SOT23-5L SOT-89
Features
• 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.
Maturity status link
LDK320
200 mA high accuracy and high PSRR voltage regulator
LDK320
DS11321 - Rev 4 - October 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
1Diagram
Figure 1. Block diagram (fixed version)
VIN
GND
VOUT
OP-AMP
Bias
generator
Bandgap
reference
EN
Thermal
protection
Enable
Current
limit
GIPD030820151330MT
Figure 2. Block diagram (adjustable version)
GIPD030820151331MT
VIN
GND
VOUT
OP-AMP
Bias
generator
Bandgap
reference
EN
Thermal
protection
Enable ADJ
LDK320
Diagrams
DS11321 - Rev 4 page 2/28
2Pin configuration
Figure 3. Pin connection (top view)
SOT-89
SOT23-5L
1
2
34
5
GIPD030820151343MT
SOT-89 (D configuration)
Table 1. Pin description (SOT23-5L)
Pin n° Symbol Function
1 IN Input voltage of the LDO
2 GND Common ground
3 EN Enable pin logic input: low = shutdown, high = active
4 ADJ/NC Adjustable pin on ADJ version, not connected on fixed version
5 OUT Output voltage of the LDO
Table 2. Pin description (SOT-89)
Pin n° Symbol Function
1 OUT Output voltage of the LDO
2 GND Common ground
3 IN Input voltage of the LDO
TAB GND Common ground
Table 3. Pin description (SOT-89, D configuration)
Pin n° Symbol Function
1 GND Common ground
2 IN Input voltage of the LDO
3 OUT Output voltage of the LDO
TAB IN Input voltage of the LDO
LDK320
Pin configuration
DS11321 - Rev 4 page 3/28
3Typical application
Figure 4. Typical application circuits
VI N
G N D
VI
E N
CI N
VO
VO U T
CO U T
L D K 3 2 0
O FF
O N
1 µ F 1 µ F 1 µ F 1 µ F
VI N
G N D
VI
E N
CI N
A D J
VO
VO U T
CO U T
R1
R2
L D K 3 2 0
O FF
O N
F i x e d o u t p u t v o l t a g e v e r s i o n Adjustable output voltage version
VO= V A D J (1+R1/R2)
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Note: Adjustable version and enable pin are not available on SOT-89 package.
LDK320
Typical application
DS11321 - Rev 4 page 4/28
4Maximum ratings
Table 4. Absolute maximun ratings
Symbol Parameter Value Unit
VIN DC input voltage - 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 Parameter SOT23-5L SOT-89 Unit
RthJA Thermal resistance junction-ambient 160 110 °C/W
RthJC Thermal resistance junction-case 68 15 °C/W
LDK320
Maximum ratings
DS11321 - Rev 4 page 5/28
5Electrical 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 Parameter Test conditions Min. Typ. Max. Unit
VIN Operating input voltage 2.5 18 V
VOUT
VOUT accuracy
TJ = 25 °C -2 2 %
-40 °C < TJ < 125 °C -3 3 %
VOUT accuracy, LDK320A
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,
VOUT ≤ 2 V 10 15 mV
IOUT = 1 mA to 200 mA,
VOUT > 2 V 0.001 0.003 %/mA
VDROP Dropout voltage (1)
IOUT = 100 mA,
VOUT = 3.3 V 100
IOUT = 200 mA, VOUT = 3.3 V
40 °C < TJ < 125 °C 200 350 mV
eNOutput noise voltage
10 Hz to 100 kHz,
IOUT = 10 mA 63 μVRMS/V
SVR Supply voltage rejection
f = 120 Hz, IOUT = 10 mA,
VOUT = 3.3 V 88
dB
f = 1 kHz IOUT = 10 mA,
VOUT = 3.3 V 65
f = 10 kHz, IOUT= 10 mA
VOUT = 3.3 V 48
IQQuiescent current
VOUT +1 V VIN 18 V,
IOUT = 0 mA,
-40 °C < TJ < 125 °C
60 90
μA
VIN = VOUT +1 V IOUT = 200 mA,
-40 °C < TJ < 125 °C 70 100
VIN input current in OFF mode:
VEN = GND TJ = 25 °C 0.2 1
ISC Short-circuit current
RL = 0 330
mA
RL = 0, VIN = 16 V 200
LDK320
Electrical characteristics
DS11321 - Rev 4 page 6/28
Symbol Parameter Test conditions Min. Typ. Max. Unit
VEN
Enable input logic low
VIN = 2.5 V to 18 V,
-40 °C < TJ < 125 °C 0.4
V
Enable input logic high
VIN = 2.5 V to 18 V,
-40 °C < TJ < 125 °C 1.2
IEN Enable pin input current VEN = VIN 0.1 100 nA
TSHDN
Thermal shutdown 160
°C
Hysteresis 20
COUT Output capacitor Capacitance (see
Section 6 Typical characteristics)1 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.
Table 7. LDK320 electrical characteristics (ADJ version)
Symbol Parameter Test conditions Min. Typ. Max. Unit
VIN Operating input voltage 2.5 18 V
VADJ
Adjustable voltage TJ = 25 °C 1.185 V
Adjustable voltage accuracy
TJ = 25 °C -2 +2
%
40 °C < TJ < 125 °C -3 +3
Adjustable voltage,
LDK320A TJ = 25 °C 1.2 V
Adjustable voltage accuracy,
LDK320A
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
VDROP Dropout voltage (1)
IOUT = 100 mA, VOUT = 3.3 V 100
mV
IOUT = 200 mA, VOUT = 3.3 V
40 °C < TJ < 125 °C 200 350
eNOutput noise voltage 10 Hz to 100 kHz IOUT = 10 mA 60 μVRMS
IADJ Adjust pin current 1 μA
SVR Supply voltage rejection
f = 120 Hz IOUT = 10 mA,
VOUT = VADJ
83
dB
f = 1 kHz IOUT = 10 mA,
VOUT = VADJ
73
f = 10 kHz IOUT = 10 mA,
VOUT = VADJ
58
LDK320
Electrical characteristics
DS11321 - Rev 4 page 7/28
Symbol Parameter Test conditions Min. Typ. Max. Unit
IQQuiescent current
VOUT +1 V ≤ VIN ≤ 18 V,
IOUT = 0 mA,
-40 °C < TJ < 125 °C
50 90
μA
VIN = VOUT + 1 V,
IOUT = 200 mA,
-40 °C < TJ < 125 °C
60 100
VIN input current in OFF mode:
VEN = GND, TJ = 25 °C 0.2 1
ISC Short-circuit current
RL = 0 330
mA
RL = 0, VIN = 16 V 200
VEN
Enable input logic low
VIN = 2.5 V to 18 V,
-40 °C < TJ < 125 °C 0.4
V
Enable input logic high
VIN = 2.5 V to 18 V,
-40 °C < TJ < 125 °C 1.2
IEN Enable pin input current VEN = VIN 0.1 100 nA
TSHDN
Thermal shutdown 160
°C
Hysteresis 20
COUT Output capacitor Capacitance (see
Section 6 Typical characteristics)1 22 μF
LDK320
Electrical characteristics
DS11321 - Rev 4 page 8/28
6Typical characteristics
Unless otherwise specified: TJ = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 μF.
Figure 5. Output voltage vs. temperature (VIN = 2.5 V,
VOUT = VADJ, IOUT = 1 mA)
1.14
1.16
1.18
1.2
1.22
1.24
-40 -25 0 25 55 85 125
Output voltage [V]
Temperature [ °C]
GIPD040820151207MT
Figure 6. Output voltage vs. temperature (VIN = 2.5 V,
VOUT = VADJ, IOUT = 200 mA)
1.14
1.16
1.18
1.2
1.22
1.24
-40 -25 0 25 55 85 125
Output voltage [V]
Temperature [ °C]
GIPD040820151208MT
1.14
1.16
1.18
1.2
1.22
1.24
-40 -25 0 25 55 85 125
Output Voltage [V]
Temperature [ °C]
Figure 7. Output voltage vs. temperature (VIN = 4.3 V,
VOUT = 3.3 V, IOUT = 1 mA)
GIPD040820151209MT
3.27
3.29
3.31
3.33
3.35
3.37
-40 -25 0 25 55 85 125
Output Voltage [V]
Temperature [ °C]
Figure 8. Output voltage vs. temperature (VIN = 4.3 V,
VOUT = 3.3 V, IOUT = 200 mA)
GIPD040820151210MT
3.27
3.29
3.31
3.33
3.35
3.37
-40 -25 0 25 55 85 125
Output Voltage [V]
Temperature [ °C]
LDK320
Typical characteristics
DS11321 - Rev 4 page 9/28
Figure 9. Line regulation vs. temperature (VIN = 4.3 to
18 V, VOUT = 3.3 V, IOUT = 1 mA)
GIPD040820151211MT
0
0.05
0.1
0.15
0.2
0.25
0.3
-40 -25 0 25 55 85 125
Line Regulation [% / V]
Temperature [ °C]
Figure 10. Line regulation vs. temperature (VIN = 2.5 to
18 V, VOUT = VADJ, IOUT = 1 mA)
GIPD040820151212MT
0
0.05
0.1
0.15
0.2
0.25
0.3
-40 -25 0 25 55 85 125
Line Regulation [% / V]
Temperature [ °C]
Figure 11. Load regulation vs. temperature (VIN = 4.3 V,
VOUT = 3.3 V, IOUT = 1 to 200 mA)
GIPD040820151213MT
0
0.002
0.004
0.006
0.008
0.01
-40 -25 0 25 55 85 125
Load Regulation [% / mA]
Temperature [ °C]
Figure 12. Load regulation vs. temperature (VIN = 2.5 V,
VOUT = VADJ, IOUT = 1 to 200 mA)
GIPD040820151214MT
0
0.001
0.002
0.003
0.004
0.005
-40 -25 0 25 55 85 125
Load Regulation [% / mA]
Temperature [ °C]
Figure 13. Enable thresholds vs. temperature
(IOUT = 1 mA)
GIPD040820151215MT
0.3
0.4
0.5
0.6
0.7
0.8
0.9
1
-40 -25 0 25 55 85 125
VEN Enable [V]
Temperature [ °C]
VENL VENH
Figure 14. Dropout voltage vs. temperature
0
25
50
75
100
125
150
175
200
225
250
275
300
-40 -25 0 25 55 85 125
VDROP
Temperature [ °C]
IOUT =100mA
IOUT =200mA
[mV]
GIPD040820151216MT
LDK320
Typical characteristics
DS11321 - Rev 4 page 10/28
Figure 15. Quiescent current vs. input voltage
(IOUT = 1 mA)
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0
10
20
30
40
50
60
70
80
90
100
110
120
2.5 10 18
Iq [uA]
VIN [V]
T=-40°C
T=25°C
T=125°C
Figure 16. Quiescent current vs. temperature (IOUT = 1
mA)
GIPD040820151218MT
0
10
20
30
40
50
60
70
80
90
100
-40 -25 0 25 55 85 125
Iq [uA]
Temperature [°C]
VIN =4.3V
VIN =10V
VIN =18V
Figure 17. Quiescent current vs. output current
(VIN = 4.3 V)
GIPD040820151219MT
0
10
20
30
40
50
60
70
80
90
100
1 100 200
Iq [uA]
IOUT [mA]
T=-40°C
T=25°C
T=125°C
Figure 18. Quiescent current vs. temperature
(IOUT = 200 mA)
GIPD040820151220MT
0
10
20
30
40
50
60
70
80
90
100
-40 -25 0 25 55 85 125
Iq [uA]
Temperature [°C]
VIN =4.3V
Figure 19. Off-state current vs. temperature Figure 20. Short-circuit current vs. temperature
(VIN = 4.3 V)
GIPD040820151222MT
0.2
0.22
0.24
0.26
0.28
0.3
0.32
0.34
0.36
0.38
0.4
-40 -25 0 25 55 85 125
ISC
Temperature [°C]
LDK320
Typical characteristics
DS11321 - Rev 4 page 11/28
Figure 21. Dropout voltage vs. IOUT
GIPD040820151223MT
0
100
200
300
400
500
1 100 200
VDROP [mV]
IOUT [mA]
T=-40°C
T=25°C
T=125°C
Figure 22. Short-cicuit current vs. drop voltage
0
0.05
0.1
0.15
0.2
0.25
0.3
0.35
0.4
0 2 4 6 8 10 12 14 16 18 20
ISC [A]
VDROP [V]
GIPD040820151224MT
Figure 23. SVR vs. frequency
GIPD040820151225MT
0
10
20
30
40
50
60
70
80
90
100
100 1000 10000 100000
SVR [dB]
Frequency [Hz]
Vout=3.3V
Vout=Vadj
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
Figure 24. Output noise spectral density
GIPD040820151226MT
0
5
10
15
20
10.0 100.0 1000.0 10000.0 100000.0
eN [uV/SQRT(Hz)]
Frequency [Hz]
Vout=Vadj
Vout=3.3V
VIN = VOUT+1 V, IOUT =10 mA, CIN = COUT = 1μ F, T = 25 °C
Figure 25. Stability plan (VOUT = 3.3 V)
GIPD040820151227MT
0.01
0.1
1
1 2.2 4.7 10 22
ESR@100 KHz [Ω]
COUT [uF] (nominal value)
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
Figure 26. Stability plan (VOUT = VADJ)
GIPD040820151228MT
0.01
0.1
1
1 2.2 4.7 10 22
ESR@100KHz [Ω]
COUT [uF] (nominal value)
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
LDK320
Typical characteristics
DS11321 - Rev 4 page 12/28
Figure 27. Startup with enable (VOUT = 3.3 V)
GIPD040820151229MT
Ch1=VEN
Ch2=VOUT
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)
GIPD040820151230MT
Ch1=VEN
Ch2=VOUT
VIN = 18 V, VEN = from 0 to Vin, IOUT =200 mA, CIN = COUT =1 μF trise = tfall = 1 μs
Figure 29. Turn-on time (VOUT = 3.3 V)
GIPD040820151231MT
Ch1=VIN
Ch2=VOUT
VIN = VEN = from 0 to 4.3 V, IOUT = 200 mA, CIN = COUT = 1 μF, Trise = 1 μs
Figure 30. Turn-on time (VOUT = VADJ)
GIPD040820151232MT
Ch1=VIN
Ch2=VOUT
VIN = VEN = from 0 to 18 V, IOUT = 200 mA VOUT = VREF, CIN = COUT = 1 μF Trise = 5 μs
Figure 31. Line transient (VOUT = 3.3 V, rise)
GIPD040820151233MT
Ch1=VIN
Ch2=VOUT
VIN = VEN = from 4.3 to 8.3 V, IOUT = 10 mA, CIN = COUT = 1 μF Trise = 5 μs
Figure 32. Line transient (VOUT = 3.3 V, fall)
GIPD040820151234MT
Ch2=VOUT
Ch1=VIN
VIN = VEN = from 4.3 to 8.3 V, IOUT =10 mA, CIN = COUT =1 μF Tfall = 5 μs
LDK320
Typical characteristics
DS11321 - Rev 4 page 13/28
Figure 33. Load transient (VOUT = 3.3 V, rise)
GIPD040820151236MT
Ch4=IOUT
Ch2=VOUT
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)
C h 4=IO U T
C h 1=VO U T
GIPD040820151237bMT
VIN = VEN = 2.5 V, IOUT = from 1 to 200 mA, CIN = COUT = 1 μF Trise - Tfall = 5 μs
LDK320
Typical characteristics
DS11321 - Rev 4 page 14/28
7Package 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.
LDK320
Package information
DS11321 - Rev 4 page 15/28
7.1 SOT23-5L package information
Figure 35. SOT23-5L package outline
Table 8. SOT23-5L package mechanical data
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 0.09 0.20
D 2.95
E 1.60
e 0.95
H 2.80
L 0.30 0.60
θ 0° 8°
LDK320
SOT23-5L mechanical data
DS11321 - Rev 4 page 16/28
Figure 36. SOT23-5L recommended footprint
Note: Dimensions are in mm
LDK320
SOT23-5L mechanical data
DS11321 - Rev 4 page 17/28
7.2 SOT23-5L packing information
Figure 37. SOT23-5L tape and reel outline
Bo
Ko Ao
Po
P
D
AN
T
Table 9. SOT23-5L tape and reel mechanical data
Dim.
mm
Min. Typ. Max.
A 180
C 12.8 13.0 13.2
D 20.2
N 60
T 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
LDK320
SOT23-5L packing information
DS11321 - Rev 4 page 18/28
7.3 SOT-89 package information
Figure 38. SOT-89 package outline
7098166_REV_F
LDK320
SOT-89 package information
DS11321 - Rev 4 page 19/28
Table 10. SOT-89 mechanical data
Dim.
mm
Min. Typ. 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 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 0.89 120
R 0.25
β 90°
LDK320
SOT-89 package information
DS11321 - Rev 4 page 20/28
Figure 39. SOT-89 recommended footprint
Footprint
LDK320
SOT-89 package information
DS11321 - Rev 4 page 21/28
7.4 SOT-89 packing information
Figure 40. SOT-89 carrier tape outline
7111762_5
Table 11. SOT-89 carrier tape mechanical data
Dim.
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
LDK320
SOT-89 packing information
DS11321 - Rev 4 page 22/28
8Ordering information
Table 12. Order code
SOT23-5L SOT-89 (D
configuration) SOT-89 Accuracy (%) Output voltage
LDK320AM-R 0.5
ADJ
LDK320M-R 2
LDK320AM12R (1) 0.5
1.2
LDK320M12R (1) 2
LDK320AM15R (1) 0.5
1.5
LDK320M15R (1) 2
LDK320AM18R (1) 0.5
1.8
LDK320M18R (1) 2
LDK320AM25R (1) 0.5
2.5
LDK320M25R (1) 2
LDK320AM30R LDK320ADU30R (1) 0.5
3
LDK320M30R 2
LDK320AM33R LDK320ADU33R 0.5
3.3
LDK320M33R 2
LDK320AM36R (1) 0.5
3.6
LDK320M36R (1) 2
LDK320AM50R LDK320ADU50R LDK320AU50R 0.5
5
LDK320M50R 2
LDK320AM120R (1) LDK320ADU120R (1) 0.5
12
LDK320M120R (1) 2
1. Available on request.
LDK320
Ordering information
DS11321 - Rev 4 page 23/28
Revision history
Table 13. Document revision history
Date Revision Changes
16-Nov-2015 1 First release.
01-Jun-2016 2
Document status promoted from preliminary data to production data.
Updated title and features in cover page.
Updated Section 8: “Ordering information”.
Minor text changes.
05-Jul-2017 3 Updated Section 8: "Ordering information".
Minor text changes.
09-Oct-2018 4
Updated ΔVOUT test condition in Table 6. LDK320 electrical characteristics (fixed
output version).
Added new order code LDK320AU50R in Table 12. Order code.
LDK320
DS11321 - Rev 4 page 24/28
Contents
1Diagram ...........................................................................2
2Pin configuration ..................................................................3
3Typical application.................................................................4
4Maximum ratings ..................................................................5
5Electrical characteristics...........................................................6
6Typical characteristics .............................................................9
7Package information..............................................................15
7.1 SOT23-5L package information..................................................16
7.2 SOT23-5L packing information ..................................................17
7.3 SOT-89 package information ....................................................18
7.4 SOT-89 packing information ....................................................21
8Ordering information .............................................................23
Revision history .......................................................................24
Contents ..............................................................................25
List of tables ..........................................................................26
List of figures..........................................................................27
LDK320
Contents
DS11321 - Rev 4 page 25/28
List of tables
Table 1. Pin description (SOT23-5L) .............................................................3
Table 2. Pin description (SOT-89)...............................................................3
Table 3. Pin description (SOT-89, D configuration) ...................................................3
Table 4. Absolute maximun ratings ..............................................................5
Table 5. Thermal data.......................................................................5
Table 6. LDK320 electrical characteristics (fixed output version) ..........................................6
Table 7. LDK320 electrical characteristics (ADJ version) ...............................................7
Table 8. SOT23-5L package mechanical data ..................................................... 16
Table 9. SOT23-5L tape and reel mechanical data .................................................. 18
Table 10. SOT-89 mechanical data.............................................................. 20
Table 11. SOT-89 carrier tape mechanical data ..................................................... 22
Table 12. Order code ....................................................................... 23
Table 13. Document revision history ............................................................. 24
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List of figures
Figure 1. Block diagram (fixed version) ..........................................................2
Figure 2. Block diagram (adjustable version) ......................................................2
Figure 3. Pin connection (top view) .............................................................3
Figure 4. Typical application circuits ............................................................4
Figure 5. Output voltage vs. temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 1 mA) ............................9
Figure 6. Output voltage vs. temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 200 mA) ..........................9
Figure 7. Output voltage vs. temperature (VIN = 4.3 V, VOUT = 3.3 V, IOUT = 1 mA) ............................9
Figure 8. Output voltage vs. temperature (VIN = 4.3 V, VOUT = 3.3 V, IOUT = 200 mA) ..........................9
Figure 9. Line regulation vs. temperature (VIN = 4.3 to 18 V, VOUT = 3.3 V, IOUT = 1 mA) ...................... 10
Figure 10. Line regulation vs. temperature (VIN = 2.5 to 18 V, VOUT = VADJ, IOUT = 1 mA) ....................... 10
Figure 11. Load regulation vs. temperature (VIN = 4.3 V, VOUT = 3.3 V, IOUT = 1 to 200 mA) ..................... 10
Figure 12. Load regulation vs. temperature (VIN = 2.5 V, VOUT = VADJ, IOUT = 1 to 200 mA) ..................... 10
Figure 13. Enable thresholds vs. temperature (IOUT = 1 mA) ........................................... 10
Figure 14. Dropout voltage vs. temperature ...................................................... 10
Figure 15. Quiescent current vs. input voltage (IOUT = 1 mA) ........................................... 11
Figure 16. Quiescent current vs. temperature (IOUT = 1 mA) ........................................... 11
Figure 17. Quiescent current vs. output current (VIN = 4.3 V) ........................................... 11
Figure 18. Quiescent current vs. temperature (IOUT = 200 mA) ......................................... 11
Figure 19. Off-state current vs. temperature....................................................... 11
Figure 20. Short-circuit current vs. temperature (VIN = 4.3 V) .......................................... 11
Figure 21. Dropout voltage vs. IOUT ............................................................ 12
Figure 22. Short-cicuit current vs. drop voltage..................................................... 12
Figure 23. SVR vs. frequency ................................................................ 12
Figure 24. Output noise spectral density ......................................................... 12
Figure 25. Stability plan (VOUT = 3.3 V) ......................................................... 12
Figure 26. Stability plan (VOUT = VADJ) .......................................................... 12
Figure 27. Startup with enable (VOUT = 3.3 V) ..................................................... 13
Figure 28. Startup with enable (VOUT = VADJ)..................................................... 13
Figure 29. Turn-on time (VOUT = 3.3 V) .......................................................... 13
Figure 30. Turn-on time (VOUT = VADJ) .......................................................... 13
Figure 31. Line transient (VOUT = 3.3 V, rise) ...................................................... 13
Figure 32. Line transient (VOUT = 3.3 V, fall) ...................................................... 13
Figure 33. Load transient (VOUT = 3.3 V, rise) ..................................................... 14
Figure 34. Load transient (VOUT = VADJ, fall) ...................................................... 14
Figure 35. SOT23-5L package outline........................................................... 16
Figure 36. SOT23-5L recommended footprint ..................................................... 17
Figure 37. SOT23-5L tape and reel outline ....................................................... 18
Figure 38. SOT-89 package outline ............................................................ 19
Figure 39. SOT-89 recommended footprint ....................................................... 21
Figure 40. SOT-89 carrier tape outline .......................................................... 22
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