LDK320
200 mA high accuracy and high PSRR voltage regulator
Features
SOT-89
SOT23-5L
Maturity status link
LDK320
•
•
•
•
•
•
•
•
•
•
Input voltage from 2.5 to 18 V
Very low-dropout voltage (100 mV typ. @ 100 mA load)
Low quiescent current (typ. 60 μA, 1 μA in off mode)
High PSRR: 88 dB @ 120 Hz
Low noise
Output voltage tolerance: ± 0.5% @ 25 °C (LDK320A) or ± 2% 25 °C
Output current up to 200 mA
Wide range of output voltages available on request: fixed from 1.2 V to 12 V with
100 mV step and adjustable
Logic-controlled electronic shutdown
Compatible with ceramic capacitor COUT = 1 μF
•
•
•
Current, SOA and thermal protections
Available in SOT23-5L and SOT-89 packages
Temperature range: -40 °C to 125 °C
Applications
•
•
•
•
•
DSC
TV
BD, DVD
PC
Industrial
Description
The LDK320 is a low drop voltage regulator, which provides a maximum output
current of 200 mA from an input voltage in the range of 2.5 V to 18 V, with a typical
dropout voltage of 100 mV.
It is stabilized with a ceramic capacitor on the output.
The very good dynamic characteristic, combined with low drop voltage and low
quiescent current make it suitable for low power battery-powered applications.
The enable logic control function allows the LDK320 to be in shutdown mode by
consuming a total current lower than 1 μA.
This device also includes a short-circuit current limiting, thermal and SOA
protections.
DS11321 - Rev 9 - April 2022
For further information contact your local STMicroelectronics sales office.
www.st.com
LDK320
Diagram
1
Diagram
Figure 1. Block diagram (fixed version)
VIN
VOUT
Bias
generator
OP-AMP
EN
Enable
Bandgap
reference
Thermal
protection
Current
limit
GND
GIPD030820151330MT
Figure 2. Block diagram (adjustable version)
VIN
VOUT
Bias
generator
OP-AMP
EN
Enable
ADJ
Bandgap
reference
Thermal
protection
Current
limit
GND
DS11321 - Rev 9
page 2/32
LDK320
Pin configuration
2
Pin configuration
Figure 3. Pin connection (top view)
5
1
2
4
3
SOT-89 (D configuration)
SOT-89
SOT23-5L
GIPD030820151343MT
Table 1. Pin description (SOT23-5L)
Pin n°
Symbol
1
IN
2
GND
3
EN
4
ADJ/NC
5
OUT
Function
Input voltage of the LDO
Common ground
Enable pin logic input: low = shutdown, high = active
Adjustable pin on ADJ version, not connected on fixed version
Output voltage of the LDO
Table 2. Pin description (SOT-89)
Pin n°
Symbol
1
OUT
Output voltage of the LDO
2
GND
Common ground
3
IN
TAB
GND
Function
Input voltage of the LDO
Common ground
Table 3. Pin description (SOT-89, D configuration)
DS11321 - Rev 9
Pin n°
Symbol
1
GND
2
IN
3
OUT
TAB
IN
Function
Common ground
Input voltage of the LDO
Output voltage of the LDO
Input voltage of the LDO
page 3/32
LDK320
Typical application
3
Typical application
Figure 4. Typical application circuits
VIN
VI
ON
O FF
EN
VI N
VI
ON
L D K 32 0
CI N
1 µF
VO U T
VO
O FF
CO U T
G ND
1 µF
VO U T
VO
E N L D K 32 0
R1
CI N
1 µF
G ND
CO U T
ADJ
1 µF
R2
VO= V A D J (1+R1/R2)
F ix e d output volta ge ve rs ion
Adjustable output voltage version
GIPD030820151358MT
Note:
DS11321 - Rev 9
Adjustable version and enable pin are not available on SOT-89 package.
page 4/32
LDK320
Maximum ratings
4
Maximum ratings
Table 4. Absolute maximun ratings
Symbol
VIN
Parameter
DC input voltage
Value
Unit
- 0.3 to 20
V
VOUT
DC output voltage
- 0.3 to VI + 0.3
V
VEN
Enable input voltage
- 0.3 to VI + 0.3
V
VADJ
ADJ pin voltage
- 0.3 to 2
V
IOUT
Output current
Internally limited
mA
PD (1)
Power dissipation
Internally limited
mW
TSTG
Storage temperature range
- 65 to 150
°C
TOP
Operating junction temperature
range
- 40 to 125
°C
1. Maximum power dissipation must be calculated by taking into account the package and thermal performance.
Note:
Absolute maximum ratings are those values beyond which damage to the device may occur. Functional
operation under these conditions is not implied. All values are referred to GND.
Table 5. Thermal data
Symbol
DS11321 - Rev 9
Parameter
SOT23-5L
SOT-89
Unit
RthJA
Thermal resistance junction-ambient
160
110
°C/W
RthJC
Thermal resistance junction-case
68
15
°C/W
page 5/32
LDK320
Electrical characteristics
5
Electrical characteristics
TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 μF, IOUT = 1 mA, VEN = VIN, unless otherwise specified.
Table 6. LDK320 electrical characteristics (fixed output version)
Symbol
VIN
Parameter
Max.
Unit
2.5
18
V
TJ = 25 °C
-2
2
%
-40 °C < TJ < 125 °C
-3
3
%
TJ = 25 °C
-0.5
0.5
%
-40 °C < TJ < 125 °C
-1.5
1.5
%
0.001
0.05
%/V
10
15
mV
0.001
0.003
%/mA
10
25
mV
0.001
0.004
%/mA
350
mV
Operating input voltage
VOUT accuracy
VOUT
VOUT accuracy, LDK320A
ΔVOUT
Test conditions
Static line regulation
VOUT +1 V ≤ VIN ≤ 18 V
IOUT = 1 mA to 200 mA,
ΔVOUT
Static load regulation
(SOT23-5L)
VOUT ≤ 2 V
IOUT = 1 mA to 200 mA,
VOUT > 2 V
IOUT = 1 mA to 200 mA,
ΔVOUT
Static load regulation
(SOT-89)
VOUT ≤ 2 V
IOUT = 1 mA to 200 mA,
VOUT > 2 V
IOUT = 100 mA,
VDROP
Dropout voltage (1)
VOUT = 3.3 V
IOUT = 200 mA, VOUT = 3.3 V
40 °C < TJ < 125 °C
eN
Output noise voltage
10 Hz to 100 kHz,
IOUT = 10 mA
f = 120 Hz, IOUT = 10 mA,
VOUT = 3.3 V
SVR
Supply voltage rejection
f = 1 kHz IOUT = 10 mA,
VOUT = 3.3 V
f = 10 kHz, IOUT= 10 mA
VOUT = 3.3 V
Min.
Typ.
100
200
μVRMS/V
63
88
65
dB
48
VOUT +1 V VIN 18 V,
IOUT = 0 mA,
60
90
70
100
VIN input current in OFF mode:
VEN = GND TJ = 25 °C
0.2
1
RL = 0
330
RL = 0, VIN = 16 V
200
-40 °C < TJ < 125 °C
IQ
Quiescent current
VIN = VOUT +1 V IOUT = 200 mA,
-40 °C < TJ < 125 °C
ISC
DS11321 - Rev 9
Short-circuit current
μA
mA
page 6/32
LDK320
Electrical characteristics
Symbol
Parameter
Enable input logic low
VEN
Enable input logic high
IEN
TSHDN
COUT
Enable pin input current
Test conditions
Min.
Typ.
VIN = 2.5 V to 18 V,
VIN = 2.5 V to 18 V,
-40 °C < TJ < 125 °C
V
1.2
VEN = VIN
0.1
160
Hysteresis
20
Capacitance (see
Section 6 Typical
characteristics)
Unit
0.4
-40 °C < TJ < 125 °C
Thermal shutdown
Output capacitor
Max.
1
100
nA
°C
22
µF
1. Dropout voltage is the input-to-output voltage difference at which the output voltage is 100 mV below its nominal value.
TJ = 25 °C, VIN = 2.5 V, CIN = COUT = 1 μF, IOUT = 1 mA, VEN = VIN, unless otherwise specified.
DS11321 - Rev 9
page 7/32
LDK320
Electrical characteristics
Table 7. LDK320 electrical characteristics (ADJ version)
Symbol
VIN
Parameter
Operating input voltage
Adjustable voltage
Adjustable voltage accuracy
VADJ
Test conditions
Adjustable voltage,
LDK320A
Adjustable voltage accuracy,
LDK320A
Min.
Typ.
2.5
TJ = 25 °C
Max.
Unit
18
V
1.185
V
TJ = 25 °C
-2
+2
40 °C < TJ < 125 °C
-3
+3
TJ = 25 °C
1.2
%
V
TJ = 25 °C
-0.5
+0.5
40 °C < TJ < 125 °C
-1.5
+1.5
%
ΔVOUT
Static line regulation
VOUT + 1 V ≤ VIN ≤ 18 V
0.001
0.05
%/V
ΔVOUT
Static load regulation
IOUT = 1 mA to 200 mA
0.0002
0.003
%/mA
IOUT = 100 mA, VOUT = 3.3 V
VDROP
Dropout voltage
(1)
100
IOUT = 200 mA, VOUT = 3.3 V
200
40 °C < TJ < 125 °C
eN
IADJ
Output noise voltage
10 Hz to 100 kHz IOUT = 10 mA
Adjust pin current
1
μA
83
VOUT = VADJ
Supply voltage rejection
mV
μVRMS
60
f = 120 Hz IOUT = 10 mA,
SVR
350
f = 1 kHz IOUT = 10 mA,
73
VOUT = VADJ
f = 10 kHz IOUT = 10 mA,
dB
58
VOUT = VADJ
VOUT +1 V ≤ VIN ≤ 18 V,
IOUT = 0 mA,
50
90
60
100
VIN input current in OFF mode:
VEN = GND, TJ = 25 °C
0.2
1
RL = 0
330
RL = 0, VIN = 16 V
200
-40 °C < TJ < 125 °C
IQ
Quiescent current
VIN = VOUT + 1 V,
μA
IOUT = 200 mA,
-40 °C < TJ < 125 °C
ISC
Short-circuit current
Enable input logic low
VEN
Enable input logic high
IEN
TSHDN
DS11321 - Rev 9
Enable pin input current
VIN = 2.5 V to 18 V,
0.4
-40 °C < TJ < 125 °C
VIN = 2.5 V to 18 V,
-40 °C < TJ < 125 °C
VEN = VIN
mA
V
1.2
0.1
Thermal shutdown
160
Hysteresis
20
100
nA
°C
page 8/32
LDK320
Electrical characteristics
Symbol
COUT
DS11321 - Rev 9
Parameter
Output capacitor
Test conditions
Capacitance (see
Section 6 Typical
characteristics)
Min.
1
Typ.
Max.
Unit
22
μF
page 9/32
LDK320
Typical characteristics
6
Typical characteristics
Unless otherwise specified: TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 μF.
Figure 6. Output voltage vs. temperature (VIN = 2.5 V,
VOUT = VADJ, IOUT = 200 mA)
1.24
1.24
1.22
1.22
1.2
1.2
Output Voltage
voltage [V]
Output voltage [V]
Figure 5. Output voltage vs. temperature (VIN = 2.5 V,
VOUT = VADJ, IOUT = 1 mA)
1.18
1.16
1.18
1.16
1.14
-40
-25
0
25
55
85
1.14
125
-40
-25
0
Temperature [ °C]
25
55
85
125
Temperature [ °C]
GIPD040820151207MT
Figure 7. Output voltage vs. temperature (VIN = 4.3 V,
VOUT = 3.3 V, IOUT = 1 mA)
GIPD040820151208MT
Figure 8. Output voltage vs. temperature (VIN = 4.3 V,
VOUT = 3.3 V, IOUT = 200 mA)
3.37
3.37
3.35
Output Voltage [V]
Output Voltage [V]
3.35
3.33
3.33
3.31
3.31
3.29
3.29
3.27
-40
3.27
-40
-25
0
25
55
85
125
Temperature [ °C]
GIPD040820151209MT
DS11321 - Rev 9
-25
0
25
55
85
125
Temperature [ °C]
GIPD040820151210MT
page 10/32
LDK320
Typical characteristics
Figure 10. Line regulation vs. temperature (VIN = 2.5 to
18 V, VOUT = VADJ, IOUT = 1 mA)
0.3
0.3
0.25
0.25
Line Regulation [% / V]
Line Regulation [% / V]
Figure 9. Line regulation vs. temperature (VIN = 4.3 to
18 V, VOUT = 3.3 V, IOUT = 1 mA)
0.2
0.15
0.1
0.2
0.15
0.1
0.05
0.05
0
0
-40
-25
0
25
55
85
-40
125
-25
0
25
55
GIPD040820151211MT
Figure 11. Load regulation vs. temperature (VIN = 4.3 V,
VOUT = 3.3 V, IOUT = 1 to 200 mA)
125
GIPD040820151212MT
Figure 12. Load regulation vs. temperature (VIN = 2.5 V,
VOUT = VADJ, IOUT = 1 to 200 mA)
0.01
0.005
0.008
0.004
Load Regulation [% / mA]
Load Regulation [% / mA]
85
Temperature [ °C]
Temperature [ °C]
0.006
0.004
0.002
0.003
0.002
0.001
0
-40
-25
0
25
55
85
0
125
-40
-25
0
Temperature [ °C]
25
55
85
125
Temperature [ °C]
GIPD040820151213MT
GIPD040820151214MT
Figure 13. Enable thresholds vs. temperature
(IOUT = 1 mA)
Figure 14. Dropout voltage vs. temperature
300
1
275
0.9
VENL
250
VENH
225
IOUT =100mA
[mV]
200
0.7
VDROP
VEN Enable [V]
0.8
0.6
IOUT =200mA
175
150
125
100
75
0.5
50
0.4
25
0
-40
0.3
-40
-25
0
25
55
85
125
Temperature [ °C]
GIPD040820151215MT
DS11321 - Rev 9
-25
0
25
55
85
125
Temperature [ °C]
GIPD040820151216MT
page 11/32
LDK320
Typical characteristics
Figure 15. Quiescent current vs. input voltage
(IOUT = 1 mA)
Figure 16. Quiescent current vs. temperature (IOUT = 1
mA)
120
100
110
T=-40°C
100
T=25°C
70
80
60
70
Iq [uA]
Iq [uA]
VIN =10V
VIN =18V
80
T=125°C
90
VIN =4.3V
90
60
50
50
40
40
30
30
20
20
10
10
0
0
2.5
10
-40
18
-25
0
VIN [V]
25
55
85
GIPD040820151217MT
GIPD040820151218MT
Figure 17. Quiescent current vs. output current
(VIN = 4.3 V)
Figure 18. Quiescent current vs. temperature
(IOUT = 200 mA)
100
100
T=-40°C
90
90
VIN =4.3V
T=25°C
80
80
T=125°C
70
70
60
60
Iq [uA]
Iq [uA]
125
Temperature [°C]
50
50
40
40
30
30
20
20
10
10
0
0
1
100
200
-40
-25
0
25
55
85
125
Temperature [°C]
IOUT [mA]
GIPD040820151220MT
GIPD040820151219MT
Figure 19. Off-state current vs. temperature
Figure 20. Short-circuit current vs. temperature
(VIN = 4.3 V)
0.4
0.38
0.36
0.34
ISC
0.32
0.3
0.28
0.26
0.24
0.22
0.2
-40
-25
0
25
Temperature [°C]
DS11321 - Rev 9
55
85
125
GIPD040820151222MT
page 12/32
LDK320
Typical characteristics
Figure 21. Dropout voltage vs. IOUT
Figure 22. Short-cicuit current vs. drop voltage
0.4
500
T=-40°C
0.35
T=25°C
400
0.3
0.25
300
ISC [A]
VDROP [mV]
T=125°C
200
0.2
0.15
0.1
100
0.05
0
0
1
100
0
200
IOUT [mA]
2
4
6
8
10
12
14
VDROP [V]
GIPD040820151223MT
Figure 23. SVR vs. frequency
16
18
20
GIPD040820151224MT
Figure 24. Output noise spectral density
T = 25 °C, IOUT =10 mA, for VOUT = 3.3 V then VIN= 3.8 to 4.3 V, for
VOUT = VADJ then VIN = 2.5 to 3 V
VIN = VOUT+1 V, IOUT =10 mA, CIN = COUT = 1μ F, T = 25 °C
20
100
90
80
Vout=3.3V
Vout=3.3V
eN [uV/SQRT(Hz)]
SVR [dB]
Vout=Vadj
15
Vout=Vadj
70
60
50
40
10
30
5
20
10
0
100
1000
10000
0
10.0
100000
100.0
1000.0
Frequency [Hz]
Figure 25. Stability plan (VOUT = 3.3 V)
ESR@100KHz [Ω]
ESR@100 KHz [ Ω]
1
0.1
0.01
4.7
10
COUT [uF] (nominal value)
22
GIPD040820151227MT
DS11321 - Rev 9
Figure 26. Stability plan (VOUT = VADJ)
IOUT from 10 mA to 0.2 A for VIN = 2.5V, IOUT = 0.18 A for VIN = 18 V, CIN=1 μF, T = 25 °C
IOUT from 10 mA to 0.2 A for VIN = 4.3 V, IOUT = 0.18 A for VIN = 18 V, CIN = 1 μF, T = 25 °C
2.2
100000.0
GIPD040820151226MT
GIPD040820151225MT
1
10000.0
Frequency [Hz]
1
0.1
0.01
1
2.2
4.7
10
22
COUT [uF] (nominal value)
GIPD040820151228MT
page 13/32
LDK320
Typical characteristics
Figure 27. Startup with enable (VOUT = 3.3 V)
VIN = 4.3 V, VEN = from 0 to Vin, IOUT = 200 mA, CIN = COUT = 1 μF trise = tfall = 1 μs
Figure 28. Startup with enable (VOUT = VADJ)
VIN = 18 V, VEN = from 0 to Vin, IOUT =200 mA, CIN = COUT =1 μF trise = tfall = 1 μs
Ch1=VEN
Ch1=VEN
Ch2=VOUT
Ch2=VOUT
GIPD040820151229MT
Figure 29. Turn-on time (VOUT = 3.3 V)
VIN = VEN = from 0 to 4.3 V, IOUT = 200 mA, CIN = COUT = 1 μF, Trise = 1 μs
GIPD040820151230MT
Figure 30. Turn-on time (VOUT = VADJ)
VIN = VEN = from 0 to 18 V, IOUT = 200 mA VOUT = VREF, CIN = COUT = 1 μF Trise = 5 μs
Ch1=VIN
Ch1=VIN
Ch2=VOUT
Ch2=VOUT
GIPD040820151231MT
Figure 31. Line transient (VOUT = 3.3 V, rise)
VIN = VEN = from 4.3 to 8.3 V, IOUT = 10 mA, CIN = COUT = 1 μF Trise = 5 μs
GIPD040820151232MT
Figure 32. Line transient (VOUT = 3.3 V, fall)
VIN = VEN = from 4.3 to 8.3 V, IOUT =10 mA, CIN = COUT =1 μF Tfall = 5 μs
Ch1=VIN
Ch1=VIN
Ch2=VOUT
Ch2=VOUT
GIPD040820151233MT
DS11321 - Rev 9
GIPD040820151234MT
page 14/32
LDK320
Typical characteristics
Figure 33. Load transient (VOUT = 3.3 V, rise)
VIN = VEN = 4.3 V, IOUT = from 1 to 200 mA, CIN = COUT = 1 μF Trise = 5 μs
Figure 34. Load transient (VOUT = VADJ, fall)
VIN = VEN = 2.5 V, IOUT = from 1 to 200 mA, CIN = COUT = 1 μF Trise - Tfall = 5 μs
Ch2=VOUT
Ch4=IOUT
Ch1=VOUT
Ch4=IOUT
GIPD040820151236MT
DS11321 - Rev 9
GIPD040820151237bMT
page 15/32
LDK320
Package information
7
Package information
In order to meet environmental requirements, ST offers these devices in different grades of ECOPACK packages,
depending on their level of environmental compliance. ECOPACK specifications, grade definitions and product
status are available at: www.st.com. ECOPACK is an ST trademark.
7.1
SOT23-5L package information
Figure 35. SOT23-5L package outline (option A)
DS11321 - Rev 9
page 16/32
LDK320
SOT23-5L package information
Table 8. SOT23-5L mechanical data (option A)
Dimensions (mm)
DS11321 - Rev 9
Symbol
Min.
Nom.
Max.
A
-
-
1.25
A1
0.04
-
0.10
A2
1.00
1.10
1.20
b
0.33
-
0.41
b1
0.32
0.35
0.38
c
0.15
-
0.19
c1
0.14
0.15
0.16
D
2.82
2.92
3.02
E
2.60
2.80
3.00
E1
1.50
1.60
1.70
e
0.95 BSC
e1
1.90 BSC
L
0.30
Θ
0°
-
0.60
8°
page 17/32
LDK320
SOT23-5L package information
7.2
SOT23-5L package information
Figure 36. SOT23-5L package outline (option B)
DS11321 - Rev 9
page 18/32
LDK320
SOT23-5L package information
Table 9. SOT23-5L package mechanical data (option B)
Dim.
mm
Min.
Typ.
Max.
A
0.90
1.45
A1
0
0.15
A2
0.90
1.30
b
0.30
0.50
c
0.14
0.20
c1
0.14
0.15
D
2.90 BSC
E
2.80 BSC
E1
1.60 BSC
e
0.95 BSC
e1
1.90 BSC
L
0.30
0.55
L2
0.25
N
5
θ
0.16
0°
8°
Tolerance
aaa
0.15
bbb
0.20
ccc
0.10
ddd
0.20
eee
0.08
Figure 37. SOT23-5L recommended footprint
Note:
DS11321 - Rev 9
Dimensions are in mm
page 19/32
LDK320
SOT23-5L packing information
7.3
SOT23-5L packing information
Figure 38. SOT23-5L tape and reel outline
Table 10. SOT23-5L tape and reel mechanical data
Dim.
mm
Min.
Typ.
A
180
C
12.8
D
20.2
N
60
13.0
T
DS11321 - Rev 9
Max.
13.2
14.4
Ao
3.13
3.23
3.33
Bo
3.07
3.17
3.27
Ko
1.27
1.37
1.47
Po
3.9
4.0
4.1
P
3.9
4.0
4.1
page 20/32
LDK320
SOT-89 package information
7.4
SOT-89 package information
Figure 39. SOT-89 package outline
7098166_REV_F
DS11321 - Rev 9
page 21/32
LDK320
SOT-89 package information
Table 11. SOT-89 mechanical data
Dim.
mm
Min.
Max.
A
1.40
1.60
B
0.44
0.56
B1
0.36
0.48
C
0.35
0.44
C1
0.35
0.44
D
4.40
4.60
D1
1.62
1.83
D3
DS11321 - Rev 9
Typ.
0.90
E
2.29
2.60
e
1.42
1.57
e1
2.92
3.07
H
3.94
4.25
H1
2.70
3.10
K
1°
8°
L
0.89
1.20
R
0.25
β
90°
page 22/32
LDK320
SOT-89 package information
Figure 40. SOT-89 recommended footprint
Footprint
DS11321 - Rev 9
page 23/32
LDK320
SOT-89 packing information
7.5
SOT-89 packing information
Figure 41. SOT-89 carrier tape outline
7111762_5
Figure 42. SOT-89 device orientation
DS11321 - Rev 9
page 24/32
LDK320
SOT-89 packing information
Table 12. SOT-89 carrier tape mechanical data
Dim.
DS11321 - Rev 9
mm
Value
Tolerance
Ao
4.91
± 0.10
Bo
4.52
± 0.10
Ko
1.90
± 0.10
F
5.50
± 0.10
E
1.75
± 0.10
W
12
± 0.30
P2
2
± 0.10
Po
4
± 0.10
P1
8
± 0.10
T
0.30
± 0.10
D
Ø 1.55
± 0.05
D1
Ø 1.60
± 0.10
page 25/32
LDK320
SOT-89 packing information
Figure 43. SOT-89 reel drawing
DS11321 - Rev 9
page 26/32
LDK320
Ordering information
8
Ordering information
Table 13. Order code
SOT-89
SOT23-5L
Marking
Accuracy (%)
LDK320AM-R
ADA
0.5
LDK320M-R
KAD
2
(D configuration)
SOT-89
LDK320AM12R (1)
LDK320M12R
0.5
(1)
2
LDK320AM15R (1)
15A
0.5
LDK320AM18R (1)
18A
0.5
LDK320M18R
K18
2
LDK320AM25R
25A
0.5
LDK320M25R
K25
2
LDK320AM30R
30A
0.5
30
0.5
LDK320M30R
K30
2
LDK320AM33R
33A
0.5
33
0.5
LDK320M33R
K33
2
LDK320AM36R
36A
0.5
LDK320AM50R
50A
0.5
50
0.5
E0
0.5
LDK320M50R
K50
2
LDK320AM120R
120A
0.5
A2
0.5
LDK320ADU30R
LDK320ADU33R
LDK320ADU50R
LDK320AU50R
LDK320ADU120R
LDK320M120R
(1)
Output voltage
ADJ
1.2
1.5
1.8
2.5
3
3.3
3.6
5
12
2
1. Available on request.
DS11321 - Rev 9
page 27/32
LDK320
Revision history
Table 14. Document revision history
Date
Revision
16-Nov-2015
1
Changes
First release.
Document status promoted from preliminary data to production data.
01-Jun-2016
2
Updated title and features in cover page.
Updated Section 8: “Ordering information”.
Minor text changes.
05-Jul-2017
3
09-Oct-2018
4
Updated Section 8: "Ordering information".
Minor text changes.
Updated ΔVOUT test condition in Table 6. LDK320 electrical characteristics (fixed
output version).
Added new order code LDK320AU50R in Table 12. Order code.
DS11321 - Rev 9
28-Oct-2019
5
Added ΔVOUT for SOT-89 in Table 6. LDK320 electrical characteristics (fixed output
version).
23-Jul-2020
6
Updated Figure 2. Block diagram (adjustable version).
10-Nov-2020
7
Updated Table 12. Order code.
12-Nov-2020
8
Added new Marking column in Table 13. Order code.
26-Apr-2022
9
Updated Section 7.2
Added new Section 7.1 SOT23-5L package information
page 28/32
LDK320
Contents
Contents
1
Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2
2
Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
3
Typical application. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4
4
Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .5
5
Electrical characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
6
Typical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .10
7
Package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .16
8
7.1
SOT23-5L package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
7.2
SOT23-5L package information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
7.3
SOT23-5L packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 20
7.4
SOT-89 package information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 21
7.5
SOT-89 packing information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 24
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .27
Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .28
List of tables . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .30
List of figures. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .31
DS11321 - Rev 9
page 29/32
LDK320
List of tables
List of tables
Table 1.
Table 2.
Table 3.
Table 4.
Table 5.
Table 6.
Table 7.
Table 8.
Table 9.
Table 10.
Table 11.
Table 12.
Table 13.
Table 14.
Pin description (SOT23-5L) . . . . . . . . . . . . . . . . . . . .
Pin description (SOT-89). . . . . . . . . . . . . . . . . . . . . .
Pin description (SOT-89, D configuration) . . . . . . . . . .
Absolute maximun ratings . . . . . . . . . . . . . . . . . . . . .
Thermal data. . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
LDK320 electrical characteristics (fixed output version) .
LDK320 electrical characteristics (ADJ version) . . . . . .
SOT23-5L mechanical data (option A) . . . . . . . . . . . .
SOT23-5L package mechanical data (option B) . . . . . .
SOT23-5L tape and reel mechanical data . . . . . . . . . .
SOT-89 mechanical data. . . . . . . . . . . . . . . . . . . . . .
SOT-89 carrier tape mechanical data . . . . . . . . . . . . .
Order code . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Document revision history . . . . . . . . . . . . . . . . . . . . .
DS11321 - Rev 9
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. 3
. 3
. 3
. 5
. 5
. 6
. 8
17
19
20
22
25
27
28
page 30/32
LDK320
List of figures
List of figures
Figure 1.
Figure 2.
Figure 3.
Figure 4.
Figure 5.
Figure 6.
Figure 7.
Figure 8.
Figure 9.
Figure 10.
Figure 11.
Figure 12.
Figure 13.
Figure 14.
Figure 15.
Figure 16.
Figure 17.
Figure 18.
Figure 19.
Figure 20.
Figure 21.
Figure 22.
Figure 23.
Figure 24.
Figure 25.
Figure 26.
Figure 27.
Figure 28.
Figure 29.
Figure 30.
Figure 31.
Figure 32.
Figure 33.
Figure 34.
Figure 35.
Figure 36.
Figure 37.
Figure 38.
Figure 39.
Figure 40.
Figure 41.
Figure 42.
Figure 43.
DS11321 - Rev 9
Block diagram (fixed version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Block diagram (adjustable version) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Pin connection (top view) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Typical application circuits . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output voltage vs. temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 1 mA) . . . . . .
Output voltage vs. temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 200 mA) . . . .
Output voltage vs. temperature (VIN = 4.3 V, VOUT = 3.3 V, IOUT = 1 mA) . . . . . .
Output voltage vs. temperature (VIN = 4.3 V, VOUT = 3.3 V, IOUT = 200 mA) . . . .
Line regulation vs. temperature (VIN = 4.3 to 18 V, VOUT = 3.3 V, IOUT = 1 mA) .
Line regulation vs. temperature (VIN = 2.5 to 18 V, VOUT = VADJ, IOUT = 1 mA) . .
Load regulation vs. temperature (VIN = 4.3 V, VOUT = 3.3 V, IOUT = 1 to 200 mA)
Load regulation vs. temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 1 to 200 mA)
Enable thresholds vs. temperature (IOUT = 1 mA) . . . . . . . . . . . . . . . . . . . . . .
Dropout voltage vs. temperature . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. input voltage (IOUT = 1 mA) . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. temperature (IOUT = 1 mA) . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. output current (VIN = 4.3 V) . . . . . . . . . . . . . . . . . . . . . .
Quiescent current vs. temperature (IOUT = 200 mA) . . . . . . . . . . . . . . . . . . . .
Off-state current vs. temperature. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-circuit current vs. temperature (VIN = 4.3 V) . . . . . . . . . . . . . . . . . . . . .
Dropout voltage vs. IOUT . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Short-cicuit current vs. drop voltage. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SVR vs. frequency . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Output noise spectral density . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stability plan (VOUT = 3.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Stability plan (VOUT = VADJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Startup with enable (VOUT = 3.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Startup with enable (VOUT = VADJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn-on time (VOUT = 3.3 V) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Turn-on time (VOUT = VADJ) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line transient (VOUT = 3.3 V, rise) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Line transient (VOUT = 3.3 V, fall) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load transient (VOUT = 3.3 V, rise) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
Load transient (VOUT = VADJ, fall) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT23-5L package outline (option A) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT23-5L package outline (option B) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT23-5L recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT23-5L tape and reel outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT-89 package outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT-89 recommended footprint . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT-89 carrier tape outline . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT-89 device orientation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
SOT-89 reel drawing . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .
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page 31/32
LDK320
IMPORTANT NOTICE – READ CAREFULLY
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