DE
D
Control method
0 : PWM control
1 : PWM/PFM switching control
Package Name
Environmental code = G
Environmental code = U
Drawing Code
Tape
FT008-E-C-SD
FT008-E-C-SD
Reel
FT008-E-R-SD
FT008-E-R-S1
NO
T
RE
CO
8-Pin TSSOP
Package
FT008-A-P-SD
FT008-A-P-SD
3
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
3.
Product Name List
N
(1) Output Voltage Fixed Output Type
S-8340 Series
A Type
fOSC = 600 kHz
PWM Control
Output Voltage
(V)
DE
SI
G
Table 1
S-8341 Series
A Type
fOSC = 600 kHz
PWM/PFM Switching
Control
S-8340 Series
C Type
fOSC = 300 kHz
PWM Control
S-8341 Series
C Type
fOSC = 300 kHz
PWM/PFM Switching
Control
D
(2) Output Voltage External Setting Type
FO
R
NE
W
2.5 V
S-8340A25AFT-T2-x
S-8341A25AFT-T2-x
S-8340C25AFT-T2-x
S-8341C25AFT-T2-x
3.0 V
S-8340A30AFT-T2-x
S-8341A30AFT-T2-x
S-8340C30AFT-T2-x
S-8341C30AFT-T2-x
3.3 V
S-8340A33AFT-T2-x
S-8341A33AFT-T2-x
S-8340C33AFT-T2-x
S-8341C33AFT-T2-x
3.4 V
S-8340A34AFT-T2-x
3.5 V
S-8340A35AFT-T2-x
5.0 V
S-8340A50AFT-T2-x
S-8341A50AFT-T2-x
S-8340C50AFT-T2-x
S-8341C50AFT-T2-x
5.1 V
S-8340A51AFT-T2-x
S-8341C51AFT-T2-x
5.6 V
S-8340A56AFT-T2-x
6.0 V
S-8340A60AFT-T2-x
S-8340C60AFT-T2-x
Remark 1. Contact the ABLIC Inc. marketing department for products with an output voltage other than those
specified above.
2. x: G or U
3. Please select products of environmental code = U for Sn 100%, halogen-free products.
S-8340 Series
B Type
fOSC = 600 kHz
PWM Control
S-8341 Series
B Type
fOSC = 600 kHz
PWM/PFM Switching
Control
MM
EN
Output Voltage
(V)
DE
Table 2
S-8340 Series
D Type
fOSC = 300 kHz
PWM Control
S-8341 Series
D Type
fOSC = 300 kHz
PWM/PFM Switching
Control
NO
T
RE
CO
External setting S-8340B00AFT-T2-x
S-8341B00AFT-T2-x
S-8340D00AFT-T2-x
S-8341D00AFT-T2-x
Remark 1. x: G or U
2. Please select products of environmental code = U for Sn 100%, halogen-free products.
4
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Pin Configurations
Table 3
CVREF
3
CSS
4
ON/OFF
5
VDD
6
VOUT
(FB)
7
8
EXT
SENSE
N
2
Pin Description
GND pin
Reference voltage source pass capacitor connection
pin
Soft-start capacitor connection pin
Shutdown pin
“H” : Normal operation (step-up operating)
“L” : Entire circuit stopped (step-up stopped)
IC power supply pin
Output voltage fixed output type :
Output voltage monitoring pin
[Output voltage external setting type :
Feedback pin]
External transistor connection pin
Current limit detection pin
NO
T
RE
CO
MM
EN
DE
D
FO
R
Figure 3
VSS
DE
SI
G
8
7
6
5
Symbol
1
W
1
2
3
4
Pin No.
NE
8-Pin TSSOP
Top view
5
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Absolute Maximum Ratings
Table 4
Symbol
Absolute Maximum Rating
Unit
DE
SI
G
Parameter
N
(Ta = 25C unless otherwise specified)
VDD
VSS 0.3 to VSS 12
V
VOUT pin voltage
VOUT
VSS 0.3 to VSS 12
V
FB pin voltage
VFB
VSS 0.3 to VSS 12
V
CVREF pin voltage
VCVREF
VSS 0.3 to VDD 0.3
V
CSS pin voltage
VCSS
VSS 0.3 to VDD 0.3
V
ON/OFF pin voltage
VON/OFF
VSS 0.3 to VSS 12
V
SENSE pin voltage
VSENSE
VSS 0.3 to VSS 12
V
EXT pin voltage
VEXT
VSS 0.3 to VDD 0.3
V
EXT pin current
IEXT
100
mA
Power dissipation
PD
300 (When not mounted on board)
mW
NE
W
VDD pin voltage
*1
700
Tdpr
Storage temperature
Tstg
40 to 85
C
40 to 125
C
R
Operating ambient temperature
mW
D
FO
*1. When mounted on board
[Mounted board]
(1) Board size : 114.3 mm × 76.2 mm × t1.6 mm
(2) Board name : JEDEC STANDARD51-7
When mounted on board
MM
EN
700
600
500
400
300
200
100
RE
0
(2)
CO
Power dissipation PD (mW)
800
0
50
150
100
NO
T
Ambient temperature Ta (C)
6
Figure 4
When not mounted on board
400
Power dissipation PD (mW)
(1)
DE
Caution The absolute maximum ratings are rated values exceeding which the product could suffer physical
damage. These values must therefore not be exceeded under any conditions.
300
200
100
0
0
50
100
150
Ambient temperature Ta (C)
Power Dissipation of Packages
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Electrical Characteristics
N
(1) 600 kHz, Output Voltage Fixed Type (A Type)
Table 5
Parameter
Output voltage
Symbol
*1
Conditions
Min.
VIN VOUT(S) 0.6,
IOUT VOUT(S)/50
VOUT(E)
VOUT(S)
0.98
No external parts.
The voltage is applied to VOUT.
VOUT VOUT(S) 0.95,
EXT pin open
2
350
460
630
810
180
640
810
1060
1250
300
A
A
A
A
A
2
2
2
2
2
3.0
A
2
13
17
21
23
32
42
50
56
24
30
34
37
56
69
78
85
VOUT(S)
0.5%
VOUT(S)
0.5%
mA
mA
mA
mA
mA
mA
mA
mA
VOUT(S)
1%
VOUT(S)
1%
V
1
V
1
100
ppm/C
1
510
600
690
kHz
2
73
82
89
%
2
19
27
35
%
1
90
120
150
mV
2
0.8
V
2
0.3
V
2
0.1
0.1
0.1
0.1
A
A
2
2
3.0
6.0
14.0
ms
1
3.0
8.0
14.0
ms
1
83
85
87
87
%
%
%
%
1
1
1
1
ISS1
Current consumption 2
Current consumption
at shutdown
EXT pin output current
ISS2
S-834xA25 34
S-834xA35 44
S-834xA45 54
S-834xA55 60
VOUT VOUT(S) 0.5 V, EXT pin open
ISSS
VOUT VOUT(S) 0.95, VON/OFF 0 V
IEXTH
VEXT VOUT(E) 0.2 V
IEXTL
VEXT 0.2 V
Line regulation
VOUT1
VIN VOUT(S) 0.4 to VOUT(S) 0.6
IOUT VOUT(S)/50
Load regulation
VOUT2
VIN VOUT(S) 0.6, 10 A IOUT VOUT(S)/40
Output voltage
*2
temperature coefficient
VOUT
VIN VOUT(S) 0.6, IOUT VOUT(S)/50 ,
TaVOUT Ta 40 to 85C
VOUT VOUT(S) 0.95
fOSC
Measure waveform at the EXT pin
VIN VOUT(S) 0.95
MaxDuty
Measure waveform at the EXT pin
NE
R
FO
D
DE
MM
EN
CO
VSENSE
RE
Current limit detection
voltage
ON/OFF pin input voltage VSH
NO
T
VSL
ON/OFF pin input
leakage current
Soft-start time
Efficiency
ISH
ISL
tSS
EFFI
VOUT VOUT(S) 0.95
Judge oscillation at the EXT pin or oscillation
stop at “L”
VOUT VOUT(S) 0.95
Judge oscillation at the EXT pin.
VOUT VOUT(S) 0.95
Judge oscillation stop at the EXT pin.
VOUT 6 V, VON/OFF 6 V
VOUT 6 V, VON/OFF 0 V
VIN VOUT(S) 0.6, CSS 4700
S-8340Axx
pF, IOUT VOUT(S)/50
Measure time until oscillation
occurs at the EXT pin.
VIN VOUT(S) 0.6,
IOUT VOUT(S)/50
S-8341Axx
S-834xA25 34
S-834xA35 44
S-834xA45 54
S-834xA55 60
VOUT(S)
W
VIN VOUT(E) 0.1 V, under no load
Circuit
V
Current consumption 1
PFMDuty
Measurement
0.9
VST
PWM/PFM switching
duty ratio
(S-8341 Series A type)
Unit
Oscillation start voltage
Maximum duty ratio
Max.
VIN
S-834xA25 34
S-834xA35 44
S-834xA45 54
S-834xA55 60
S-834xA25 34
S-834xA35 44
S-834xA45 54
S-834xA55 60
Typ.
VOUT(S)
1.02
6
Input voltage
Oscillation frequency
DE
SI
G
(Ta = 25C unless otherwise specified)
V
1
V
1
7
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Sumida Corporation CD54 (10 H)
Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Sanyo Electric Co., Ltd. 2SD1628G
1.0 k
2200 pF (ceramic type)
0.01 F
4700 pF
N
Coil :
Diode :
Capacitor :
Transistor :
Base resistor (Rb) :
Base capacitor (Cb) :
CVREF :
CSS :
DE
SI
G
External parts
The VDD pin is connected to the VOUT pin.
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
VOUT [mV/C] = VOUT(S) [V]
Ta
value)
coefficient)
The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is not taken from VOUT, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (3.0 ms).
NO
T
RE
CO
MM
EN
DE
D
Caution
(Set output voltage (Output voltage temperature
FO
with temperature)
VOUT
[ppm/C] 1000
Ta VOUT
R
(Change of output voltage
NE
W
*1. VOUT(S) : Set output voltage value
VOUT(E) : Actual output voltage value : Output voltage value when IOUT VOUT(S)/50 and VIN VOUT(S) 0.6.
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula.
8
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(2) 600 kHz, Output Voltage External Setting Type (B Type)
Table 6
Symbol
*1
Conditions
Min.
Typ.
Max.
Unit
DE
SI
G
Parameter
N
(Ta = 25C unless otherwise specified)
Measurement
Circuit
VOUT(E)
VIN 2.4 V, IOUT 80 mA
3.920
4.000
4.080
V
3
FB pin voltage
VFB
VIN 2.4 V, IOUT 80 mA
0.980
1.000
1.020
V
3
Input voltage
VIN
6
V
3
0.9
V
4
No external parts.
Oscillation start voltage
VST2
Current consumption 1
ISS1
VOUT 3.8 V
Current consumption 2
ISS2
VOUT
ISSS
VOUT 3.8 V, VON/OFF 0 V
IEXTH
VEXT VOUT(E) 0.2 V
IEXTL
VEXT 0.2 V
Line regulation
VOUT1
1.6 V VIN 2.4 V, IOUT 80 mA
Load regulation
VOUT2
VIN 2.4 V, 10 A IOUT 100 mA
VOUT
Output voltage
temperature coefficient
*2
TaVOUT
VIN 2.4 V, IOUT 80 mA, Ta 40 to 85°C
FO
EXT pin output current
740
A
4
180
300
A
4
3.0
A
4
19
30
mA
46
69
mA
20
40
mV
3
20
40
mV
3
100
ppm/°C
3
W
at shutdown
460
4.5 V
NE
Current consumption
The voltage is applied to VDD.
R
Output voltage
Oscillation frequency
fOSC
VOUT 3.8 V, measure waveform at the EXT pin
510
600
690
kHz
4
Maximum duty ratio
MaxDuty
VIN 3.8 V, measure waveform at the EXT pin
73
82
89
%
4
PFMDuty
VIN VOUT(E) 0.1 V, under no load
19
27
35
%
3
VSENSE
Judge oscillation at the EXT pin or oscillation
90
120
150
mV
4
50
50
nA
4
0.8
V
4
0.3
V
4
VOUT 6 V, VON/OFF 6 V
0.1
0.1
A
4
VOUT 6 V, VON/OFF 0 V
0.1
0.1
A
4
S-8340B00
3.0
6.0
14.0
ms
3
S-8341B00
3.0
8.0
14.0
ms
3
85
%
3
duty ratio
D
PWM/PFM switching
Current limit detection
voltage
VOUT 3.8 V
stop at “L”
IFB
ON/OFF pin input voltage VSH
VOUT 6 V, VFB 1.5 V
MM
EN
FB pin input current
DE
(S-8341 Series B type)
VOUT 3.8 V
Judge oscillation at the EXT pin.
VSL
VOUT 3.8 V
Judge oscillation stop at the EXT pin.
ISH
leakage current
ISL
Soft-start time
tSS
VIN 2.4 V,
CO
ON/OFF pin input
CSS 4700 pF,
IOUT 80 mA,
EFFI
occurs at the EXT pin.
VIN 2.4 V, IOUT 80 mA
NO
T
Efficiency
RE
Measure time until oscillation
9
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Sumida Corporation CD54 (10 H)
Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Sanyo Electric Co., Ltd. 2SD1628G
1.0 k
2200 pF (ceramic type)
0.01 F
4700 pF
300 k
100 k
50 pF
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
DE
SI
G
N
Coil :
Diode :
Capacitor :
Transistor :
Base resistor (Rb) :
Base capacitor (Cb) :
CVREF :
CSS :
RFB1 :
RFB2 :
CFB :
W
External parts
(Change of output voltage
(Set output
voltage value)
VOUT
[ppm/C] 1000
Ta VOUT
(Output voltage temperature
coefficient)
DE
The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is other than 4.0 V, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (3.0 ms).
NO
T
RE
CO
MM
EN
Caution
D
with temperature)
RFB1
RFB2
10
FO
VOUT [mV/C] 1
Ta
R
NE
*1. VOUT(E) : Actual output voltage value : Output voltage value when IOUT 80 mA and VIN = 2.4 V is applied.
300 k
The Typ. value (set output voltage value) is 1 +
[V]
100 k
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula. However, the
temperature change rates for RFB1 and RFB2 are assumed to be the same.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(3) 300 kHz, Output Voltage Fixed Type (C Type)
Table 7
Output voltage
Symbol
*1
Conditions
Min.
VIN VOUT(S) 0.6,
IOUT VOUT(S)/50
VOUT(E)
VOUT(S)
0.98
No external parts.
The voltage is applied to VOUT.
VOUT VOUT(S) 0.95,
EXT pin open
V
2
210
270
350
440
110
430
520
650
740
185
A
A
A
A
A
2
2
2
2
2
3.0
A
2
13
17
21
23
32
42
50
56
24
30
34
37
56
69
78
85
VOUT(S)
0.5%
VOUT(S)
0.5%
mA
mA
mA
mA
mA
mA
mA
mA
VOUT(S)
1%
VOUT(S)
1%
V
1
V
1
100
ppm/C
1
255
300
345
kHz
2
73
82
89
%
2
15
21
31
%
1
90
120
150
mV
2
0.8
V
2
0.3
V
2
0.1
0.1
0.1
0.1
A
A
2
2
6.0
14.3
28.0
ms
1
6.0
17.2
28.0
ms
1
83
85
87
87
%
%
%
%
1
1
1
1
Current consumption 1
ISS1
Current consumption 2
Current consumption
at shutdown
EXT pin output current
ISS2
S-834xC25 34
S-834xC35 44
S-834xC45 54
S-834xC55 60
VOUT VOUT(S) 0.5 V, EXT pin open
ISSS
VOUT VOUT(S) 0.95, VON/OFF 0 V
IEXTH
VEXT VOUT(E) 0.2 V
IEXTL
VEXT 0.2 V
Line regulation
VOUT1
VIN VOUT(S) 0.4 to VOUT(S) 0.6
IOUT VOUT(S)/50
Load regulation
VOUT2
VIN VOUT(S) 0.6, 10 A IOUT VOUT(S)/40
Output voltage
*2
temperature coefficient
VOUT
VIN VOUT(S) 0.6, IOUT VOUT(S)/50
TaVOUT Ta 40 to 85C
VOUT VOUT(S) 0.95
fOSC
Measure waveform at the EXT pin
VIN VOUT(S) 0.95
MaxDuty
Measure waveform at the EXT pin
VSENSE
RE
ON/OFF pin input voltage VSH
VSL
ISH
ISL
tSS
NO
T
Soft-start time
Efficiency
VIN VOUT(E) 0.1 V, under no load
VOUT VOUT(S) 0.95
Judge oscillation at the EXT pin or oscillation
stop at “L”
VOUT VOUT(S) 0.95
Judge oscillation at the EXT pin.
VOUT VOUT(S) 0.95
Judge oscillation stop at the EXT pin.
VOUT 6 V, VON/OFF 6 V
VOUT 6 V, VON/OFF 0 V
VIN VOUT(S) 0.6, CSS 4700
S-8340Cxx
pF, IOUT VOUT(S)/50 ,
EFFI
Measure time until oscillation
occurs at EXT pin.
VIN VOUT(S) 0.6,
IOUT VOUT(S)/50
S-8341Cxx
S-834xC25 34
S-834xC35 44
S-834xC45 54
S-834xC55 60
VOUT(S)
W
NE
R
FO
D
DE
MM
EN
Current limit detection
voltage
ON/OFF pin input
leakage current
CO
PFMDuty
Circuit
0.9
VST
PWM/PFM switching
duty ratio
(S-8341 Series C type)
Measurement
Oscillation start voltage
Maximum duty ratio
Unit
VIN
Oscillation frequency
Max.
VOUT(S)
1.02
6
Input voltage
S-834xC25 34
S-834xC35 44
S-834xC45 54
S-834xC55 60
S-834xC25 34
S-834xC35 44
S-834xC45 54
S-834xC55 60
Typ.
DE
SI
G
Parameter
N
(Ta = 25C unless otherwise specified)
V
1
V
1
11
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Sumida Corporation CD54 (10 H)
Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Sanyo Electric Co., Ltd. 2SD1628G
1.0 k
2200 pF (ceramic type)
0.01 F
4700 pF
N
Coil :
Diode :
Capacitor :
Transistor :
Base resistor (Rb) :
Base capacitor (Cb) :
CVREF :
CSS :
DE
SI
G
External parts
The VDD pin is connected to the VOUT pin.
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
VOUT [mV/C] = VOUT(S) [V]
Ta
value)
coefficient)
The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is not taken from VOUT, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (6.0 ms).
NO
T
RE
CO
MM
EN
DE
D
Caution
(Set output voltage (Output voltage temperature
FO
with temperature)
VOUT
[ppm/C] 1000
Ta VOUT
R
(Change of output voltage
NE
W
*1. VOUT(S) : Set output voltage value
VOUT(E) : Actual output voltage value : Output voltage value when IOUT VOUT(S)/50 and VIN VOUT(S) 0.6.
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula.
12
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(4) 300 kHz, Output Voltage External Setting Type (D Type)
Table 8
Output voltage
Symbol
*1
Conditions
Min.
Typ.
Max.
Unit
DE
SI
G
Parameter
N
(Ta = 25C unless otherwise specified)
Measurement
Circuit
VOUT(E)
VIN = 2.4 V, IOUT = 80 mA
3.920
4.000
4.080
V
3
FB pin voltage
VFB
VIN = 2.4 V, IOUT = 80 mA
0.980
1.000
1.020
V
3
Input voltage
VIN
6
V
3
0.9
V
4
255
460
A
4
110
185
A
4
3.0
A
4
No external parts.
Oscillation start voltage
VST2
Current consumption 1
ISS1
VOUT = 3.8 V
Current consumption 2
ISS2
VOUT = 4.5 V
ISSS
VOUT = 3.8 V, VON/OFF = 0 V
W
at shutdown
VEXT = VOUT(E) 0.2 V
VEXT = 0.2 V
Line regulation
VOUT1
1.6 V VIN 2.4 V, IOUT = 80 mA
Load regulation
VOUT2
VIN = 2.4 V, 10 A IOUT 100 mA
VOUT
Output voltage
temperature coefficient
*2
TaVOUT
R
IEXTH
IEXTL
EXT pin output current
19
30
mA
46
69
mA
20
40
mV
3
20
40
mV
3
100
ppm/°C
3
NE
Current consumption
The voltage is applied to VDD.
VIN = 2.4 V, IOUT = 80 mA, Ta = 40to 85°C
fOSC
VOUT = 3.8 V, Measure waveform at the EXT pin
255
300
345
kHz
4
Maximum duty ratio
MaxDuty
VIN = 3.8 V, Measure waveform at the EXT pin
73
82
89
%
4
PFMDuty
VIN = VOUT(E) 0.1 V, Under no load
15
21
31
%
3
VSENSE
Judge oscillation at the EXT pin or oscillation
90
120
150
mV
4
50
50
nA
4
0.8
V
4
0.3
V
4
VOUT = 6 V, VON/OFF = 6 V
0.1
0.1
A
4
VOUT = 6 V, VON/OFF = 0 V
0.1
0.1
A
4
S-8340D00
6.0
14.3
28.0
ms
3
S-8341D00
6.0
17.2
28.0
ms
3
85
%
3
FO
Oscillation frequency
duty ratio
D
PWM/PFM switching
Current limit detection
voltage
VOUT = 3.8 V
stop at “L”
IFB
ON/OFF pin input voltage VSH
VOUT = 6 V, VFB = 1.5 V
MM
EN
FB pin input current
DE
(S-8341 Series D type)
VOUT = 3.8 V
Judge oscillation at the EXT pin.
VSL
VOUT = 3.8 V
Judge oscillation stop at the EXT pin.
ON/OFF pin input
ISH
leakage current
ISL
Soft-start time
tSS
VIN = 2.4 V,
CO
CSS = 4700 pF,
IOUT = 80 mA,
Measure time until oscillation
EFFI
VIN = 2.4 V,
IOUT = 80 mA
NO
T
Efficiency
RE
occurs at the EXT pin.
13
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Sumida Corporation CD54 (10 H)
Matsushita Electronic Industrial Co., Ltd. MA735 (Schottky type)
Nichicon Corporation F93 (16 V, 47 F, tantalum type)
Sanyo Electric Co., Ltd. 2SD1628G
1.0 k
2200 pF (ceramic type)
0.01 F
4700 pF
300 k
100 k
50 pF
The ON/OFF pin is connected to the VOUT pin unless otherwise specified.
Connect the SENSE pin to the VSS pin.
DE
SI
G
N
Coil :
Diode :
Capacitor :
Transistor :
Base resistor (Rb) :
Base capacitor (Cb) :
CVREF :
CSS :
RFB1 :
RFB2 :
CFB :
W
External parts
(Change of output voltage
(Set output
voltage value)
VOUT
[ppm/C] 1000
Ta VOUT
(Output voltage temperature
coefficient)
DE
The S-8340/8341 Series steps up from VDD = 0.9 V. However, 2.5 V or more for VDD is recommended to
stabilize the output voltage and oscillation frequency. If VDD is taken from VIN or other power sources,
instead of VOUT, VDD should be 2.5 V or more. However, if VDD is other than 4.0 V, note that the output
voltage accuracy of 2.0% is not guaranteed due to dependency of output voltage on VDD. In particular,
accuracy of output voltage is degraded significantly when the VDD voltage is 6.0 V or more. Therefore,
do not use this IC when the VDD voltage is 6.0 V or more. If VDD of 2.5 V or more is applied, increase
power supply so that VDD becomes 2.5 V or more within the soft-start time (6.0 ms).
NO
T
RE
CO
MM
EN
Caution
D
with temperature)
RFB1
RFB2
14
FO
VOUT [mV/C] 1
Ta
R
NE
*1. VOUT(E) : Actual output voltage value : Output voltage value when IOUT 80 mA and VIN = 2.4 V is applied.
300 k
The Typ. value (set output voltage value) is 1 +
[V]
100 k
*2. The change of output voltage with temperature [mV/C] is calculated from the following formula. However, the
temperature change rates for RFB1 and RFB2 are assumed to be the same.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Measurement Circuits
SD
L
N
1.
DE
SI
G
Cb
+
CL
Rb
+
CIN
VIN
EXT
SENSE
CVREF
VDD
CSS
ON/OFF
V
NE
W
VSS
VOUT
RL
R
Figure 5
FO
2.
EXT
DE
VSS
CVREF
MM
EN
CO
3.
VDD
RE
NO
T
+
CIN
CSS ON/OFF
A
Figure 6
SD
L
VIN
VOUT
+
D
Oscilloscope
SENSE
A
Cb
CFB
RFB1
+
C
L
Rb
SENSE
VSS
EXT
FB
CVREF
CSS
VDD
RL
V
RFB2
ON/OFF
Figure 7
15
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
4.
A
N
RFB1
CFB
EXT
FB
VDD
A
VSS
CVREF
CSS ON/OFF
NO
T
RE
CO
MM
EN
DE
D
FO
R
NE
W
A
Figure 8
16
VOUT
DE
SI
G
Oscilloscope
SENSE
+
RFB2
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Operation
1. Switching Control Method
PWM Control (S-8340 Series)
N
1. 1
PWM/PFM Switching Control (S-8341 Series)
W
1. 2
DE
SI
G
The S-8340 Series is a DC-DC converter using a pulse width modulation method (PWM).
In conventional PFM DC-DC converters, pulses are skipped when the output load current is low, causing a
fluctuation in the ripple frequency of the output voltage, resulting in an increase in the ripple voltage.
The switching frequency does not change, although the pulse width changes from 0 to 82% corresponding to each
load current in the S-8340 Series. The ripple voltage generated from switching can thus be eliminated easily
through a filter. When the pulse width is 0% (when no load is applied or the input voltage is high), pulses are
skipped and the current consumption is low.
D
FO
R
NE
The S-8341 Series is a DC-DC converter that automatically switches between a pulse width modulation method
(PWM) and a pulse frequency modulation method (PFM) depending on the load current.
The S-8341 Series operates under PWM control with the pulse duty changing from 27 to 82% (A and B types) and
from 21 to 82% (C and D types) in a high output load current area.
The S-8341 Series operates under PFM control with the pulse duty fixed at 27% (A and B types) and at 21% (C and
D types) in a low load current area, and pulses are skipped according to the load current. The oscillation circuit
thus oscillates intermittently so that the resultant lower self current consumption prevents a reduction in the
efficiency at a low load current. The switching point from PWM control to PFM control depends on the external
devices (coil, diode, etc.), and input and output voltage values. The S-8341 Series is an especially highly efficient
DC-DC converter at an output load current around 1 mA.
2. Soft-Start Function
MM
EN
DE
The S-8340/8341 Series has a built-in soft-start circuit.
This circuit enables the output voltage (VOUT) to rise gradually over the specified soft-start time (tSS) to suppress the
overshooting of the output voltage and the rush current from the power supply when the power is switched on or the
ON/OFF pin is changed to “H”.
Generally, a rush current flows to an output capacitor through an inductor and a diode in the step-up circuit
immediately after the power is turned on as shown in Figure 9. Note that the soft-start function of this IC, however,
does not limit this current.
S -8 3 40 A 3 3 A F T (V IN 0 1 .9 V , R L 3 0 0 k )
CO
3 V
O u t p u t vo lta g e
(1 V /d iv )
RE
0 V
1 .5 A
R u s h cu r re n t
NO
T
(0. 5 A /d iv )
Figure 9
0 A
t (2 m s /d iv )
Waveforms of Output Voltage and Rush Current at Soft-Start
17
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Figure 10
Image of EXT Pin Waveform
DE
SI
G
N
The soft-start circuit of the S-8340/8341 Series increases the duty ratio gradually as shown in Figure 10.
The soft-start time (tSS) can be set with an external capacitor (CSS).
If fOSC 600 kHz and CSS 4700 pF, the time until the duty ratio of 50% is reached is 9.7 ms (typ.).
If VIN 2 V, the approximate time until a specific duty ratio is reached is calculated from the following formula :
If fOSC 300 kHz, tSS [ms] = CSS [pF]
W
8.336 Duty [%] + 682.45
535000
6.564 Duty [%] + 698
NE
If fOSC 600 kHz, tSS [ms] = CSS [pF]
229000
FO
R
Even if the IC reaches a certain duty at a duty ratio of 0 to 43%, there may be a delay of the output voltage (VOUT) in
reaching the specified voltage (VOUT(S)). This delay occurs due to the delay of the error amplifier reference voltage
in reaching the specified voltage (1.0 V). Note that the maximum delay time may be the value calculated when a
duty ratio is 43%.
D
3. ON/OFF Pin (Shutdown Pin)
RE
ON/OFF
CO
VDD
MM
EN
DE
The ON/OFF pin stops or starts the step-up operation.
When the ON/OFF pin is set to "L", all the internal circuits stop operating, reducing power consumption. The EXT
pin voltage becomes equal to the VSS voltage, thereby turning off the switching transistor.
The ON/OFF pin is configured as shown in Figure 11 and is not either pulled up or pulled down. So, do not use it
in a floating state. Applying 0.3 to 0.8 V to the ON/OFF pin increases current consumption. So do not apply such
voltage. When the ON/OFF pin is not used, connect it to the VDD pin. The ON/OFF pin does not have hysterisis.
VSS
NO
T
Figure 11 ON/OFF Pin Structure
18
ON/OFF Pin
CR Oscillation Circuit
Output Voltage
“H”
Operating
Set value
“L”
Stopped
VIN*1
*1. Voltage obtained by extracting the voltage drop due to DC
resistance of the inductor and the diode forward voltage from VIN.
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
4. Current Limit Circuit
NE
W
DE
SI
G
N
The current limit circuit of the S-8340/8341 Series protects the external transistors from being damaged by heat due
to an overload or magnetic saturation of coils. Inserting a SENSE resistor (RSENSE) between the external FET
source or external NPN bipolar transistor emitter and Vss and entering a connection point with a sensor resistor into
the SENSE pin enables the current limit to function. Refer to “ Standard Circuit”.
A current limiting comparator in the IC monitors the SENSE pin for reaching the current limit detection voltage
(VSENSE 120 mV (typ.)). Upon detection of the voltage, the external transistor is held off for one clock of the
oscillator so that the current flowing in the external transistor is limited. At the ON signal of the next clock, the
external transistor is turned on and the current limit detection function is resumed.
However, this current limit circuit contains a CR filter with a time constant ( = 220 ns (typ.)) between the SENSE
pin and the current limiting comparator in the IC to prevent detection errors caused by the spike voltage generated
at the SENSE pin. If the time (pulse width tON : “H” level time at the EXT pin) after the external transistor turns on
until the current limit circuit operates is short, the current value that is actually limited becomes higher than the
current limit setting value determined by VSENSE/RSENSE as a side effect. The actual limit current value (ILIMIT) is
expressed by the following equation :
ton 0.5
ILIMIT
1 e CR
RSENSE
R
VSENSE
CR in the equation is determined by the internal CR filter and varies in the range 116 to 470 ns (220 ns
(typ.).)
Caution
Therefore, this current limit function does not guarantee full protection of external parts by ILIMIT
VSENSE/RSENSE under all operating conditions. Perform a thorough evaluation using the actual
devices.
DE
D
FO
Remark
MM
EN
For example, usage when the current value that the current limit circuit actually functions to raise the current limit
set value decided by VSENSE/RSENSE that includes usage under the conditions that the input voltage become close to
the output voltage or situations when the output voltage falls due to the activation of the current limit circuit and
become close to the input voltage.
Figure 12 shows an example of the actually measured increase of the peak current flowing through the coil when
the current limit circuit functions while the input voltage is nearing the output voltage.
Figure 13 shows an example of the actually measured increase of the peak current flowing through the coil when
the output voltage drops and approaches the input voltage by increasing the output current after the current limit
circuit functions.
S-8340A50 (RSENSE 51 m)
RE
ILPEAK (A)
3
5
VSENSE / RSENSE
NO
T
1
Figure 12
1
2
S-8340A50 (VIN 3V, RSENSE 51 m)
Current limit circuit
is activated
4
2
0
Output Current (IOUT) vs. Coil Peak Current (ILPEAK)
ILPEAK (A)
4
CO
Input Voltage (VIN) vs. Coil Peak Current (ILPEAK)
Influence of CR filter
3
2
VSENSE / RSENSE
1
3
VIN (V)
4
5
ILPEAK Measured at Activation of Current Limit
(VOUT Starts to Fall)
0
0
2
1
3
IOUT (A)
Figure 13
Measuring Coil Peak Current (ILPEAK)
If the current limit circuit is not used, remove RSENSE and connect the external transistor source or the emitter and
the SENSE pin to VSS.
19
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Series Products and External Parts Selection
1. Method for Selecting Series Products
1. 1
DE
SI
G
N
The S-8340/8341 Series is classified into eight types, according to the control systems (PWM and PWM/PFM
switching), oscillation frequencies, and output voltage setting types.
The following describes the features of respective types. Select the type according to the applications.
Control Systems
1. 2
NE
W
Two different control systems are available : PWM control system (S-8340 Series) and PWM/PFM switching control
system (S-8341 Series).
For applications for which the load current greatly differs between standby and operation, if the efficiency during
standby is important, applying the PWM/PFM switching system (S-8341 Series) realizes high efficiency during
standby.
For applications for which switching noise is critical, applying the PWM control system (S-8340 Series) whereby
switching frequency does not change due to load current allows the ripple voltage to be easily eliminated by using a
filter.
Oscillation Frequencies
1. 3
Output Voltage Setting
D
FO
R
Either oscillation frequencies, 600 kHz (A and B types) or 300 kHz (C and D types), can be selected.
The A and B types whereby high operation frequency allows the L value to be reduced, so a small inductor can be
used. In addition, use of small output capacitors is effective for downsizing devices.
The C and D types, whereby lower oscillation frequency realizes smaller self-consumption current, are highly
efficient under light loads. In particular, the C type, when combined with a PWM/PFM switching control system,
drastically improves the operation efficiency when the output load current is approximately 1 mA.
MM
EN
DE
Either fixed output type (A and C types) or external setting type (B and D types) can be selected.
The A and C types, whereby output voltage can be internally set between 2.5 and 6.0 V in the 0.1 V steps, realizes
highly accurate output voltage of 2.0% with internal highly resistant and highly accurate resistors.
In the B and D types, the output voltage can be adjusted in the range 2.5 to 6.0 V by adding external resistors (RFB1
and RFB2) and a capacitor (CFB).
A temperature gradient can be provided by installing a thermistor in series to RFB1 and RFB2.
The resistance of RFB1 RFB2 must not exceed 2 M, and set the ratio of RFB1 to RFB2 so that the FB pin is at 1.0 V.
Add CFB in parallel with RFB1 to prevent unstable operation due to output oscillation.
Set CFB so that fOSC 1/(2 CFB RFB1) is 0.1 to 20 kHz (normally, 10 kHz).
CO
Example : VOUT 3.0 V, RFB1 200 k, RFB2 100 k, CFB 100 pF
NO
T
RE
The accuracy of the output voltage VOUT set with resistors RFB1 and RFB2 is affected by the absolute precision of
external resistors RFB1 and RFB2, the FB pin input current (IFB) and IC power supply voltage (VDD) as well as the
precision of the voltage at FB pin (1 V 2.0%).
When it is assumed that IFB is 0 nA, the maximum absolute value variations of external resistors RFB1 and RFB2 are
RFB1max. and RFB2max., the minimum absolute value variations of external resistors RFB1 and RFB2 are RFB1min. and
RFB2min., and the shift of the output voltage due to the dependence of voltage on VDD is V, the minimum value
(VOUT min.) and maximum value (VOUT max.) of variations of VOUT are expressed by the following formulas :
20
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
VOUT min. (1
RFB1 min.
) 0.98 V V
RFB2 max.
N
RFB1 max.
VOUT max. (1
) 102 V V
RFB2 min.
DE
SI
G
RFB1 and RFB2 must be adjusted in order to set the voltage accuracy of VOUT to the IC output voltage accuracy (VOUT
2.0) or lower. The smaller RFB1 and RFB2 are, the less VOUT is affected by the absolute value accuracy of RFB1
and RFB2. The smaller RFB1 and RFB2 are, the less VOUT is affected by IFB.
To reduce the influence due to IFB that affects variations of VOUT, the RFB2 value must be set to a value sufficiently
lower than the input impedance at the FB pin (1 V/50 nA 20 M (max.)).
Reactive current flows through RFB1 and RFB2. Unless the reactive current value is limited as low as possible with
respect to the actual load current, efficiency decreases. Therefore, RFB1 and RFB2 should be sufficiently large.
W
If the RFB1 and RFB2 values are too large (1 M or more), VOUT is subject to be affected by external
noise, therefore, thoroughly test the performance with the actual equipment.
NE
Caution
Since the accuracy of VOUT and reactive current must be traded off, they must be considered according to
application requirements.
Connect the VDD pin to the VOUT pin for both the fixed output types and external setting types
as shown in “ Standard Circuit”. In the cases when VDD requires to be applied from VIN or
other power source instead of VOUT, raise VDD to 2.5 V or higher within the soft-start time (3.0 ms:
A and B types, 6.0 ms: C and D types).
When the VDD pin is connected to the VOUT pin, VIN can be increased slowly without any
problems.
D
FO
R
Caution
MM
EN
DE
The table below provides a rough guide for selecting a product type according to the application requirements of the
application.
Choose the product that gives you the largest number of circles (O).
Table 9
A
S-8340
B
C
D
A
S-8341
B
C
D
The set output voltage is 6 V or less
Set an output voltage freely
The efficiency under light loads (approx. 1mA) is an
CO
important factor
To be operated with a medium load current (200 mA
class)
RE
To be operated with a high load current (1 A class)
It is important to have a low-ripple voltage
Downsizing of external components is important
The symbol " " denotes an indispensable condition, while the symbol "" indicates that the
corresponding series has superiority in that aspect. The symbol "" indicates particularly high
superiority.
NO
T
Remark
21
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
2. Inductor
2 IOUT (VOUT VF VIN)
R
fosc L
FO
IPK
NE
W
DE
SI
G
N
The inductance value (L value) greatly affects the maximum output current (IOUT) and the efficiency ().
As the L value is reduced gradually, the peak current (IPK) increases and IOUT increases. As the L value is made
even smaller, IOUT decreases since the efficiency degrades and the current driveability is insufficient.
As the L value is increased, the dissipation in the switching transistor due to IPK decreases, and the efficiency
reaches the maximum at a certain L value. As the L value is made even larger, the efficiency degrades since the
dissipation due to the series resistance of the inductor increases. IOUT also decreases.
In the S-8340/8341 Series, as the L value is increased, the output voltage may be unstable depending on the
conditions of the input voltage, output voltage, and load current. Select the L value after performing a thorough
valuation under actual use conditions. The guidelines for the L range are from 2.2 to 22 H for the A and B types,
and 4.7 to 47 H for the C and D types.
The recommended L value is 5 to 10 H for the A and B types, and 10 to 22 H for the C and D types.
When choosing an inductor, attention to its allowable current should be paid since the current exceeding the
allowable value will cause magnetic saturation in the inductor, leading to a marked decline in efficiency and a
breakdown of the IC due to large current.
An inductor should therefore be selected so that IPK does not surpass its allowable current. IPK is represented by
the following equations in non-continuous operation mode.
DE
D
Where fOSC is the oscillation frequency, L is the inductance value of the inductor, and VF is the forward voltage of
the diode. VF should be appropriately 0.4 V.
For example, if a power supply with the input voltage (VIN) 3 V, output voltage (VOUT) 5 V, and load current (IOUT)
30 mA is used, fOSC 600 kHz when the S-8340A50AFT is used. When 10 H is selected for the L value, IPK
155 mA from the above formula. Therefore, in this case, an inductor with a permissible current of 155 mA or
higher for the L value of 10 H should be selected.
3. Diode
4. Capacitors (CIN, CL)
MM
EN
Use an external diode that meets the following requirements :
Low forward voltage (Schottky barrier diode is recommended.)
High switching speed (50 ns max.)
The reverse-direction withstand voltage is VOUT VF or higher.
The current rating is IPK or larger.
NO
T
RE
CO
A capacitor inserted on the input side (CIN) improves the efficiency by reducing the power impedance and stabilizing
the input current. Select a CIN value according to the impedance of the power supply used. Approximately 47 to
100 F is recommended for a capacitance depending on the impedance of the power source and load current value.
For the output side capacitor (CL), select a large capacitance with low ESR (Equivalent Series Resistance) for
smoothing the ripple voltage. When the input voltage is extremely high or the load current is extremely large, the
output voltage may become unstable. In this case the unstable area will become narrow by selecting a large
capacitance for an output capacitor. A tantalum electrolyte capacitor is recommended since the unstable area
widens when a capacitor with a large ESR, such as an aluminum electrolyte capacitor, or a capacitor with a small
ESR, such as a ceramic capacitor, is chosen.
It is recommended that a capacitor of which the capacitance is 47 to 200 F and ESR is 40 to 270 m be selected.
Fully evaluate input and output capacitors under actual operating conditions, then select them.
22
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
5. External Transistors
Enhancement (N-channel) MOS FET type or bipolar (NPN) type can be used for the external transistors.
Enhancement (N-Channel) MOS FET Type
N
5. 1
5. 2
Bipolar (NPN) Type
DE
D
FO
R
NE
W
DE
SI
G
The EXT pin can directly drive an N-channel MOS FET. When an N-channel MOS FET is used, efficiency will be 2
to 3% higher than that achieved by an NPN bipolar transistor since the MOS FET switching speed is faster and
power dissipation due to the base current is avoided.
A large current may flow at power on with some MOS FETs selected. Perform thorough evaluation using the
actual devices to select. The recommended gate capacitance of the MOS FET to be used is 1200 pF or smaller.
The important parameters in selecting a MOS FET are threshold voltage, breakdown voltage between drain and
source, total gate capacitance, on-resistance, and the current rating.
The EXT pin voltage swings between VDD and VSS. If VDD is low, a MOS FET of which the threshold voltage is low
enough so that the MOS FET is completely turned on must be used. If VDD is high, the breakdown voltage
between the gate and source must be higher by at least several volts.
During the step-up operation, voltage VOUT + VF is applied between the drain and source of the MOS FET. So the
breakdown voltage between the drain and source should be higher than the VOUT + VF voltage by at least several
volts.
The total gate capacitance and the on-resistance affect the efficiency.
The larger the total gate capacitance becomes and the higher the input voltage becomes, the more the power
dissipation for charging and discharging the gate capacitance by switching operation increases, and affects the
efficiency at low load current region. If the efficiency at low load is important, select MOS FETs with a small total
gate capacitance.
In the regions where the load current is high, the efficiency is affected by power dissipation caused by the
resistance of the MOS FETs. If the efficiency under heavy load is particularly important in the application, choose
MOS FETs which have an on-resistance as low as possible. As for the current rating, select a MOS FET whose
maximum continuous drain current rating is higher than IPK.
MM
EN
Figures 16 and 17 in “ Standard Circuits (2) Using Bipolar Transistors” show sample circuit diagrams using
Sanyo Electric Co., Ltd. 2SD1628G for the bipolar transistor (NPN). The driveability for increasing the output
current by means of a bipolar transistor depend on the hFE and Rb values of that bipolar transistor.
The Rb value is given by the following equation :
VDD 0.7
Ib
0.4
IEXTH
CO
Rb=
NO
T
RE
Find the necessary base current (Ib) using the hFE value of the bipolar transistor by the equation, Ib IPK/hFE, and
select a smaller Rb value.
A small Rb value can increase the output current, but the efficiency decreases. A current may flow as the pulses or
voltage drops take place due to the wiring resistance or some other reason. Determine an optimum value through
experimentation.
In addition, if a speed-up capacitor (Cb) is inserted in parallel with the resistance (Rb) as shown in Figures 16 and
17, the switching loss will be reduced, leading to a higher efficiency.
Select a Cb value by using the following equation as a guide :
Cb
1
2 Rb fosc 0.1
However, the optimum Cb value differs depending upon the characteristics of the bipolar transistor. Select a Cb
value after performing a thorough evaluation.
23
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Standard Circuit
N
(1) Using MOS FET
SD
VDD
Phase
com pensation
circuit
Triangular w ave
oscillation circuit
IC internal power
supply
PW M comparator
EXT
V IN
CC
Nch Power
MOS FET
R1
RS
Error am plifier
PW M , PW M/PFM
sw itching control
circuit
Shutdown
circuit
R2
Soft-start
circuit
Voltage/current
reference
CVREF
CSS
C SS
FO
ON/OFF
VSS
NE
R SENSE
CL
VREF =1.0 V
R
120 mV
VO UT
W
CS
SENSE
V OUT
DE
SI
G
L
C VREF
Single ground
Output Voltage Fixed Output Type
DE
D
Figure 14
L
SD
MM
EN
Triangular w ave
oscillation circuit
Nch Power
MOS FET
C FB
CO
RE
Error am plifier
R FB1
FB
PW M, PW M/PFM
switching control
circuit
Shutdown
circuit
Voltage/current
reference
Soft-start
circuit
VSS
CVREF
CSS
ON/OFF
R FB2
VREF =1.0 V
C SS
C VREF
Single ground
Figure 15
CL
CS
120 mV
R SENSE
NO
T
IC internal pow er
supply
RS
SENSE
24
Phase
com pensation
circuit
PW M comparator
EXT
V IN
V OUT
VDD
Output Voltage External Setting Type
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
SD
NPN
Bipolar
Transistor
IC internal power
supply
PW M comparator
EXT
V IN
Phase
com pensation
circuit
Triangular w ave
oscillation circuit
Cb
CC
Rb
Error am plifier
CS
PW M, PW M/PFM
switching control
circuit
R2
W
Shutdown
circuit
VREF =1.0 V
Soft-start
circuit
VSS
Voltage/current
reference
CVREF
CSS
C SS
C VREF
FO
R
O N/O FF
CL
NE
120 mV
R SENSE
VO UT
R1
RS
SENSE
V OUT
VDD
DE
SI
G
L
N
(2) Using Bipolar Transistor
Single ground
Output Voltage Fixed Output Type
D
Figure 16
L
DE
SD
PW M comparator
NPN
Bipolar
Transistor
Rb
MM
EN
EXT
V IN
Phase
com pensation
circuit
Triangular w ave
oscillation circuit
Cb
V OUT
VDD
IC internal pow er
supply
C FB
RS
SENSE
NO
T
RE
CO
Shutdown
circuit
PW M, PW M/PFM
switching control
circuit
Figure 17
CL
VSS
CVREF
CSS
ON/OFF
R FB2
VREF =1.0 V
Voltage/current
reference
Soft-start
circuit
R FB1
FB
CS
120 mV
R SENSE
Error am plifier
C SS
C VREF
Single ground
Output Voltage External Setting Type
Caution The above connection and constant will not guarantee successful operation.
evaluation using the actual application to set the constant.
Perform thorough
25
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Precautions
NO
T
RE
CO
MM
EN
DE
D
FO
R
NE
W
DE
SI
G
N
Mount the external capacitors, diode, coil, and other peripheral parts as close to the IC as possible, and make a onepoint grounding.
Characteristic ripple voltage and spike noise occur in IC containing switching regulators. Moreover rush current flows
at the time of a power supply injection. Because these largely depend on the coil, the capacitor and impedance of
power supply used, fully check them using an actually mounted model.
Make sure that dissipation of the switching transistor especially at high temperature will not surpass the power
dissipation of the package.
To stabilize operation, use a capacitor with a low ESR as a bypass capacitor between the VDD and VSS pins of the IC,
and install and wire it with a short distance and a low impedance. Connect CVREF to the VSS pin.
The main circuit of the IC operates on the internal power supply connected to the CVREF pin. CVREF is a bypass
capacitor that stabilizes the internal power supply. Use a 0.01 to 1 F ceramic capacitor as CVREF and install and wire
it to assure a short distance and a low impedance.
Switching regulator performance varies depending on the design of PC patterns, peripheral circuits and parts.
Thoroughly evaluate the actual device when setting. When using parts other than those which are recommended,
contact the ABLIC Inc. marketing department.
Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
ABLIC Inc. claims no responsibility for any disputes arising out of or in connection with any infringement by products
including this IC of patents owned by a third party.
26
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Characteristics
1. Examples of Major Characteristics (Typical Data)
S-8340C33A (f OSC : 300 kHz)
S-8340A33A (fOSC : 600 kHz)
1000
I SS1 (A)
300
200
Ta 40°C
200
25°C
400
Ta 40°C
100
3.0
3.5
4.0
4.5
5.0
5.5
0
2.5
6.0
(2) Current Consumption 2 (ISS2) vs. Supply Voltage (VDD)
S-8340A33A (fOSC : 600 kHz)
300
85°C
Ta 40°C
3.0
3.5
4.0
5.0
5.5
6.0
4.5
5.0
5.5
V DD (V)
5.0
5.5
6.0
5.5
6.0
85°C
25°C
150
100
50
D
25°C
0
2.5
4.5
VD D (V)
R
ISS2 (A)
FO
150
6.0
DE
ISS2 (A)
200
50
4.0
250
200
100
3.5
S-8340C33A (f OSC : 300 kHz)
300
250
3.0
NE
VD D (V)
W
I SS1 (A)
400
0
2.5
85°C
500
25°C
600
DE
SI
G
600
85°C
800
N
(1) Current Consumption 1 (ISS1) vs. Supply Voltage (VDD)
Ta 40°C
0
2.5
3.0
3.5
4.0
4.5
V DD (V)
(3) Current Consumption at Shutdown (ISSS) vs. Supply Voltage (VDD)
MM
EN
S-8340A33A (f OSC : 600 kHz) / S-8340C33A (f OSC : 300 kHz)
1.0
85°C
25°C
Ta 40°C
0.6
0.4
0.2
0.0
2.5
3.0
CO
I SSS (A)
0.8
3.5
4.0
4.5
5.0
5.5
6.0
RE
VDD (V)
(4) Oscillation Frequency (fOSC) vs. Supply Voltage (VDD)
S-8340A33A (fOSC : 600 kHz)
S-8340C33A (f OSC : 300 kHz)
700
600
Ta 40°C
fOSC (kHz)
fOSC (kHz)
400
85°C
NO
T
800
25°C
500
400
2.5
3.0
3.5
4.0
4.5
VD D (V)
5.0
5.5
6.0
85°C
350
300
Ta 40°C
25°C
250
200
2.5
3.0
3.5
4.0
4.5
5.0
VD D (V)
27
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(5) EXT Pin Output Current “H” (IEXTH) vs.
Supply Voltage (VDD)
(6) EXT Pin Output Current “L” (IEXTL) vs.
Supply Voltage (VDD)
S-8340A33A (f OSC : 600 kHz ) / S-8340C33A (f OSC : 300 kHz)
S-8340A33A (f OSC : 600 kHz ) / S-8340C33A (f OSC : 300 kHz)
60
40
30
20
10
85°C
120
Ta 40°C
100
DE
SI
G
25°C
IEXTL (mA)
I EXTH (mA)
50
80
60
40
25°C
20
0
0
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
2.5
3.5
4.0
4.5
5.0
5.5
6.0
5.5
6.0
VDD (V)
S-8340A33A (f OSC : 600 kHz)
NE
(7) Soft-Start Time (tSS) vs. Supply Voltage (VDD)
S-8340C33A (fOSC : 300 kHz)
20
40
Ta 40°C
Ta 40°C
30
tSS (ms)
R
15
5
25°C
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
DE
VD D (V)
D
85°C
0
(8) ON/OFF Pin Input Voltage “H” (VSH) vs. Supply
Voltage (VDD)
MM
EN
S-8340A33A (f OSC : 600 kH z) / S-8340C 33A (f OSC : 300 kHz )
1.0
25°C
0.6
0.4
Ta 40°C
CO
0.2
0.0
2.5
3.0
3.5
4.0
4.5
10
85°C
25°C
0
2.5
3.0
3.5
4.0
4.5
5.0
VD D (V)
(9) ON/OFF Pin Input Voltage “L” (VSL) vs. Supply
Voltage (VDD)
S-8340A33A (f OSC : 600 kHz) / S-8340C33A (fOSC : 300 kHz)
1.0
85°C
0.8
20
FO
10
0.8
VSL (V)
tSS (ms)
3.0
85°C
W
VD D (V)
VSH (V)
N
140
Ta 40°C
85°C
25°C
0.6
0.4
Ta 40°C
0.2
0.0
5.0
5.5
2.5
6.0
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
RE
VDD (V)
(10) Output Voltage (VOUT) vs. Supply Voltage (VDD)
S-8340A25A (f OSC : 600 kHz) / S-8340C25A (fOSC : 300 kHz)
NO
T
2.54
25°C
3.34
85°C
3.32
2.50
VOUT (V)
VOUT (V)
2.52
2.48
2.46
Ta 40°C
2.44
2.42
25°C
85°C
3.30
3.28
3.26
3.24
Ta 40°C
3.22
2.40
3.20
2.5
3.0
3.5
4.0
4.5
VDD (V)
28
S-8340A33A (f OSC : 600 kHz ) / S-8340C33A (f OSC : 300 kHz)
5.0
5.5
6.0
2.5
3.0
3.5
4.0
4.5
VDD (V)
5.0
5.5
6.0
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
S-8340A50A (f OSC : 600 kHz) / S-8340C50A (fOSC : 300 kHz)
25°C
85°C
5.00
DE
SI
G
VOUT (V)
5.02
N
5.04
4.98
4.96
4.94
4.92
Ta 40°C
4.90
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
W
VDD (V)
S-8340A33A (fOSC : 600 kHz) / S-8340C33A (f OSC : 300 kH z)
85
0.9
84
25°C
R
MaxDuty (%)
1.0
0.8
83
85°C
FO
VST (V)
S-8340A33A (f OSC : 600 kHz) / S-8340C33A (fOSC : 300 kHz)
NE
(11) Oscillation Start Voltage (VST) vs. Temperature (Ta) (12) Maximum Duty Ratio (MaxDuty) vs. Supply Voltage
(VDD)
0.7
0.6
81
80
D
0.5
82
0.4
20
20
0
40
60
80
2.5
DE
40
Ta (°C)
Ta 40°C
79
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VD D (V)
MM
EN
(13) PWM/PFM Switching Duty Ratio (PFMDuty) vs. Supply Voltage (VDD)
S-8341A33A (f OSC : 600 kHz)
29
27
26
Ta 40°C
24
2.5
3.0
24
85°C
28
25
S-8341C33A (fOS C : 300 kHz )
3.5
4.0
4.5
PFMDuty (%)
25°C
CO
PFMDuty (%)
30
23
25°C
22
85°C
21
20
19
Ta 40°C
18
5.0
5.5
6.0
2.5
VD D (V)
3.0
3.5
4.0
4.5
5.0
5.5
6.0
RE
V D D (V)
(14) Current Limit Detection Ratio (VSENSE) vs. Supply Voltage (VDD)
S-8340A33A (f OSC : 600 kHz ) / S-8340C33A (f OSC : 300 kHz)
NO
T
135
25°C
VSENSE (mV)
130
85°C
125
120
115
Ta 40°C
110
105
2.5
3.0
3.5
4.0
4.5
5.0
5.5
6.0
VDD (V)
29
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
2. Examples of Transient Response Characteristics
(1) Power-on (Typical Data)
N
S-8340A33AFT, fOSC = 600 kHz, Ta = 25C
VIN = 0 1.98 V, IOUT = 200 mA
3V
VIN
(1 V/div)
0V
3V
VIN
(1 V/div)
0V
V OUT
(1 V/div)
3V
V OUT
(1 V/div)
3V
0V
W
0V
t (2 ms/div)
NE
t (2 ms/div)
S-8340C33AFT, fOSC = 300 kHz, Ta = 25C
VIN = 0 1.98 V, IOUT = 1 mA
I
VIN = 0 1.98 V, IOUT = 200 mA
3V
VIN
(1 V/div)
0V
FO
R
3V
VIN
(1 V/div)
0V
3V
0V
t (4 ms/div)
(2) ON/OFF Pin Response (Typical Data)
MM
EN
S-8340A33AFT, fOSC = 600 kHz, Ta = 25C
D
V OUT
(1 V/div)
3V
0V
t (4 ms/div)
DE
V OUT
(1 V/div)
VON /OFF 0 1.98 V, IOUT = 200 mA
VON/OFF 0 1.98 V, IOU T = 1 mA
3V
0V
CO
3V
VON/OFF
(1 V/div)
0V
V OUT
(1 V/div)
DE
SI
G
VIN = 0 1.98 V, IOUT = 1 mA
3V
VON/OFF
(1 V/div)
0V
V OUT
(1 V/div)
3V
0V
t (2 ms/div)
RE
t (2 ms/div)
S-8340C33AFT, fOSC = 300 kHz, Ta = 25C
NO
T
VON/OFF 0 1.98 V, IOU T = 1 mA
VON/OFF 0 1.98 V, IOU T = 200 mA
3V
VON/OFF
(1 V/div)
0V
VON/OFF
(1 V/div)
3V
3V
V OUT
(1 V/div)
0V
V OUT
(1 V/div)
3V
0V
t (4 ms/div)
30
0V
t (4 ms/div)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(3) Load Fluctuations
S-8340A33AFT, fOSC = 600 kHz
S-8340C33AFT, fOSC = 300 kHz
VIN = 1.98 V, IOUT = 100 mA 100 A
100 mA
IOUT
100 A
DE
SI
G
100 mA
IOUT
100 A
V OUT
(0.02 V/div)
VOUT
(0.02 V/div)
W
t (4 ms/div)
t (4 ms/div)
S-8340C33AFT, fOSC = 300 kHz
NE
S-8340A33AFT, fOSC = 600 kHz
VIN = 1.98 V, IOUT = 100 A 100 mA
VIN = 1.98 V, IOUT = 100 A 100 mA
100 mA
IOUT
100 A
FO
R
100 mA
IOUT
100 A
VOUT
(0.02 V/div)
(4) Input Voltage Fluctuations
MM
EN
S-8340A33AFT, fOSC = 600 kHz
VIN = 1.98 2.64 V, IOUT = 100 mA
CO
2.64 V
VIN
(0.3 V/div)
1.98 V
S-8340C33AFT, fOSC = 300 kHz
VIN = 1.98 2.64 V, IOUT = 100 mA
66
VIN 2.64 V
(0.4 V/div)
1.98 V
VOUT
(0.02 V/div)
t (0.2 ms/div)
RE
t (0.2 ms/div)
DE
t (0.2 ms/div)
D
V OUT
(0.02 V/div)
V OUT
(0.02 V/div)
N
VIN = 1.98 V, IOUT = 100 mA 100 A
S-8340A33AFT, fOSC = 600 kHz
t (0.2 ms/div)
S-8340C33AFT, fOSC = 300 kHz
VIN = 2.64 1.98 V, IOUT = 100 mA
VIN = 2.64 1.98 V, IOUT = 100 mA
VIN 2.64 V
(0.4 V/div)
1.98 V
NO
T
VIN 2.64 V
(0.3 V/div)
1.98 V
VOUT
(0.02 V/div)
VOUT
(0.02 V/div)
t (0.2 ms/div)
t (0.2 ms/div)
31
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Reference Data
DE
SI
G
N
Reference data are intended for use in selecting external parts to the IC. The information therefore provides
characteristic data in which external parts are selected with a view of wide variety of IC applications. All data shows
typical value.
1. External Parts for Reference Data
Voltage
S-8340A25AFT
2.5 V
(2)
(3)
S-8341A25AFT
(4)
(5)
S-8340A33AFT
3.3 V
(6)
(7)
S-8341A33AFT
(8)
(9)
S-8340A50AFT
5.0 V
(10)
(11)
S-8341A50AFT
(12)
Diode
Output Capacitor
Sense
Inductor
Transistor
CDRH5D18/4.1 H
NDS335N
RB491D
F920J476MB3 1
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
CDRH5D18/4.1 H
NDS335N
RB491D
CDRH124/10 H
FTS2001
RBO81L20
CDRH5D18/4.1 H
NDS335N
CDRH124/10 H
FTS2001
CDRH5D18/4.1 H
NDS335N
RB491D
F920J476MB3 1
*1
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
*2
CDRH5D18/4.1 H
NDS335N
RB491D
F951A476MF1 1
*1
*2
Resistor
0
W
Output
Name
Application
*1
*2
F920J476MB3 1
*1
F951C476MG1 2
*2
RB491D
F920J476MB3 1
*1
RBO81L-20
F951C476MG1 2
*2
NE
(1)
Product
R
No.
External Parts List for Output Current vs. Efficiency, Output Current vs. Output Voltage
Characteristics Data for A Type
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
CDRH5D18/4.1 H
NDS335N
RB491D
F951A476MF1 1
*1
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
*2
FO
Table 10
No.
(13)
External Parts List for Output Current vs. Efficiency, Output Current vs. Output Voltage
Characteristics Data for C Type
Product
Output
Name
Voltage
S-8340C25AFT
2.5 V
(14)
(15)
S-8341C25AFT
(18)
(20)
(21)
(22)
(23)
S-8340C50AFT
S-8341C50AFT
NO
T
(24)
S-8341C33AFT
3.3 V
RE
(19)
Transistor
Diode
Output Capacitor
CDRH6D28/10 H
FDN335N
RB491D
F951C476MG1 1
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
*4
CDRH6D28/10 H
FDN335N
RB491D
F951C476MG1 1
*3
5.0 V
0
Application
*3
FTS2001
RBO81L20
F951C476MG1 2
*4
RB491D
F951C476MG1 1
*3
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
*4
CDRH6D28/10 H
FDN335N
RB491D
F951C476MG1 1
*3
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
*4
CDRH6D28/10 H
FDN335N
RB491D
F951C476MG1 1
*3
CDRH6D28/10 H
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
*4
CDRH6D28/10 H
FDN335N
RB491D
F951C476MG1 1
*3
CDRH124/10 H
FTS2001
RBO81L20
F951C476MG1 2
*4
*3. CDRH6D28 + FDN335N + RB491D: For part height of 3 mm and high efficiency
*4. CDRH124 + FTS2001 + RBO81L-20: For optimizing the load current driveability
32
Resistor
FDN335N
CO
S-8340C33AFT
Sense
Inductor
CDRH124/10 H
(16)
(17)
MM
EN
Table 11
DE
D
*1. CDRH5D18 + NDS335N + RB491D: For small and thin parts of which height is 2 mm or shorter (The maximum current of
an external part should be set to 1.7 A.)
*2. CDRH124 + FTS2001 + RBO81L-20: For heavy load current (The maximum current of an external part should be set to
4.5 A.)
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Output
Name
Voltage
S-8341A25AFT
2.5 V
(26)
(27)
S-8341A33AFT
3.3 V
(28)
(29)
S-8341A50AFT
5.0 V
(30)
Diode
Output Capacitor
Sense
Inductor
Transistor
CDRH5D18/4.1 H
NDS335N
RB491D
F920J476MB3 1
CDRH124/10 H
FTS2001
RBO81L-20
F951C476MG1 2
*2
CDRH5D18/4.1 H
NDS335N
RB491D
F920J476MB3 1
*1
CDRH124/10 H
FTS2001
RBO81L-20
F951C476MG1 2
*2
CDRH5D18/4.1 H
NDS335N
RB491D
F951A476MF1 1
*1
CDRH124/10 H
FTS2001
RBO81L-20
F951C476MG1 2
*2
Resistor
Application
N
Product
No.
(25)
External Parts List for Output Current vs. PFM/PWM Switching Input Voltage Characteristics
Data for A Type
0
DE
SI
G
Table 12
*1
Output
Name
Voltage
S-8341C25AFT
2.5 V
(32)
(33)
S-8341C33AFT
3.3 V
(34)
(35)
S-8341C50AFT
5.0 V
Inductor
Transistor
CDRH6D28/10 H
FDN335N
CDRH124/10 H
FTS2001
CDRH6D28/10 H
CDRH124/10 H
CDRH6D28/10 H
CDRH124/10 H
(36)
Diode
Output Capacitor
RB491D
Sense
Resistor
Application
R
(31)
Product
F951C476MG1 1
RBO81L-20
F951C476MG1 2
*4
FDN335N
RB491D
F951C476MG1 1
*3
FTS2001
RBO81L-20
F951C476MG1 2
*4
FDN335N
RB491D
F951C476MG1 1
*3
FTS2001
RBO81L-20
F951C476MG1 2
*4
FO
No.
External Parts List for Output Current vs. PFM/PWM Switching Input Voltage Characteristics
Data for C Type
D
Table 13
NE
W
*1. CDRH5D18 + NDS335N + RB491D: For small and thin parts of which height is 2 mm or shorter (The maximum current of
an external part should be set to 1.7 A.)
*2. CDRH124 + FTS2001 + RBO81L-20: For heavy load current (The maximum current of an external part should be set to
4.5 A.)
0
*3
NO
T
RE
CO
MM
EN
DE
*3. CDRH6D28 + FDN335N + RB491D: For part heights of 3 mm and high efficiency
*4. CDRH124 + FTS2001 + RBO81L-20: For optimizing the load current driveability
33
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
External Parts List for Ripple Data
(38)
(39)
S-8341A25AFT
(40)
(41)
S-8340A33AFT
3.3 V
(42)
(43)
S-8341A33AFT
(44)
(45)
S-8340A50AFT
5.0 V
(46)
S-8341A50AFT
CDRH5D18/4.1 H
NDS335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH5D18/4.1 H
NDS335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH5D18/4.1 H
NDS335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH5D18/4.1 H
NDS335N
RB491D
CDRH124/10 H
FTS2001
CDRH5D18/4.1 H
NDS335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH5D18/4.1 H
RB491D
FTS2001
RBO81L-20
NDS335N
DE
(47)
Diode
CDRH124/10 H
(48)
Output Capacitor
RBO81L-20
N
2.5 V
Transistor
Sense
Resistor
DE
SI
G
S-8340A25AFT
Inductor
F920J476MB3 1
F920J476MB3 2
F951C476MG1 2
F951A107MG1 2
F920J476MB3 1
F920J476MB3 2
F951C476MG1 2
F951A107MG1 2
W
Voltage
F920J476MB3 1
F920J476MB3 2
NE
Output
Name
R
(37)
Product
FO
No.
External Parts for Output Current vs. Ripple Voltage Characteristics Data for A Type
D
Table 14
F951C476MG1 2
F951A107MG1 2
F920J476MB3 1
F920J476MB3 2
F951C476MG1 2
F951A107MG1 2
F951A476MF1 1
F951A476MF1 2
F951C476MG1 2
F951A107MG1 2
F951A476MF1 1
F951A476MF1 2
F951C476MG1 2
F951A107MG1 2
0
Application
*1
*2
*1
*2
*1
*2
*1
*2
*1
*2
*1
*2
NO
T
RE
CO
MM
EN
*1. CDRH5D18 + NDS335N + RB491D: For small and thin parts of which the height is 2 mm or shorter (The maximum
current of an external part should be set to 1.7 A.)
*2. CDRH124 + FTS2001 + RBO81L-20: For heavy load current (The maximum current of an external part should be set to
4.5 A.)
34
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(50)
(51)
S-8341C25AFT
(52)
(53)
S-8340C33AFT
3.3 V
(54)
(55)
S-8341C33AFT
(56)
(57)
S-8340C50AFT
5.0 V
(58)
(59)
S-8341C50AFT
Diode
CDRH6D28/10 H
FDN335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH6D28/10 H
FDN335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH6D28/10 H
FDN335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH6D28/10 H
FDN335N
RB491D
CDRH124/10 H
FTS2001
RBO81L-20
CDRH6D28/10 H
FDN335N
CDRH124/10 H
FTS2001
RBO81L-20
CDRH6D28/10 H
FDN335N
RB491D
FTS2001
RBO81L-20
CDRH124/10 H
DE
(60)
Output Capacitor
F951C476MG1 1
F951C476MG1 2
RB491D
Sense
Resistor
F951C476MG1 2
F951A107MG1 2
F951C476MG1 1
F951C476MG1 2
F951C476MG1 2
F951A107MG1 2
F951C476MG1 1
F951C476MG1 2
F951C476MG1 2
F951A107MG1 2
F951C476MG1 1
F951C476MG1 2
F951C476MG1 2
F951A107MG1 2
F951C476MG1 1
F951C476MG1 2
F951C476MG1 2
F951A107MG1 2
F951C476MG1 1
F951C476MG1 2
F951C476MG1 2
F951A107MG1 2
Application
N
2.5 V
Transistor
0
DE
SI
G
S-8340C25AFT
Inductor
W
Voltage
NE
Output
Name
R
(49)
Product
FO
No.
External Parts for Output Current vs. Ripple Voltage Characteristics Data for C Type
D
Table 15
*3
*4
*3
*4
*3
*4
*3
*4
*3
*4
*3
*4
NO
T
RE
CO
MM
EN
*3. CDRH6D28 + FDN335N + RB491D: For part heights of 3 mm and high efficiency
*4. CDRH124 + FTS2001 + RBO81L-20: For optimizing the load current driveability
35
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
Performance Data for Parts
Manufacturer
L
4.1 H
0.042 typ.
0.057 max.
CDRH124
10 H
0.028 max.
CDRH6D28
10 H
0.048 typ.
0.065 max.
Rohm
Corporation
RB491D
Diode
1.95 A
4.5 A
1.70 A
Diameter
5.7 mm
typ.
6.0 mm
max.
12. 0 mm
typ.
12.3 mm
max.
6.7 mm
typ.
7.0 mm
max.
Height
1.8 mm
typ.
2.0 mm
max.
4.5 mm
max.
3.0 mm
max.
Forward current 1.0 A @VF = 0.45 V, Vrm 25 V
R
Sumida
Corporation
CDRH5D18
Performance
Max. Current
Forward current 5.0 A @VF = 0.45 V, Vrm 25 V
RB081L20
FO
Inductor
DC resistance
W
Product Name
NE
Component
Performance of External Parts
DE
SI
G
Table 16
N
The following shows the performance of external parts.
47 F, 16 V, 5.5 4.8 2.3 mm max.,
ESR = 0.08 (nominal value)
47 F, 10 V, 5.5 4.8 2.0 mm max.,
F951A476MF1
ESR = 0.1 (nominal value)
47 F, 6.3 V, 3.6 3 1.2 mm max.,
F920J476MB3
ESR = 0.27 (nominal value)
100 F, 10 V, 5.5 4.8 2.3 mm max.,
F951A107MG1
ESR = 0.08 (nominal value)
VDSS = 20 V max., VGSS = 8 V max., ID = 1.7 A max.,
External
Fairchild
transistor
Vth = 0.5 V to 1 V, Ciss = 240 pF typ.,
Semiconductor
NDS335N*1
(N-channel
Corporation
RDS(ON) = 0.14 max.(VGS = 2.7 V), SOT-23-3 package or
FET)
equivalent
VDSS = 20 V max., VGSS = 8 V max., ID = 1.7 A max.,
Vth = 0.4 V to 1.5 V, Ciss = 310 pF typ.,
FDN335N
RDS(ON) = 0.10 max.(VGS = 2.5 V), SOT-23-3 package or
equivalent
VDSS = 20 V max., VGSS = 8 V max., ID = 5 A max.,
Sanyo Electric
FTS2001
Vth = 0.4 V to 1.3 V, Ciss = 750 pF typ.,
Co., Ltd.
RDS(ON) = 0.046 max.(VGS = 2.5 V), 8-Pin TSSOP package
*1. The manufacturer recommends the FDN335N as an alternative for the NDS335N.
Nichicon
Corporation
DE
D
F951C476MG1
The value of each characteristic in Table 16 depends on the materials prepared by each manufacturer,
however, confirm the specifications by referring to respective materials when using any of the above.
NO
T
Caution
RE
CO
MM
EN
Capacitor
(output
capacitance)
(tantalum
electrolytic
capacitor)
36
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
2. Output Current (IOUT) vs. Efficiency () Characteristics
The following shows the actual output current (IOUT) vs. efficiency () characteristics when the S-8340/8341 Series is
used under conditions (1) to (24) in Tables 10 and 11.
0.1
1
10
IOUT(mA)
(mA)
IOUT
1.5V
100
10
IOUT(mA)
(mA)
IOUT
CO
=1.2V
VINVI N1.2
V
1
10
IOUT
IOUT(mA)
(mA)
1.8V
100
0.1
N
10000
100
90
80
70
60
50
40
30
20
η(%)
(%)
NO
T
3.0V
VVI N=1.2V
IN 1.2 V
10
IOUT(mA)
(mA)
IOUT
10
100
IIOUT
(mA)
OUT (mA)
1000
10000
1000
10000
1000
10000
3.0V
VI N=1.5V
VIN
1.5 V
1.8V
1
10
100
IOUT (mA)
(mA)
(8) S-8341A33AFT
1.8V
1
1
1.8V
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
0.1
(CDRH5D18/4.1
H, NDS335N)
(CDRH5D18/4.1
H,NDS335N)
60
50
40
30
20
VINVIN=1.5V
1.5 V
(6) S-8340A33AFT
1000
(7) S-8341A33AFT
η(%)
(%)
1000
2.4V
60
50
40
30
20
1000
MM
EN
100
3.0V
0.1
10
100
(mA)
IOUT (mA)
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
R
D
1.5V
(CDRH5D18/4.1
NDS335N)
H,
(CDRH5D18/4.1 H,
NDS335N)
0.1
100
90
80
70
100
90
80
70
DE
1
RE
η(%)
(%)
η（%)
(%)
VVINI N
1.2 V
=1.2V
60
50
40
30
20
1
FO
1.8V
(5) S-8340A33AFT
100
90
80
70
V
1.5 V
VIN
I N=1.5V
0.1
(CDRH5D18/4.1
NDS335N)
H,
(CDRH5D18/4.1
H,
NDS335N)
0.1
1.8V
(4) S-8341A25AFT
η(%)
(%)
100
90
80
70
60
50
40
30
20
2.4V
60
50
40
30
20
1000
(3) S-8341A25AFT
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
DE
SI
G
VIN
1.2 V
I N=1.2V
η(%)
(%)
1.8V
100
90
80
70
W
(CDRH5D18/4.1
NDS335N)
H,
(CDRH5D18/4.1 H,
NDS335N)
η(%)
(%)
η(%)
(%)
100
90
80
70
60
50
40
30
20
(2) S-8340A25AFT
NE
(1) S-8340A25AFT
100
1000
100
90
80
70
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
3.0V
1.8V
60
50
40
30
20
VVINI N=1.5V
1.5 V
0.1
1
10
100
(mA)
IOUT (mA)
37
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
4.5V
3.0V
60
50
40
30
20
VIN
V
1.8 V
I N=1.8V
10
100
IOUT
(mA)
IOUT
(mA)
10
100
IOUT
(mA)
IOUT
(mA)
1000
10000
70
60
50
40
30
20
(CDRH124/10
H, FTS2001)
(CDRH124/10
H,FTS2001)
4.5V
3.0V
R
3.0V
η(%)
(%)
70
60
50
40
30
20
VVINI N=1.8V
1.8 V
FO
VVINI N=1.8V
1.8 V
10
IOUT(mA)
(mA)
IOUT
100
1000
MM
EN
1.8V
1
10
IIOUT
(mA)
OUT (mA)
RE
(15) S-8341C25AFT
CO
V
1.2 V
VIN
I N=1.2V
0.1
1.5V
100
100
90
80
70
1000
0.1
1
1000
10000
1.8V
VIINN=1.5V
1.5 V
1
10
100
1000
10000
(16) S-8341C25AFT
100
90
80
70
VVINI N=1.2V
1.2 V
10
2.4V
IOUT (mA)
(mA)
1.8V
IIOUT
(mA)
OUT (mA)
(CDRH124/10
FTS2001)
(CDRH124/10
H,H,
FTS2001)
0.1
η(%)
(%)
NO
T
60
50
40
30
20
10
100
IIOUT
(mA)
OUT (mA)
60
50
40
30
20
(CDRH6D28/10
H, FDN335N)
(CDRH6D28/10
H,FDN335N)
100
90
80
70
1
(14) S-8340C25AFT
100
90
80
70
60
50
40
30
20
0.1
D
1
DE
η(%)
(%)
100
90
80
4.5V
(CDRH6D28/10
FDN335N)
(CDRH6D28/10
H,H,
FDN335N)
η(%)
(%)
1
(12) S-8341A50AFT
(13) S-8340C25AFT
38
=1.8V
VVINI N
1.8 V
0.1
(CDRH5D18/4.1
H,NDS335N)
(CDRH5D18/4.1
H, NDS335N)
0.1
η(%)
(%)
50
40
30
20
1000
(11) S-8341A50AFT
100
90
80
3.0V
70
60
W
1
4.5V
NE
0.1
(CDRH124/10
FTS2001)
(CDRH124/10
H,H,
FTS2001)
N
100
90
80
DE
SI
G
(CDRH5D18/4.1
H, NDS335N)
(CDRH5D18/4.1
H,NDS335N)
η(%)
(%)
100
90
80
70
(10) S-8340A50AFT
η(%)
(%)
η(%)
(%)
(9) S-8340A50AFT
1.5V
100
1000
(CDRH124/10
H, FTS2001)
(CDRH124/10
H,FTS2001)
2.4V
1.8V
60
50
40
30
20
V
1.5 V
VIN
I N=1.5V
0.1
1
10
100
IIOUT
(mA)
OUT (mA)
1000
10000
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(18) S-8340C33AFT
100
90
80
70
60
50
40
30
20
3.0V
V
1.2 V
VIN
I N=1.2V
1
10
100
IOUT
(mA)
OUT (mA)
1000
10
100
IIOUT
(mA)
OUT (mA)
3.0V
1.8V
R
η(%)
(%)
VVINI N=1.8V
1.8 V
VVINI N=1.5V
1.5 V
0.1
1
10
100
1000
10000
IOUT
IOUT(mA)
(mA)
10
100
(mA)
IIOUT
OUT(mA)
(CDRH124/10 H, FTS2001)
(CDRH124/10 H,FTS2001)
4.5V
3.0V
60
50
40
30
20
=1.8V
VVINI N
1.8 V
0.1
1
10
100
1000
10000
IOUT(mA)
(mA)
IOUT
RE
(24) S-8341C50AFT
I N=1.8V
VINV
1.8 V
100
η(%)
(%)
4.5V
10
IIOUT
(mA)
OUT (mA)
100
90
80
70
1000
(CDRH6D28/10 H, FDN335N)
(CDRH6D28/10 H, FDN335N)
1
10000
FO
3.0V
NO
T
η(%)
(%)
MM
EN
4.5V
CO
η(%)
(%)
(CDRH6D28/10 H, FDN335N)
0.1
1000
(22) S-8340C50AFT
(CDRH6D28/10H, FDN335N)
100
90
80
70
60
50
40
30
20
1000
η(%)
(%)
(21) S-8340C50AFT
(23) S-8341C50AFT
100
(CDRH124/10 H, FTS2001)
60
50
40
30
20
D
1
1.8V
DE
η(%)
(%)
V
1.2 V
VINI N=1.2V
1
10
(CDRH124/10 H, FTS2001)
100
90
80
70
3.0V
0.1
1
(20) S-8341C33AFT
(CDRH6D28/10H, FDN335N)
100
90
80
70
60
50
40
30
20
VVINI N=1.5V
1.5 V
0.1
(CDRH6D28/10 H, FDN335N)
0.1
1.8V
IOUT (mA)
(mA)
(19) S-8341C33AFT
100
90
80
70
60
50
40
30
20
3.0V
W
0.1
1.8V
(CDRH124/10H, FTS2001)
(CDRH124/10 H, FTS2001)
N
(CDRH6D28/10 H, FDNS335N)
NE
100
90
80
70
60
50
40
30
20
η(%)
(%)
η(%)
(%)
(CDRH6D28/10H, FDN335N)
DE
SI
G
(17) S-8340C33AFT
3.0V
1000
100
90
80
70
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
4.5V
3.0V
60
50
40
30
20
VVINI N=1.8V
1.8 V
0.1
1
10
100
IOUT (mA)
(mA)
1000
10000
39
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
3. Output Current (IOUT) vs. Output Voltage (VOUT) Characteristics
The following shows the actual output current (IOUT) vs. output voltage (VOUT) characteristics when the S-8340/8341
Series is used under conditions (1) to (24) in Tables 10 and 11.
2.62
2.52
2.50
1
10
100
1000
0.1
1
10
IOUT
IOUT(mA)
(mA)
RE
3.25
3.20
3.60
(V)
V
3.35
3.30
VOUT (V)
3.45
3.40
40
1.8V
VV
1.5 V
N=1.5V
INI
3.0V
1
10
100
IOUT
(mA)
OUT (mA)
1000
10000
(8) S-8341A33AFT
3.60
100
(V)
3.45
3.40
3.35
3.30
VOUT (V)
1.8V
V
VVINI N=1.2V
1.2 V
10
IOUT
(mA)
IOUT
(mA)
1000
(CDRH124/10
H, FTS2001)
(CDRH124/10
H,FTS2001)
0.1
1000
(CDRH124/10
FTS2001)
(CDRH124/10
H,
FTS2001)
H,
1.8V
VVINI N=1.5V
1.5 V
3.25
3.20
3.0V
1
100
3.55
3.50
3.25
3.20
0.1
10
IOUT
IOUT(mA)
(mA)
3.55
3.50
(CDRH5D18/4.1 H,H,
NDS335N)
(CDRH5D18/4.1
NDS335N)
NO
T
(V)
V
VVOUT
(V)
OUT(V)
3.35
3.30
1
(6) S-8340A33AFT
3.55
3.50
3.45
3.40
2.4V
3.25
3.20
(7) S-8341A33AFT
3.60
N=1.5V
VV
1.5 V
INI
0.1
3.0V
100
1.8V
FO
(V)
V
VOUT (V)
MM
EN
1000
1.8V
VVINI N=1.2V
1.2 V
CO
(V)
V
100
2.48
2.46
(CDRH5D18/4.1
H, NDS335N)
(CDRH5D18/4.1
H,NDS335N)
3.55
3.50
VOUT (V)
10
IOUT
IOUT(mA)
(mA)
2.52
2.50
D
1.8V
1
2.56
2.54
DE
(V)
V
VOUT (V)
1.5V
(5) S-8340A33AFT
3.35
3.30
1000
(CDRH124/10
H,
FTS2001)
(CDRH124/10
FTS2001)
H,
2.60
2.58
VVINI N=1.2V
1.2 V
2.48
2.46
3.45
3.40
100
R
2.62
2.60
2.58
3.60
10
IOUT(mA)
(mA)
IOUT
(4) S-8341A25AFT
(CDRH5D18/4.1
H,H,
NDS335N)
(CDRH5D18/4.1
NDS335N)
0.1
1
NE
(3) S-8341A25AFT
2.52
2.50
2.4V
0.1
IOUT
IOUT(mA)
(mA)
2.56
2.54
1.8V
2.48
2.46
1.8V
0.1
VVINI N=1.5V
1.5 V
W
(V)
1.5V
VVINI N=1.2V
1.2 V
2.48
2.46
2.56
2.54
V
2.54
2.52
2.50
2.62
(CDRH124/10 H,
FTS2001)
(CDRH124/10
FTS2001)
H,
2.60
2.58
2.58
2.56
N
(CDRH5D18/4.1
H, NDS335N)
(CDRH5D18/4.1
H,NDS335N)
VOUT (V)
V
VOUT (V)
(V)
2.62
2.60
(2) S-8340A25AFT
DE
SI
G
(1) S-8340A25AFT
1000
3.0V
0.1
1
10
100
IOUT
IOUT(mA)
(mA)
1000
10000
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
5.20
5.15
5.30
5.25
3.0V
VVINI N=1.8V
1.8 V
5.10
5.05
5.00
4.95
4.5V
4.90
(CDRH124/10
FTS2001)
(CDRH124/10
H,H,
FTS2001)
VIINN=1.8V
1.8 V
V
5.20
5.15
5.10
5.05
4.5V
5.00
4.95
4.90
0.1
1
10
100
1000
0.1
1
5.30
5.25
4.5V
10
100
1000
VIN
1.8 V
VI N=1.8V
5.00
4.95
0.1
4.5V
MM
EN
(CDRH6D28/10
H, FDN335N)
(CDRH6D28/10
H,FDNS335N)
2.58
2.56
1.5V
VINV 1.2
V
=1.2V
IN
2.54
2.52
2.50
10
CO
1
2.60
2.58
10000
10
100
1.8V
VVIN =1.5V
1.5 V
2.56
2.54
IN
2.52
2.50
2.48
2.46
1000
2.4V
0.1
1
100
2.56
2.54
2.52
2.50
1.8V
VVINI N=1.5V
1.5 V
2.48
2.46
1.8V
10
(V)
1.5V
V
V
1.2 V
VINI N=1.2V
IIOUT
(mA)
OUT (mA)
1000
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
2.60
2.58
2.48
2.46
1
2.62
VOUT (V)
2.54
2.52
2.50
100
(16) S-8341C25AFT
RE
NO
T
2.58
2.56
10
IOUT
(mA)
IOUT
(mA)
(CDRH6D28/10
H, FDN335N)
(CDRH6D28/10
H,FDNS335N)
0.1
1000
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
IIOUT
(mA)
OUT (mA)
(15) S-8341C25AFT
100
IOUT
(mA)
IOUT
(mA)
2.62
1.8V
2.48
2.46
0.1
1
(14) S-8340C25AFT
DE
(13) S-8340C25AFT
(V)
3.0V
5.10
5.05
D
1
IIOUT
(mA)
OUT(mA)
VOUT
V (V)
(V)
5.20
5.15
4.90
0.1
V
10000
R
5.00
4.95
4.90
VOUT (V)
1000
(CDRH124/10
H,H,
FTS2001)
(CDRH124/10
FTS2001)
FO
5.10
5.05
VOUT
V (V)(V)
3.0V
VVINI N=1.8V
1.8 V
VOUT
V (V)
(V)
VOUT
V (V)(V)
(CDRH5D18/4.1
NDS335N)
(CDRH5D18/4.1
H,H,
NDS335N)
5.20
5.15
2.62
2.60
100
(12) S-8341A50AFT
NE
(11) S-8341A50AFT
2.62
2.60
10
IOUT
(mA)
IOUT
(mA)
W
IIOUT
(mA)
OUT (mA)
5.30
5.25
3.0V
N
(CDRH5D18/4.1
NDS335N)
(CDRH5D18/4.1
H,H,
NDS335N)
VOUT
V (V)(V)
VOUT
V (V)
(V)
5.30
5.25
(10) S-8340A50AFT
DE
SI
G
(9) S-8340A50AFT
1000
2.4V
0.1
1
10
100
1000
IOUT(mA)
(mA)
IOUT
41
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(17) S-8340C33AFT
(CDRH6D28/10
H, FDN335N)
(CDRH6D28/10
H,FDN335N)
3.60
VV
1.2 V
IN =1.2V
IN
3.45
3.40
3.35
3.30
3.35
3.30
3.0V
3.25
3.20
0.1
1
10
N
1.8V
VIN
1.5 V
V =1.5V
IN
3.0V
3.25
3.20
100
0.1
1000
1
3.60
5.00
4.95
4.5V
100
(V)
R
V
1.8 V
VINI N=1.8V
10000
3.0V 4.5V
5.10
5.05
5.00
4.95
0.1
1
10
100
1000
10000
(24) S-8341C50AFT
5.30
5.25
(V)
3.0V
V
VOUT (V)
5.00
4.95
1
1000
IOUT
(mA)
IOUT
(mA)
VVINI N=1.8V
1.8 V
5.10
5.05
0.1
100
4.90
(CDRH6D28/10
FDN335N)
H,
(CDRH6D28/10
H,
FDN335N)
5.20
5.15
10
(CDRH124/10
FTS2001)
(CDRH124/10
H,
FTS2001)
H,
5.20
5.15
1000
4.5V
4.90
42
(V)
3.0V
RE
10
IIOUT
(mA)
OUT (mA)
NO
T
(V)
V
VOUT (V)
CO
4.90
5.30
5.25
1
IIOUT
(mA)
OUT (mA)
5.30
5.25
V
VVINI N=1.8V
1.8 V
5.10
5.05
(23) S-8341C50AFT
0.1
DE
MM
EN
(V)
V
VOUT (V)
5.20
5.15
1
V
VOUT (V)
1000
(22) S-8340C50AFT
(CDRH6D28/10
FDN335N)
(CDRH6D28/10
H,
FDN335N)
H,
0.1
VVINI N=1.5V
1.5 V
3.0V
D
100
IOUT
IOUT(mA)
(mA)
(21) S-8340C50AFT
1.8V
3.25
3.20
3.0V
10
3.35
3.30
FO
IN
1
3.45
3.40
VOUT (V)
(V)
V
VOUT (V)
1.8V
VVIN =1.2V
1.2 V
3.25
3.20
5.30
5.25
10000
(CDRH124/10
H, FTS2001)
(CDRH124/10
H,FTS2001)
3.55
3.50
0.1
1000
W
(CDRH6D28/10
H, FDN335N)
(CDRH6D28/10
H,FDN335N)
3.55
3.50
3.35
3.30
100
(20) S-8341C33AFT
NE
(19) S-8341C33AFT
3.45
3.40
10
IOUT
(mA)
IOUT
(mA)
IOUT
IOUT(mA)
(mA)
3.60
DE
SI
G
1.8V
(V)
3.45
3.40
(CDRH124/10
H, FTS2001)
(CDRH124/10
H,FTS2001)
3.55
3.50
VOUT (V)
VOUT
V (V)(V)
3.55
3.50
V
3.60
(18) S-8340C33AFT
(CDRH124/10
FTS2001)
(CDRH124/10
H,
FTS2001)
H,
5.20
5.15
3.0V
VVINI N
1.8 V
=1.8V
5.10
5.05
5.00
4.95
4.5V
4.90
10
IIOUT
(mA)
OUT (mA)
100
1000
0.1
1
10
IOUT
(mA)
OUT(mA)
100
1000
10000
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
4. Output Current (IOUT) vs. PFM/PWM Switching Input Voltage (VIN) Characteristics
The following shows the actual output current (IOUT) vs. PFM/PWM switching input voltage (VIN) characteristics when
the S-8341 Series is used under conditions (25) to (36) in Tables 12 and 13.
1.5
PW M
1.0
2.0
V (V)
V (V)
2.0
1.5
0.5
0.0
0.0
10
100
1000
1
IIOUT
(mA)
OUT (mA)
(27) S-8341A33AFT
PW M
D
0.0
10
100
IOUT
IOUT(mA)
(mA)
(29) S-8341A50AFT
PFM
3.0
1.0
0.0
1
10
IOUT
IOUT(mA)
(mA)
RE
0.1
CO
2.0
PW M
N
1000
PFM
3.0
2.0
PW M
0.0
100
1000
1
10
100
IOUT
IOUT(mA)
(mA)
1000
(32) S-8341C25AFT
3.5
NO
T
(CDRH124/10
FTS2001)
H,
(CDRH124/10
H,
FTS2001)
3.0
PFM
2.5
2.0
VIN (V)
V (V)
VIN (V)
10
100
IOUT
IOUT(mA)
(mA)
(CDRH124/10
FTS2001)
(CDRH124/10
H,
FTS2001)
H,
4.0
2.0
V (V)
0.0
5.0
PFM
2.5
0.5
(30) S-8341A50AFT
(CDRH6D28/10
FDN335N)
H,
(CDRH6D28/10 H,
NDS335N)
3.0
1.0
1.0
(31) S-8341C25AFT
3.5
PW M
1.5
1
(CDRH5D18/4.1
NDS335N)
(CDRH5D18/4.1 H,H,
NDS335N)
4.0
2.0
1000
MM
EN
1
DE
0.5
V
VIN (V)
(V)
(V)
V VIN(V)
1.5
1.0
PFM
FO
2.5
2.0
5.0
100
(CDRH124/10
FTS2001)
(CDRH124/10 H,
FTS2001)
H,
3.0
PFM
2.5
(V)
V VIN(V)
3.5
R
3.0
10
IOUT
IOUT(mA)
(mA)
(28) S-8341A33AFT
(CDRH5D18/4.1
NDS335N)
H,
(CDRH5D18/4.1 H,
NDS335N)
VIN (V)
V
(V)
3.5
PW M
1.0
0.5
1
PFM
2.5
VIN (V)
VIN (V)
3.0
PFM
2.5
(CDRH124/10
FTS2001)
(CDRH124/10 H,
FTS2001)
H,
W
3.0
3.5
NE
3.5
(26) S-8341A25AFT
(CDRH5D18/4.1
NDS335N)
H,
(CDRH5D18/4.1 H,
NDS335N)
DE
SI
G
(25) S-8341A25AFT
1.5
PW M
1.0
1.5
PW M
1.0
0.5
0.5
0.0
0.0
1
10
IOUT
IOUT(mA)
(mA)
100
1
10
IOUT(mA)
(mA)
IOUT
100
43
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
3.0
PFM
2.5
VIN (V)
PW M
1.0
2.0
V (V)
1.5
0.5
0.0
0.0
1
10
100
1000
1
IIOUT
(mA)
OUT(mA)
(35) S-8341C50AFT
5.0
4.0
PFM
3.0
100
1.0
PFM
R
PW M
(CDRH124/10
FTS2001)
(CDRH124/10 H,
H,FTS2001)
2.0
FO
2.0
V (V)
3.0
IN
V (V)
V (V)
10
IOUT
(mA)
IOUT
(mA)
(36) S-8341C50AFT
(CDRH6D28/10
FDN335N)
H,
(CDRH6D28/10
H,
FDN335N)
4.0
IN
V (V)
PW M
1.0
W
V (V)
IN
V (V)
1.5
0.5
PW M
1.0
0.0
0.0
10
100
NO
T
RE
CO
MM
EN
DE
IIOUT
(mA)
OUT (mA)
1000
D
1
44
PFM
2.5
2.0
5.0
(CDRH124/10
FTS2001)
(CDRH124/10 H,
FTS2001)
H,
DE
SI
G
3.0
3.5
NE
3.5
(34) S-8341C33AFT
(CDRH6D28/10
FDN335N)
H,
(CDRH6D28/10
H,
FDN335N)
N
(33) S-8341C33AFT
1
10
100
IIOUT
(mA)
OUT (mA)
1000
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
5. Output Current (IOUT) vs. Ripple Voltage (Ripple) Characteristics
The following shows the actual output current (IOUT) vs. ripple voltage (Ripple) characteristics when the S-8340/8341
Series is used under conditions (37) to (60) in Tables 14 and 15.
(CDRH5D18/4.1
H,NDS335N,
47 F) F)
(CDRH5D18/4.1
H, NDS335N,47
Ripple (mV)
200
1.5V
150
100
50
IOUT
IOUT(mA)
(mA)
100
1
Ripple(mV)
Ripple (mV)
1.8V
200
D
100
0
100
1000
IOUT
IOUT(mA)
(mA)
250
CO
100
50
1
10
RE
0
IOUT
(mA)
IOUT
(mA)
IOUT
(mA)
Ripple(mV)
1.5V
2.4V
100
0
100
1000
IOUT
(mA)
IOUT
(mA)
1.8V
10000
(CDRH5D18/4.1
H, NDS335N,47
(CDRH5D18/4.1
H,NDS335N,
47 F 2)
F 2)
250
Ripple (mV)
150
VIN
1.5 V
VI N=1.5V
200
300
VINVI N1.2
V
=1.2V
200
300
10
NDS335N,47
((CDRH5D18/4.1
CDRH5D18/4.1 H,H,
NDS335N,
47 F) F)
1000
1.8V
400
10000
MM
EN
(39) S-8341A25AFT
100
(CDRH124/10H,
(CDRH5D18/4.1
NDS335N, 47 FF
2)2)
H,FTS2001,100
FO
2.4V
400
10
IOUT(mA)
(mA)
IOUT
500
VVINI N=1.5V
1.5 V
300
10
R
600
DE
Ripple
(mV)
Ripple(mV)
VINVIN1.2
V
=1.2V
1000
(CDRH124/10
H,
FTS2000, 47 F F
2) 2)
(CDRH124/10
H,FTS2001,47
500
Ripple(mV)
100
NE
10
(38) S-8340A25AFT
Ripple (mV)
1.5V
150
0
1
300
1.8V
200
50
1.8V
0
600
DE
SI
G
250
VVININ=1.2V
1.2 V
Ripple(mV)
Ripple (mV)
Ripple(mV)
250
(CDRH5D18/4.1
H,NDS335N,
47 F 2)
(CDRH5D18/4.1
H,NDS335N,47
F2)
300
W
300
N
(37) S-8340A25AFT
1.8V
200
1.5V
150
VIN=1.2V
VIN
1.2 V
100
50
0
100
1000
1
10
IOUT
IOUT(mA)
(mA)
100
1000
(40) S-8341A25AFT
(CDRH124/10H, FTS2001,47F 2)
NO
T
Ripple
(mV)
Ripple(mV)
500
600
400
300
200
1.8V
100
2.4V
0
10
100
1000
IOUT
IOUT(mA)
(mA)
(CDRH124/10H,FTS2001,100F 2)
500
VV
1.5 V
N=1.5V
INI
Ripple
(mV)
Ripple(mV)
600
10000
400
1.8V
300
2.4V
VIN=1.5V
VIN
1.5 V
200
100
0
10
100
1000
IOUT
IOUT(mA)
(mA)
10000
45
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(41) S-8340A33AFT
250
1.8V
200
Ripple (mV)
150
100
50
3.0V
0
150
100
VINVIN=1.2V
1.2 V
50
0
1
10
IIOUT
(mA)
OUT (mA)
100
1000
1
(42) S-8340A33AFT
(CDRH124/10
H,H,
FTS2001,
47 F 2)F 2)
(CDRH124/10
FTS2001,47
Ripple (mV)
3.0V
100
0
IOUT
(mA)
OUT (mA)
1000
3.0V
100
DE
MM
EN
150
100
50
Ripple (mV)
3.0V
1.8V
0
1
10
100
NO
T
10000
VINVIN=1.2V
1.2 V
150
3.0V
100
50
1.8V
1
600
10
IOUT
IOUT(mA)
(mA)
100
1000
(CDRH124/10
F 2)
(CDRH124/10
H,
FTS2001, 100 F 2)
H,FTS2001,100
500
V
VININ1.5
1.5VV
400
1000
(CDRH5D18/4.1
H,NDS335N,47
F 2)
(CDRH5D18/4.1
H,NDS335N,
47 F 2)
200
1000
(CDRH124/10
FTS2001,47
F 2)
(CDRH124/10
H,
FTS2001,
47 F 2)
H,
500
IOUT
IOUT(mA)
(mA)
0
RE
(44) S-8341A33AFT
(mA)
IOUT (mA)
100
250
Ripple(mV)
200
10
300
VV
1.2 V
INI
N=1.2V
CO
Ripple (mV)
Ripple(mV)
1.8V
200
10000
(CDRH5D18/4.1
NDS335N,47
(CDRH5D18/4.1 H,H,
NDS335N,
47 F) F)
250
Ripple (mV)
IN
300
D
100
(43) S-8341A33AFT
Ripple(mV)
VIN
1.5 V
V =1.5V
400
0
10
VI N=1.5V
3.0V
300
200
1.8V
100
0
VINV =1.5V
1.5 V
400
IN
1.8V
300
200
3.0V
100
0
10
46
1000
FO
200
600
100
(CDRH124/10
FTS2001,100
(CDRH124/10
H,
FTS2001,
100 F 2)F 2)
H,
R
Ripple(mV)
1.8V
300
300
IIOUT
(mA)
OUT(mA)
500
Ripple (mV)
Ripple (mV)
400
10
NE
VINVI N1.5
V
=1.5V
500
Ripple(mV)
600
Ripple(mV)
600
3.0V
1.8V
W
Ripple (mV)
200
IN
(CDRH5D18/4.1
H, NDS335N,47
(CDRH5D18/4.1
H,NDS335N,
47 F 2)
F 2)
N
VINV =1.2V
1.2 V
250
Ripple(mV)
300
DE
SI
G
(CDRH5D18/4.1
NDS335N,47
(CDRH5D18/4.1
H,H,
NDS335N,
47 F) F)
Ripple(mV)
300
100
IOUT (mA)
(mA)
1000
10000
10
100
IOUT(mA)
(mA)
IOUT
1000
10000
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(45) S-8340A50AFT
(CDRH5D18/4.1
H, NDS335N,47
(CDRH5D18/4.1
H,NDS335N,
47 F) F)
4.5V
150
100
50
3.0V
0
N
200
10
IOUT
(mA)
OUT(mA)
100
150
VV
1.8 V
INI
N=1.8V
100
50
1000
1
(46) S-8340A50AFT
(CDRH124/10
FTS2001,47
F 2)
(CDRH124/10
H,H,
FTS2001,
47 F 2)
4.5V
IN
Ripple (mV)
50
IOUT
IOUT(mA)
(mA)
1000
DE
(CDRH5D18/4.1
H, NDS335N,47
(CDRH5D18/4.1
H,NDS335N,
47 F) F)
MM
EN
100
3.0V
0
1
CO
50
10
100
200
500
VVINI N=1.8V
1.8 V
400
3.0V
100
0
3.0V
1
4.5V
200
4.5V
100
600
300
VV
1.8 V
IN =1.8V
IN
150
1000
Ripple (mV)
NO
T
400
10000
(CDRH5D18/4.1
H, NDS335N,47
(CDRH5D18/4.1
H,NDS335N,
47 F 2)
F 2)
0
(CDRH124/10
FTS2001,47
(CDRH124/10
H,H,
FTS2001,
47 F 2)F 2)
500
1000
50
RE
(48) S-8341A50AFT
IOUT
IOUT(mA)
(mA)
Ripple (mV)
150
IOUT (mA)
(mA)
250
Ripple(mV)
200
100
300
VVINI N=1.8V
1.8 V
250
10
350
4.5V
300
Ripple (mV)
10000
D
100
(47) S-8341A50AFT
Ripple(mV)
100
0
10
Ripple (mV)
4.5V
150
50
0
Ripple(mV)
200
3.0V
FO
100
1000
VVINI N
1.8 V
=1.8V
R
Ripple(mV)
3.0V
Ripple(mV)
Ripple (mV)
Ripple(mV)
200
600
100
(CDRH124/10
H,FTS2001,
100 F 2)
(CDRH124/10
H,FTS2001,100
F 2)
250
150
IIOUT
(mA)
OUT (mA)
300
250
350
10
NE
VV
1.8 V
IN =1.8V
300
350
4.5V
3.0V
0
1
350
DE
SI
G
Ripple (mV)
200
(CDRH5D18/4.1
H,NDS335N,47
F 2)
(CDRH5D18/4.1
H,NDS335N,
47 F 2)
250
VV
1.8 V
INI
N=1.8V
Ripple(mV)
Ripple (mV)
250
Ripple(mV)
300
W
300
10
IOUT
IOUT(mA)
(mA)
100
1000
(CDRH124/10
H, FTS2001,100
(CDRH124/10
H,FTS2001,
100 F
2)F 2)
VVINI N
1.8 V
=1.8V
300
4.5V
200
3.0V
100
0
10
100
IOUT (mA)
(mA)
1000
10000
10
100
IOUT (mA)
(mA)
1000
10000
47
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(49) S-8340C25AFT
(CDRH6D28/10
H, FDN335N,47
(CDRH6D28/10
H,FDN335N,
47 F) F)
300
VINVIN=1.2V
1.2 V
150
100
50
1.5V
0
1.8V
200
150
VIN
1.2 V
V =1.2V
100
IN
50
0
1
10
IOUT
(mA)
OUT (mA)
100
1000
1
(50) S-8340C25AFT
(CDRH124/10
FTS2001,47
(CDRH124/10
H,H,
FTS2001,
47 F 2)F 2)
500
2.4V
0
IIOUT
(mA)
OUT (mA)
1000
DE
MM
EN
2.4V
VVIN =1.5V
1.5 V
IN
VV
1.2 V
IN =1.2V
IN
150
100
50
1.8V
0
1
10
RE
(52) S-8341C25AFT
IOUT
IOUT(mA)
(mA)
100
NO
T
1.8V
1000
10000
(CDRH6D28/10
H, FDN335N,100
CDRH6D28/10
H,FDN335N,
100 F) F)
1.8V
1.5V
150
VINVI N=1.2V
1.2 V
100
50
0
1
500
10
IIOUT
(mA)
OUT (mA)
100
1000
(CDRH124/10
FTS2001,100
(CDRH124/10
H,H,
FTS2001,
100 F
2)F 2)
400
2.4V
Ripple(mV)
Ripple (mV)
VV
1.5 V
IN =1.5V
IN
300
IOUT
IOUT(mA)
(mA)
200
1000
(CDRH124/10
H, FTS2001,47
(CDRH124/10
H,FTS2001,
47 F
2)F 2)
400
100
250
Ripple (mV)
200
10
300
1.5V
CO
Ripple (mV)
Ripple(mV)
10000
(CDRH6D28/10
H, FDN335N,47
(CDRH6D28/10
H,FDN335N,
47 F) F)
250
Ripple (mV)
1.8V
100
D
100
(51) S-8341C25AFT
Ripple(mV)
200
0
10
200
100
0
1.8V
300
VINVIN=1.5V
1.5 V
200
2.4V
100
0
10
48
1000
300
FO
VV
1.5 V
IN =1.5V
IN
100
500
100
(CDRH124/10
FTS2001,100
(CDRH124/10
H,H,
FTS2001,
100 F
2)F 2)
R
200
Ripple (mV)
1.8V
Ripple(mV)
300
300
IIOUT
(mA)
OUT(mA)
400
Ripple(mV)
Ripple(mV)
Ripple (mV)
400
10
1.5V
NE
500
DE
SI
G
Ripple (mV)
200
N
250
1.8V
Ripple(mV)
Ripple(mV)
Ripple (mV)
250
(CDRH6D28/10
H, FDN335N,100
(CDRH6D28/10
H,FDN335N,
100 F) F)
W
300
100
IOUT
IOUT(mA)
(mA)
1000
10000
10
100
IOUT
IOUT(mA)
(mA)
1000
10000
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(53) S-8340C33AFT
(CDRH6D28/10
H, FDN335N,47
(CDRH6D28/10
H,FDN335N,
47 F) F)
300
VVIN =1.2V
1.2 V
150
IN
100
50
3.0V
0
1
10
IIOUT
(mA)
OUT (mA)
100
200
VIN
1.2 V
VIN=1.2V
100
50
0
1000
1
(CDRH124/10
FTS2001,47
F 2)
(CDRH124/10
H,
FTS2001,
47 F 2)
H,
Ripple (mV)
1.8V
200
0
IIOUT
(mA)
OUT (mA)
1000
DE
3.0V
IN
150
100
50
1.8V
0
1
10
100
(CDRH6D28/10
H, FDN335N,100
(CDRH6D28/10
H,FDN335N,
100 F) F)
3.0V
VINV =1.2V
1.2 V
150
IN
100
50
1.8V
1
500
Ripple (mV)
3.0V
VVINI N=1.5V
1.5 V
Ripple(mV)
NO
T
10000
10
IOUT
IOUT(mA)
(mA)
100
1000
(CDRH124/10
FTS2001,100
(CDRH124/10
H,H,
FTS2001,
100 F
2)F 2)
400
300
200
1000
200
1000
(CDRH124/10
FTS2001,47
F 2)
(CDRH124/10
H,
FTS2001,
47 F 2)
H,
400
(mA)
IIOUT
OUT(mA)
0
RE
(56) S-8341C33AFT
IOUT(mA)
(mA)
IOUT
100
250
Ripple (mV)
MM
EN
VIN
1.2 V
V =1.2V
200
10
300
3.0V
CO
Ripple (mV)
1.8V
VIN
1.5 V
VI N=1.5V
100
10000
(CDRH6D28/10
H,FDN335N,
47 F) F)
(CDRH6D28/10
H, FDN335N,47
250
Ripple(mV)
200
D
100
(55) S-8341C33AFT
Ripple (mV)
300
0
10
Ripple(mV)
1000
FO
VIN
1.5 V
VIN=1.5V
100
500
100
(CDRH124/10
FTS2001,100
(CDRH124/10
H,H,
FTS2001,
100 F
2)F 2)
R
Ripple(mV)
3.0V
300
300
IIOUT
(mA)
OUT (mA)
400
Ripple(mV)
Ripple(mV)
Ripple (mV)
400
10
NE
500
3.0V
1.8V
150
(54) S-8340C33AFT
500
DE
SI
G
Ripple (mV)
200
N
250
1.8V
Ripple(mV)
Ripple(mV)
Ripple (mV)
250
(CDRH6D28/10
H, FDN335N,100
(CDRH6D28/10
H,FDN335N,
100 F) F)
W
300
1.8V
100
0
300
3.0V
200
VINVIN=1.5V
1.5 V
1.8V
100
0
10
100
IOUT(mA)
(mA)
IOUT
1000
10000
10
100
(mA)
IIOUT
OUT(mA)
1000
10000
49
STEP-UP, 600 kHz, PWM CONTROL OR PWM/PFM SWITCHABLE SWITCHING REGULATOR CONTROLLER
Rev.4.0_02
S-8340/8341 Series
(57) S-8340C50AFT
(CDRH6D28/10
H, FDN335N,47
(CDRH6D28/10
H,FDN335N,
47 F) F)
4.5V
150
VIN
1.8 V
V =1.8V
IN
100
50
0
N
4.5V
3.0V
200
150
VIN
1.8 V
VIN=1.8V
100
50
0
10
IIOUT
(mA)
OUT (mA)
100
1000
1
(58) S-8340C50AFT
(CDRH124/10
H, FTS2001,47
(CDRH124/10
H,FTS2001,
47 F
2)F 2)
4.5V
Ripple (mV)
100
IIOUT
(mA)
OUT (mA)
1000
(CDRH6D28/10
H, FDN335N,47
(CDRH6D28/10
H,FDN335N,
47 F) F)
4.5V
100
50
Ripple (mV)
150
3.0V
0
1
10
RE
(60) S-8341C50AFT
IIOUT
(mA)
OUT (mA)
100
1000
10000
(CDRH6D28/10
H, FDN335N,100
(CDRH6D28/10
H,FDN335N,
100 F) F)
200
4.5V
150
VV
1.8 V
IN =1.8V
IN
100
50
1000
3.0V
1
500
10
IOUT(mA)
(mA)
IOUT
100
1000
(CDRH124/10
FTS2001,100
F 2)
(CDRH124/10
H,
FTS2001,
100 F 2)
H,
4.5V
400
VVIN =1.8V
1.8 V
IN
300
3.0V
200
100
0
Ripple (mV)
NO
T
(mA)
IIOUT
OUT (mA)
0
(CDRH124/10
FTS2001,47
(CDRH124/10
H,H,
FTS2001,
47 F 2)F 2)
400
100
250
Ripple(mV)
MM
EN
VIN
1.8 V
VIN=1.8V
CO
Ripple (mV)
200
10
300
4.5V
250
Ripple(mV)
VV
=1.8V
1.8 V
INI N
100
10000
DE
(59) S-8341C50AFT
Ripple (mV)
200
D
10
Ripple(mV)
3.0V
300
0
0
4.5V
300
VV
1.8 V
IN =1.8V
IN
200
100
3.0V
0
10
50
(CDRH124/10
FTS2001,100
(CDRH124/10
H,H,
FTS2001,
100 F
2)F 2)
R
Ripple(mV)
100
500
1000
FO
200
300
100
400
VVINI N=1.8V
1.8 V
300
IOUT
IOUT(mA)
(mA)
NE
3.0V
Ripple(mV)
Ripple(mV)
Ripple (mV)
400
500
10
W
1
500
DE
SI
G
200
(CDRH6D28/10
H, FDN335N,100
(CDRH6D28/10
H,FDN335N,
100 F) F)
250
3.0V
Ripple (mV)
Ripple (mV)
250
Ripple(mV)
300
Ripple(mV)
300
100
IOUT
IOUT(mA)
(mA)
1000
10000
10
100
IOUT(mA)
(mA)
IOUT
1000
10000
+0.3
5
1
4
NE
W
DE
SI
G
8
N
3.00 -0.2
DE
D
FO
R
0.17±0.05
MM
EN
0.2±0.1
CO
0.65
NO
T
RE
No. FT008-A-P-SD-1.2
TITLE
TSSOP8-E-PKG Dimensions
No.
FT008-A-P-SD-1.2
ANGLE
UNIT
mm
ABLIC Inc.
4.0±0.1
2.0±0.05
ø1.55±0.05
DE
SI
G
N
0.3±0.05
+0.1
8.0±0.1
NE
W
ø1.55 -0.05
FO
R
(4.4)
+0.4
MM
EN
DE
D
6.6 -0.2
8
1
4
Feed direction
NO
T
RE
CO
5
No. FT008-E-C-SD-1.0
TITLE
TSSOP8-E-Carrier Tape
FT008-E-C-SD-1.0
No.
ANGLE
UNIT
mm
ABLIC Inc.
N
DE
SI
G
W
NE
R
FO
D
2±0.5
ø13±0.5
CO
MM
EN
ø21±0.8
17.5±1.0
DE
Enlarged drawing in the central part
13.4±1.0
NO
T
RE
No. FT008-E-R-SD-1.0
TITLE
TSSOP8-E-Reel
No.
FT008-E-R-SD-1.0
QTY.
ANGLE
UNIT
mm
ABLIC Inc.
3,000
N
DE
SI
G
W
NE
R
FO
D
2±0.5
ø13±0.5
CO
MM
EN
ø21±0.8
17.5±1.0
DE
Enlarged drawing in the central part
13.4±1.0
NO
T
RE
No. FT008-E-R-S1-1.0
TITLE
TSSOP8-E-Reel
FT008-E-R-S1-1.0
No.
QTY.
ANGLE
UNIT
mm
ABLIC Inc.
4,000
Disclaimers (Handling Precautions)
All the information described herein (product data, specifications, figures, tables, programs, algorithms and application
circuit examples, etc.) is current as of publishing date of this document and is subject to change without notice.
2.
The circuit examples and the usages described herein are for reference only, and do not guarantee the success of
any specific mass-production design.
ABLIC Inc. is not responsible for damages caused by the reasons other than the products described herein
(hereinafter "the products") or infringement of third-party intellectual property right and any other right due to the use
of the information described herein.
3.
ABLIC Inc. is not responsible for damages caused by the incorrect information described herein.
4.
Be careful to use the products within their specified ranges. Pay special attention to the absolute maximum ratings,
operation voltage range and electrical characteristics, etc.
ABLIC Inc. is not responsible for damages caused by failures and / or accidents, etc. that occur due to the use of the
products outside their specified ranges.
5.
When using the products, confirm their applications, and the laws and regulations of the region or country where they
are used and verify suitability, safety and other factors for the intended use.
6.
When exporting the products, comply with the Foreign Exchange and Foreign Trade Act and all other export-related
laws, and follow the required procedures.
7.
The products must not be used or provided (exported) for the purposes of the development of weapons of mass
destruction or military use. ABLIC Inc. is not responsible for any provision (export) to those whose purpose is to
develop, manufacture, use or store nuclear, biological or chemical weapons, missiles, or other military use.
8.
The products are not designed to be used as part of any device or equipment that may affect the human body, human
life, or assets (such as medical equipment, disaster prevention systems, security systems, combustion control
systems, infrastructure control systems, vehicle equipment, traffic systems, in-vehicle equipment, aviation equipment,
aerospace equipment, and nuclear-related equipment), excluding when specified for in-vehicle use or other uses. Do
not apply the products to the above listed devices and equipments without prior written permission by ABLIC Inc.
Especially, the products cannot be used for life support devices, devices implanted in the human body and devices
that directly affect human life, etc.
Prior consultation with our sales office is required when considering the above uses.
ABLIC Inc. is not responsible for damages caused by unauthorized or unspecified use of our products.
9.
Semiconductor products may fail or malfunction with some probability.
The user of the products should therefore take responsibility to give thorough consideration to safety design including
redundancy, fire spread prevention measures, and malfunction prevention to prevent accidents causing injury or
death, fires and social damage, etc. that may ensue from the products' failure or malfunction.
The entire system must be sufficiently evaluated and applied on customer's own responsibility.
MM
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1.
10. The products are not designed to be radiation-proof. The necessary radiation measures should be taken in the
product design by the customer depending on the intended use.
CO
11. The products do not affect human health under normal use. However, they contain chemical substances and heavy
metals and should therefore not be put in the mouth. The fracture surfaces of wafers and chips may be sharp. Be
careful when handling these with the bare hands to prevent injuries, etc.
12. When disposing of the products, comply with the laws and ordinances of the country or region where they are used.
RE
13. The information described herein contains copyright information and know-how of ABLIC Inc.
The information described herein does not convey any license under any intellectual property rights or any other
rights belonging to ABLIC Inc. or a third party. Reproduction or copying of the information from this document or any
part of this document described herein for the purpose of disclosing it to a third-party without the express permission
of ABLIC Inc. is strictly prohibited.
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14. For more details on the information described herein, contact our sales office.
2.0-2018.01
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