S-882Z Series
www.sii-ic.com
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC
FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
© Seiko Instruments Inc., 2005-2010
The S-882Z Series is a charge pump IC for step-up DC-DC converter startup, which differs from conventional charge pump
ICs, in that it uses fully depleted SOI (Silicon on Insulator) technology to enable ultra-low voltage operation.
Being capable of stepping up an extremely low input voltage of 0.3 to 0.35 V, this series enables the efficient use of very low
energy levels. The stepped up electric power is stored in a startup capacitor, and it is discharged as the startup power of the
step-up DC-DC converter when the startup capacitor reaches the discharge start voltage level.
Moreover, a built-in shutdown function is also provided, so that when the output voltage of the connected step-up DC-DC
converter rises above a given value, the operation is stopped, thereby achieving significant power saving and battery life
extension.
The S-882Z Series chips come in a small SOT-23-5 package, allowing high-density mounting.
Features
• Operating input voltage
• Current consumption
•
•
•
•
•
0.3 to 3.0 V
During operation : 0.5 mA max. (at VIN = 0.3 V)
During shutdown : 0.6 μA max. (at VIN = 0.3 V)
Discharge start voltage 1.8 to 2.4 V (selectable in 0.2 V steps)
Shutdown voltage
Discharge start voltage + 0.1 V (fixed)
Oscillation frequency
350 kHz typ. (at VIN = 0.3 V)
*1
External component
Startup capacitor (CCPOUT), 1 unit
*2
Lead-free, Sn 100%, halogen-free
*1. The addition of a Schottky diode or a power smoothing capacitor may be necessary depending on the output
smoothing capacitor value of the step-up DC-DC converter and the output voltage value. (Refer to Example of
Connection with Step-up DC-DC Converter.)
*2. Refer to “ Product Name Structure” for details.
Applications
• Stepping up from low-voltage power supply such as solar cell and fuel cell
• Stepping up internal power supply voltage of RF tag
• Intermittent power supply to intermittently operating system
Package
• SOT-23-5
Seiko Instruments Inc.
1
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Block Diagram
CCPOUT
CPOUT
5
*1
VIN
4
Charge pump circuit
M1
*1
Oscillation
circuit
3
VM
*1
VREF
−
+
EN−
COMP2
2
*1. Parasitic diode
Figure 1
2
OUT
COMP1
−
+
CLK signal
VSS
1
Seiko Instruments Inc.
*1
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Product Name Structure
The discharge start voltage for the S-882Z Series can be selected at the user’s request. 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.
1.
Product Name
S-882Z
xx -
M5T1
x
Environmental code
U: Lead-free (Sn 100%), halogen-free
G: Lead-free (for details, please contact our sales office)
Package name (abbreviation) and packing specifications*1
M5T1 : SOT-23-5, tape
Discharge start voltage
18 : 1.8 V
20 : 2.0 V
22 : 2.2 V
24 : 2.4 V
*1. Refer to the taping specifications at the end of this book.
2.
Package
Package Name
SOT-23-5
3.
Drawing Code
Tape
MP005-A-C-SD
Package
MP005-A-P-SD
Reel
MP005-A-R-SD
Product Name List
Table 1
Discharge Start Voltage
Shutdown Voltage
Product Name
1.8 V ± 0.1 V
1.9 V ± 0.1 V
S-882Z18-M5T1x
2.0 V ± 0.1 V
2.1 V ± 0.1 V
S-882Z20-M5T1x
2.2 V ± 0.1 V
2.3 V ± 0.1 V
S-882Z22-M5T1x
2.4 V ± 0.1 V
2.5 V ± 0.1 V
S-882Z24-M5T1x
Remark 1. Contact the SII marketing department for products with discharge start 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.
Seiko Instruments Inc.
3
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Pin Configurations
Table 2
SOT-23-5
Top view
5
1
Pin No. Pin Name
4
2
1
2
3
4
5
OUT
VSS
VM
VIN
CPOUT
Pin Description
Output pin (step-up DC-DC converter connection pin)
GND pin
Step-up DC-DC converter output voltage monitor pin
Power supply input pin
Startup capacitor connection pin
3
Figure 2
Absolute Maximum Ratings
Table 3
(Ta = 25°C unless otherwise specified)
Parameter
VIN pin voltage
CPOUT pin voltage
OUT pin voltage
VM pin voltage
Power dissipation
Symbol
Absolute Maximum Rating
Unit
VIN
VCPOUT
VOUT
VVM
PD
VSS − 0.3 to VSS + 3.3
VSS − 0.3 to VSS + 3.3
VSS − 0.3 to VSS + 3.3
VSS − 0.3 to VSS + 3.3
300 (When not mounted on board)
600*1
−40 to +85
−40 to +125
V
V
V
V
mW
mW
°C
°C
Operating ambient temperature
Topr
Storage temperature
Tstg
*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
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.
Power Dissipation (PD) [mW]
700
600
500
400
300
200
100
0
0
100
150
50
Ambient Temperature (Ta) [°C]
Figure 3 Power Dissipation of Package (When Mounted on Board)
4
Seiko Instruments Inc.
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Electrical Characteristics
Table 4
(Ta = 25°C unless otherwise specified)
Parameter
Discharge start
*1
voltage
Discharge stop
*2
voltage
Symbol
Conditions
VCPOUT1
VIN = 0.35 V
VCPOUT2
VCPOUT1(S) = 1.8 V
VCPOUT1(S) = 2.0 V
VCPOUT1(S) = 2.2 V
VCPOUT1(S) = 2.4 V
Operating input
*3
voltage
VIN
Oscillation start
VST
voltage
Discharge
control switch
RM1
resistance
Discharge start
tOUT
delay time*4
Discharge start
ΔVCPOUT1
voltage
temperature
ΔTa • VCPOUT1
coefficient
ISS
Current
consumption
during operation
Current
ISSS
consumption
during shutdown
Min.
Typ.
VCPOUT1(S)
VCPOUT1(S)
− 0.1
VCPOUT1
−
− 0.60
VCPOUT1
−
− 0.67
VCPOUT1
−
− 0.74
VCPOUT1
−
− 0.80
VCPOUT1(S) = 1.8 to 2.4 V,
Ta = −40 to +85°C
VCPOUT1(S) = 1.8, 2.0 V,
Ta = −30 to +60°C
Not externally connected, voltage
applied to VIN
Max.
VCPOUT1(S)
+ 0.1
VCPOUT1
− 0.33
VCPOUT1
− 0.33
VCPOUT1
− 0.33
VCPOUT1
− 0.33
Unit
Measurement
Circuit
V
1
V
1
V
1
V
1
V
1
0.35
−
3.0
V
2
0.30
−
3.0
V
2
−
−
0.3
V
−
VCPOUT = 1.8 to 2.4 V,
IOUT = 3 mA
−
34
100
Ω
3
VIN = 0.35 V, CCPOUT = 10 μF
−
7
25
s
2
Ta = −40 to +85°C
−
±150
±550
ppm/°C
−
VIN = 0.3 V, VCPOUT = 0 V
VIN = 0.6 V, VCPOUT = 0 V
VIN = 1.0 V, VCPOUT = 0 V
VIN = 0.3 V, VCPOUT = 0 V, VVM = 3.0 V
VIN = 0.6 V, VCPOUT = 0 V, VVM = 3.0 V
VIN = 1.0 V, VCPOUT = 0 V, VVM = 3.0 V
VIN = 2.0 V, VCPOUT = 0 V, VVM = 3.0 V
−
−
−
−
−
−
−
0.1
0.5
1.2
−
−
−
−
0.5
1.5
3.0
0.6
0.7
0.7
0.8
mA
mA
mA
μA
μA
μA
μA
4
4
4
5
5
5
5
VOFF(S)
VOFF(S)
Shutdown
VOFF
VOFF(S)
V
6
VIN = 0.3 V, VCPOUT = 0 V
*5
voltage
− 0.1
+ 0.1
Shutdown
ΔVOFF
voltage
Ta = −40 to +85°C
−
±150
±550
ppm/°C
−
temperature
ΔTa • VOFF
coefficient
Discharge
VIN = VCPOUT = 0 V,
ILEAK
control switch
0.1
7
−
−
μA
*6
V
OUT = VVM = 3.0 V
leak current
VM pin input
IVM
1.0
1.9
8
VVM = 3.0 V
−
μA
current
Oscillation
350
kHz
fOSC
VIN = 0.3 V
−
−
−
frequency
*1. VCPOUT1 : Actual discharge start voltage value, VCPOUT1(S) : Discharge start voltage setting value
*2. Voltage at which discharge to the OUT pin stops
*3. Input voltage required to start discharge to the OUT pin from the startup capacitor
*4. Delay time from when power is input to the VIN pin until the electric charge of the startup capacitor is discharged to the
OUT pin
*5. VOFF : Actual shutdown voltage value (VM pin voltage value at which shutdown actually occurs)
VOFF(S) : Shutdown voltage setting value (VM pin voltage setting value at which shutdown occurs)
VOFF(S) is automatically set to VCPOUT1(S) + 0.1 V.
*6. Current that flows into the IC from the OUT pin due to the off-leak current of the discharge control switch
Caution The voltage that is input to the connected step-up DC-DC converter varies according to the consumption
current of the step-up DC-DC converter and the power smoothing capacitor. Set the discharge start
voltage based on thorough evaluation including the temperature characteristics under the actual usage
conditions.
Seiko Instruments Inc.
5
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Measurement Circuits
1.
VIN
CPOUT
VM
OUT
1 MΩ
VSS
1 μF
V
10 μF
Figure 4
2.
VIN
CPOUT
VM
OUT
1 MΩ
VSS
1 μF
V
10 μF
Figure 5
3.
VIN
CPOUT
VM
OUT
IOUT
VSS
V
A
Figure 6
4.
VIN
CPOUT
VM
A
1 μF
OUT
VSS
Figure 7
6
Seiko Instruments Inc.
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
5.
VIN
CPOUT
VM
A
OUT
VSS
Figure 8
6.
VIN
CPOUT
VM
A
OUT
VSS
Figure 9
7.
VIN
CPOUT
VM
OUT
VSS
A
Figure 10
8.
VIN
A
CPOUT
VM
OUT
VSS
Figure 11
Seiko Instruments Inc.
7
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Operation
1. Basic Operation : IC with 2.0 V Discharge Start Voltage
(1)
In the S-882Z Series, when power of 0.3 V or higher is input to the VIN pin, the oscillation circuit starts
operation with that power, and the CLK signal is output from the oscillation circuit.
(2)
The charge pump circuit is driven by this CLK signal, and the power of the VIN pin is converted to the
stepped up electric power in the charge pump circuit.
(3)
The stepped up electric power output from the charge pump circuit is gradually charged to the startup
capacitor (CCPOUT) connected to the CPOUT pin and the voltage of the CPOUT pin gradually rises.
(4)
When the CPOUT pin voltage (VCPOUT) reaches or exceeds the discharge start voltage (VCPOUT1), the output
signal of the comparator (COMP1) changes from high level to low. As a result, the discharge control switch
(M1), which was off, turns on.
(5)
When M1 switches on, the step up electric power charged to CCPOUT is discharged from the OUT pin.
(6)
When VCPOUT declines to the level of the discharge stop voltage (VCPOUT2) as the result of the discharge, M1
switches off, and the discharge is stopped.
(7) When the VM pin voltage (VVM) reaches or exceeds the shutdown voltage (VOFF), the output signal (EN−) of
the comparator (COMP2) changes from low level to high. As a result, the oscillation circuit stops operation
and the shutdown state is entered.
(8) When VVM does not reach VOFF or more, the stepped up electric power from the charge pump circuit is
recharged to CCPOUT. (Retun to the operation specified in (3).)
Caution
When stopping the discharge to OUT pin and recharging a startup capacitor (CCPOUT), CCPOUT is
needed to be charged until CPOUT pin voltage (VCPOUT) is lowered less than discharge stop
voltage (VCPOUT2). In this case, set the condition as follows:
Condition: Out pin voltage (VOUT) VDDL + 0.2 V
• (CCPOUT + CVDD) > 2tS • IVDD
CCPOUT > 10CVDD
VCPOUT1 : Discharge start voltage value of S-882Z Series (unit : V)
CCPOUT : Capacitance value of startup capacitor (unit : μF)
10
CVDD :
Capacitance value of power smoothing capacitor for step-up DC-DC converter (unit : μF)
IVDD :
Consumption current value of step-up DC-DC converter (unit : mA)
VDDL :
Minimum operation voltage of step-up DC-DC converter (unit : V)
tS :
Step-up DC-DC converter startup time ≅ Soft start time (unit : ms)
Seiko Instruments Inc.
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
If the Schottky diode (SD1) has a large reverse current or if a pull-down resistor is added to the OUT pin of the
S-882Z Series, add the current value generated from these to the current consumption (IVDD) of the step-up
DC-DC converter.
Moreover, if a Schottky diode is added between the OUT pin of the S-882Z Series and the power supply pin (VDD
pin) of the step-up DC-DC converter, set VCPOUT1 so that it is higher by the amount corresponding to the forward
drop voltage (VF) of the added Schottky diode in comparison to the discharge start voltage value (VCPOUT1)
obtained with the above described conditional expression.
Cautions 1.
The S-882Z Series can start up the step-up DC-DC converter more reliably as the discharge
start voltage value (VCPOUT1) and the startup capacitor value (CCPOUT) are larger. However,
note that the time from when the input power is input until the step-up DC-DC converter
starts becomes longer in this case.
2. In the S-882Z Series, CCPOUT can be more lowered as VCPOUT1 is higher, but note that if VCPOUT1
≥ 2.2 V, the minimum value of the operation input voltage (the minimum input voltage value
required for power to be output from the OUT pin of the S-882Z Series) rises from 0.3 V to
0.35 V (refer to Table 6).
Table 6
Discharge Start Voltage
Value
Minimum Operation Input
Voltage Value
Temperature Range
1.8, 2.0 V
1.8 to 2.4 V
0.3 V
0.35 V
−30 to +60°C
−40 to +85°C
Caution The above connection diagram and constant will not guarantee
successful operation. Perform thorough evaluation using the actual
application to set the constant.
Standard Circuit
CCPOUT
CPOUT
VIN
OUT
S-882Z Series
VSS
VM
Figure 15
Caution
The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Seiko Instruments Inc.
11
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Example of Connection with Step-up DC-DC Converter
The following are the connection examples based on the set condition.
The symbols used in the connection diagram are described in Table 7 below.
Table 7
Symbol
SD1
CVDD
SD2, ROUT
R1, R2
1.
Description
A Schottky diode for preventing a voltage decline in the VDD pin due to output capacitor CL at
step-up DC-DC converter startup.
The power smoothing capacitor of the step-up DC-DC converter. Set the capacitance value so
that CVDD ≤ CCPOUT × 0.1.
A Schottky diode and pull-down resistor to prevent the OUT pin voltage of the S-882Z Series
from exceeding the absolute maximum rated voltage.
Bleeder resistors to prevent the VM pin voltage of the S-882Z Series from exceeding the
absolute maximum rated voltage.
VOUT ≤ 3.0 V, CL ≤ CCPOUT × 0.1, no load
VIN
VOUT
CCPOUT
CPOUT
VIN
VIN
S-882Z Series
Step-up DC-DC converter
VM
VSS
CIN
VDD
OUT
OUT
VSS
CL
Figure 16
2.
VOUT ≤ 3.0 V, CL > CCPOUT × 0.1
VIN
VOUT
SD1
CCPOUT
CPOUT
VIN
CIN
VDD
OUT
VIN
S-882Z Series
VSS
CVDD
Step-up DC-DC converter
VM
VSS
Figure 17
12
Seiko Instruments Inc.
OUT
CL
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
3.
VOUT > 3.0 V, CL ≤ CCPOUT × 0.1, no load
VIN
VOUT
SD2
CCPOUT
CPOUT
VIN
VIN
S-882Z Series
VM
VSS
CIN
VDD
OUT
OUT
Step-up DC-DC converter
ROUT
R1
VSS
R2
CL
Figure 18
4.
VOUT > 3.0 V, CL > CCPOUT × 0.1
VIN
VOUT
SD1
SD2
CVDD
CCPOUT
CPOUT
VIN
CIN
VIN
S-882Z Series
VSS
VDD
OUT
VM
Step-up DC-DC converter
ROUT
OUT
R1
VSS
R2
CL
Figure 19
Caution
The above connection diagram and constant will not guarantee successful operation.
thorough evaluation using the actual application to set the constant.
Seiko Instruments Inc.
Perform
13
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Precautions
• If the consumption current (ISSS) during shutdown needs to be kept at 0.8 μA or lower, set the VM pin voltage (VVM)
so that conditions (1) and (2) below are satisfied.
(1) VVM ≥ VOFF
(2) VIN + 1.0 V ≤ VVM ≤ 3.0 V
• If the discharge start voltage (VCPOUT1) of this IC is lower than the operating voltage of the step-up DC-DC converter
to be started, the step-up DC-DC converter may not start up. When selecting products, fully check them using an
actually mounted model. (Refer to Selection of Product and Startup Capacitor (CCPOUT).)
• Select a capacitor with a sufficiently large capacitance for the startup capacitor. In the case of a capacitor with
insufficient capacitance, the step-up DC-DC converter may not start up. When selecting products, fully check them
using an actually mounted model. (Refer to Selection of Product and Startup Capacitor (CCPOUT).)
• The discharge start delay time (tOUT) is longer according to conditions (1), (2), and (3) below.
longer when these conditions are combined.
Also note it is further
(1) The operating input voltage (VIN) is low.
(2) The discharge start voltage (VCPOUT1) is high.
(3) The startup capacitor value (CCPOUT) is large.
• When stopping the discharge to OUT pin and recharging a startup capacitor (CCPOUT), CCPOUT is needed to be
charged until CPOUT pin voltage (VCPOUT) is lowered less than discharge stop voltage (VCPOUT2). In this case, set
the condition as follows:
Condition: OUT pin voltage (VOUT)< Discharge stop voltage (VCPOUT2)
• Note that the operation to restart a step-up DC-DC converter does not start when CPOUT pin voltage (VCPOUT)
exceeds the discharge stop voltage (VCPOUT2) even if the power-off state is released. This operation restarts if
VCPOUT is lowered than VCPOUT2 by discharge of a start-up capacitor (CCPOUT).
• When designing for mass production using an application circuit described herein, the product deviation and
temperature characteristics should be taken into consideration. SII shall not bear any responsibility for the products
on the circuits described herein.
• Do not apply an electrostatic discharge to this IC that exceeds the performance ratings of the built-in electrostatic
protection circuit.
• SII 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.
14
Seiko Instruments Inc.
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Characteristics (Typical Data)
3.0
2.5
2.0
1.5
1.0
0.5
0
VCPOUT1(S) = 1.8 V
Ta = 25°C
VCPOUT1 VCPOUT2
0
0.5
VCPOUT1, VCPOUT2 [V]
VCPOUT1, VCPOUT2 [V]
1. Discharge Start Voltage (VCPOUT1), Discharge Stop Voltage (VCPOUT2) vs. Input Voltage (VIN)
2.0
1.5
1.0
VIN [V]
3.0
2.5
2.0
1.5
1.0
0.5
0
VCPOUT1(S) = 2.4 V
Ta = 25°C
VCPOUT1
VCPOUT2
0
0.5
1.5
1.0
VIN [V]
2.0
=
- -
°
2. Discharge Start Voltage (VCPOUT1), Discharge Stop Voltage (VCPOUT2) vs. Temperature (Ta)
=
- -
°
3. Discharge Control Switch Resistance (RM1) vs. CPOUT Pin Voltage (VCPOUT)
VCPOUT1(S) = 1.8 V
40
Ta = 85°C
RM1 [Ω]
35
30
Ta = 25°C
25
Ta = −40°C
20
1.7 1.8 1.9 2.0 2.1 2.2 2.3 2.4 2.5
VCPOUT [V]
4. Discharge Start Delay Time (tOUT) vs. Input Voltage (VIN)
VIN £ 0.6 V
CCPOUT = 10 mF
Ta = 25°C
8
4
2
0
1.0
0.8
VCPOUT1(S) = 2.4 V
tOUT [s]
tOUT [s]
6
VIN ³ 0.6 V
CCPOUT = 10 mF
Ta = 25°C
0.6
VCPOUT1(S) = 2.4 V
0.4
0.2
VCPOUT1(S) = 1.8 V
0.25 0.3 0.35 0.4 0.45 0.5 0.55 0.6 0.65
VIN [V]
0
VCPOUT1(S) = 1.8 V
0.5 0.7 0.9 1.1 1.3 1.5 1.7 1.9 2.1
VIN [V]
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15
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
5. Discharge Start Delay Time (tOUT) vs. Startup Capacitor Capacitance Value (CCPOUT)
VIN £ 0.6 V
VCPOUT1(S) = 2.0 V
Ta = 25°C
100
VIN = 0.3 V
60
VIN = 0.35 V
VIN = 0.4 V
VIN = 0.6 V
40
8
tOUT [s]
80
tOUT [s]
10
0
0
100
40
60
80
CCPOUT [mF]
VIN £ 0.6 V
VCPOUT1(S) = 2.4 V
Ta = 25°C
100
20
0
20
tOUT [s]
tOUT [s]
VIN = 0.35 V
VIN = 0.4 V
VIN = 0.6 V
40
100
40
60
80
CCPOUT [mF]
- -
°
=
=
- -
£
=
= m
=
=
°
VIN = 0.6 V
4
VIN = 1.0 V
=
0
20
Seiko Instruments Inc.
VIN = 2.0 V
100
80
40
60
CCPOUT [mF]
³
=
= m
=
=
- -
°
=
40
60
CCPOUT [mF]
VIN ³ 0.6 V
VCPOUT1(S) = 2.4 V
Ta = 25°C
6
0
=
20
VIN = 2.0 V
100
80
2
6. Discharge Start Delay Time (tOUT) vs. Temperature (Ta)
£
=
= m
0
8
60
0
VIN = 1.0 V
10
80
16
4
20
20
VIN = 0.6 V
6
2
0
VIN ³ 0.6 V
VCPOUT1(S) = 2.0 V
Ta = 25°C
=
³
=
= m
=
=
=
- -
°
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
7.
Current Consumption During Operation (ISS) vs. Input Voltage (VIN)
2.0
Ta
= -40°C
Ta
= 25°C
ISS [mA]
1.5
1.0
Ta
= 85°C
0.5
0.0
0.0
1.0
0.5
2.0
1.5
VIN [V]
8.
Current Consumption During Shutdown (ISSS) vs. Input Voltage (VIN)
VVM
VCPOUT1(S)
= 2.0 V
= 1.8 V
0.4
0.4
= 85°C
0.3
0.2
0.1
Ta
= 25°C
Ta
Ta
μA]
μA]
Ta
ISSS [
0.3
ISSS [
= 3.0 V
V
= 1.8 V, 2.0 V, 2.2 V, 2.4 V
VM
VCPOUT1(S)
= -40°C
0.2
0.1
0.0
= 85°C
Ta
= 25°C
Ta
= -40°C
0.0
0.0
1.0
0.5
2.0
1.5
0.0
VIN [V]
0.5
1.0
1.5
2.0
2.5
3.0
VIN [V]
VOFF [V]
9. Shutdown Voltage (VOFF) vs. Input Voltage (VIN)
Ta = 25°C
3.0
2.5
2.0
1.5
1.0
0.5
0.0
VOFF(S) = 2.5 V
VOFF(S) = 1.9 V
0.0
0.5
2.0
1.0
1.5
VIN [V]
10. Shutdown Voltage (VOFF) vs. Temperature (Ta)
VOFF [V]
3.0
VOFF(S) = 2.5 V
2.5
2.0
VOFF(S) = 1.9 V
1.5
1.0
-40 -20
0
20 40
Ta [°C]
60
80
Seiko Instruments Inc.
17
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
11. Discharge Control Switch Leak Current (ILEAK) vs. Input Voltage (VIN)
=
μ
=
°
= - °
=
°
= - °
VOFF(S)
Ta
1.0
Ta
1.0
0.6
Ta
0.4
Ta
= 25°C
= -40°C
IVM [
μA]
0.8
= 2.5 V
= 85°C
0.6
0.4
Ta
= 25°C
= -40°C
0.0
0.0
0.5
1.0
1.5
2.0
2.5
3.0
VVM [V]
Oscillation Frequency (fOSC) vs. Input Voltage (VIN)
= °
0.0
0.5
1.0
1.5
2.0
VVM [V]
0.8
0.2
0.0
VOFF(S)
1.2
Ta
18
= 1.9 V
= 85°C
0.2
13.
VM Pin Input Current (IVM) vs. VM Pin Voltage (VVM)
1.2
μA]
= °
IVM [
= °
μ
12.
=
Seiko Instruments Inc.
2.5
3.0
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Application Circuit Example
Figure 20 shows an application circuit example with targeted values of VIN = 0.3 V, VOUT = 3.0 V, and IOUT = 1 mA.
VIN
VOUT
SD2
L
SD1
CCPOUT
CPOUT
VIN
CIN
OUT
CVDD
CONT
S-882Z Series
VDD
S-8353D30MC
VM
VSS
VOUT
VSS
CL
Figure 20
Table 8
Part Name
Symbol
Manufacturer
S-882Z Series
−
Seiko Instruments Inc.
Step-up DC-DC converter
−
Seiko Instruments Inc.
Inductor
L
Schottky diode
SD1, SD2
Startup capacitor
CCPOUT
Input capacitor
CIN
Output capacitor
CL
Power smoothing capacitor
CVDD
Sumida Corporation
Rohm Co., Ltd.
−
−
−
−
Part No.
S-882Z20-M5T1G
(Discharge start voltage value
setting : 2.0 V)
S-8353D30MC
(Output voltage setting : 3.0 V)
CDRH5D18-101 (100 μH)
RB551V-30
10 μF (ceramic type)
47 μF
33 μF (ESR > 50 mΩ)
1 μF (ceramic type)
Caution The above connection diagram and constant will not guarantee successful operation. Perform
thorough evaluation using the actual application to set the constant.
Seiko Instruments Inc.
19
ULTRA-LOW VOLTAGE OPERATION CHARGE PUMP IC FOR STEP-UP DC-DC CONVERTER STARTUP
Rev.2.0_00
S-882Z Series
Marking Specifications
(1) SOT-23-5
SOT-23-5
Top view
5
4
(1) to (3) :
(4) :
Product code (Refer to Product Name vs. Product Code.)
Lot number
(1) (2) (3) (4)
1
2
3
Product Name vs. Product Code
Product Code
(1)
(2)
(3)
S-882Z18-M5T1x
Q
Y
A
S-882Z20-M5T1x
Q
Y
B
S-882Z22-M5T1x
Q
Y
C
S-882Z24-M5T1x
Q
Y
D
Remark 1.
Please contact our sales office for products with specifications other than the above.
2.
x: G or U
3.
Please select products of environmental code = U for Sn 100%, halogen-free products.
Product Name
20
Seiko Instruments Inc.
2.9±0.2
1.9±0.2
4
5
1
2
+0.1
0.16 -0.06
3
0.95±0.1
0.4±0.1
No. MP005-A-P-SD-1.2
TITLE
No.
SOT235-A-PKG Dimensions
MP005-A-P-SD-1.2
SCALE
UNIT
mm
Seiko Instruments Inc.
4.0±0.1(10 pitches:40.0±0.2)
+0.1
ø1.5 -0
2.0±0.05
+0.2
ø1.0 -0
0.25±0.1
4.0±0.1
1.4±0.2
3.2±0.2
3 2 1
4
5
Feed direction
No. MP005-A-C-SD-2.1
TITLE
SOT235-A-Carrier Tape
No.
MP005-A-C-SD-2.1
SCALE
UNIT
mm
Seiko Instruments Inc.
12.5max.
9.0±0.3
Enlarged drawing in the central part
ø13±0.2
(60°)
(60°)
No. MP005-A-R-SD-1.1
SOT235-A-Reel
TITLE
No.
MP005-A-R-SD-1.1
SCALE
QTY.
UNIT
mm
Seiko Instruments Inc.
3,000
www.sii-ic.com
•
•
•
•
•
•
•
The information described herein is subject to change without notice.
Seiko Instruments Inc. is not responsible for any problems caused by circuits or diagrams described herein
whose related industrial properties, patents, or other rights belong to third parties. The application circuit
examples explain typical applications of the products, and do not guarantee the success of any specific
mass-production design.
When the products described herein are regulated products subject to the Wassenaar Arrangement or other
agreements, they may not be exported without authorization from the appropriate governmental authority.
Use of the information described herein for other purposes and/or reproduction or copying without the
express permission of Seiko Instruments Inc. is strictly prohibited.
The products described herein cannot be used as part of any device or equipment affecting the human
body, such as exercise equipment, medical equipment, security systems, gas equipment, or any apparatus
installed in airplanes and other vehicles, without prior written permission of Seiko Instruments Inc.
The products described herein are not designed to be radiation-proof.
Although Seiko Instruments Inc. exerts the greatest possible effort to ensure high quality and reliability, the
failure or malfunction of semiconductor products may occur. The user of these products should therefore
give thorough consideration to safety design, including redundancy, fire-prevention measures, and
malfunction prevention, to prevent any accidents, fires, or community damage that may ensue.
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