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LDK320
200 mA high accuracy and high PSRR voltage regulator
Datasheet - production data
Applications
SOT23-5L
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SOT-8 9
DSC
TV
BD, DVD
PC
Industrial
Description
Features
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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 [email protected] 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
June 2016
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.
DocID028460 Rev 2
This is information on a product in full production.
1/25
www.st.com
Contents
LDK320
Contents
1
Diagram ............................................................................................ 3
2
Pin configuration ............................................................................. 4
3
Typical application .......................................................................... 5
4
5
Maximum ratings ............................................................................. 6
Electrical characteristics ................................................................ 7
6
Typical characteristics .................................................................. 10
7
Package information ..................................................................... 16
8
9
2/25
7.1
SOT23-5L package information ...................................................... 16
7.2
SOT23-5L packing information........................................................ 18
7.3
SOT-89 package information .......................................................... 19
7.4
SOT-89 packing information............................................................ 22
Ordering information..................................................................... 23
Revision history ............................................................................ 24
DocID028460 Rev 2
LDK320
1
Diagram
Diagram
Figure 1: Block diagram (fixed version)
Figure 2: Block diagram (adjustable version)
DocID028460 Rev 2
3/25
Pin configuration
2
LDK320
Pin configuration
Figure 3: Pin connection (top view)
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
Function
1
OUT
Output voltage of the LDO
2
GND
Common ground
3
IN
TAB
GND
Input voltage of the LDO
Common ground
Table 3: Pin description (SOT-89, D configuration)
4/25
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
DocID028460 Rev 2
LDK320
3
Typical application
Typical application
Figure 4: Typical application circuits
VIN
VI
ON
OF F
EN
VIN
VI
ON
L DK 320
OF F
CIN
1 µF
VOUT
VO
COUT
1 µF
GND
EN
VOUT
VO
L DK 320
R1
CIN
1µF
COUT
G ND
ADJ
1µF
R2
V O =V AD J (1+R1/R2)
Fix ed output voltage vers ion
Adjustable output voltage vers ion
GIPD030820151358MT
Adjustable version and enable pin are not available on SOT-89 package.
DocID028460 Rev 2
5/25
Maximum ratings
4
LDK320
Maximum ratings
Table 4: Absolute maximun ratings
Symbol
Parameter
VIN
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
Notes:
(1)Maximum
power dissipation must be calculated by taking into account the package and thermal performance.
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
6/25
Parameter
SOT23-5L
SOT-89
Unit
RthJA
Thermal resistance junction-ambient
160
110
°C/W
RthJC
Thermal resistance junction-case
68
15
°C/W
DocID028460 Rev 2
LDK320
5
Electrical characteristics
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
Test conditions
Max.
Unit
2.5
18
V
TJ = 25 °C
-2
2
%
-40 °C < TJ < 125 °C
-3
3
%
Operating input
voltage
VOUT accuracy
VOUT
Min.
Typ.
VOUT accuracy,
LDK320A
TJ = 25 °C
-0.5
0.5
%
-40 °C < TJ < 125 °C
-1.5
1.5
%
VOUT
Static line regulation
VOUT +1 V VIN 18 V
0.001
0.05
%/V
VOUT
Static load
regulation
IOUT = 1mA to 200 mA
0.001
0.003
%/mA
350
mV
VDROP
eN
SVR
IQ
ISC
Dropout voltage (1)
Output noise
voltage
Supply voltage
rejection
Quiescent current
IOUT = 100 mA, VOUT = 3.3 V
100
IOUT = 200 mA,
V = 3.3 V
40 °C < TJ < 125 °C
200
10 Hz to 100 kHz
IOUT = 10 mA
63
f = 120 Hz,
IOUT = 10 mA
VOUT = 3.3 V
88
f = 1 kHz
IOUT = 10 mA
VOUT = 3.3 V
65
f = 10 kHz,
IOUT= 10 mA
VOUT = 3.3 V
48
VOUT +1 V
VIN 18 V
IOUT = 0 mA,
-40 °C < TJ < 125 °C
60
μVRMS/V
dB
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
RL = 0
330
RL = 0, VIN = 16 V
200
Short-circuit current
DocID028460 Rev 2
mA
7/25
Electrical characteristics
Symbol
LDK320
Parameter
Enable input logic
low
VIN = 2.5 V to 18 V
-40 °C < TJ < 125 °C
Enable input logic
high
VIN = 2.5 V to 18 V
-40 °C < TJ < 125 °C
Enable pin input
current
VEN = VIN
VEN
IEN
TSHDN
COUT
Test conditions
Min.
Typ.
V
1.2
0.1
160
Hysteresis
20
Capacitance (see Section 6:
"Typical characteristics")
Unit
0.4
Thermal shutdown
Output capacitor
Max.
1
100
nA
°C
22
µF
Notes:
(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
VIN
VADJ
Parameter
Test conditions
Operating input
voltage
Typ.
2.5
Max.
Unit
18
V
Adjustable voltage
TJ = 25 °C
Adjustable voltage
accuracy
TJ = 25 °C
-2
+2
40 °C < TJ < 125 °C
-3
+3
Adjustable voltage,
LDK320A
1.185
V
%
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
IOUT = 100 mA
VOUT = 3.3 V
VDROP
8/25
Min.
Dropout voltage (1)
eN
Output noise voltage
IADJ
Adjust pin current
%
100
mV
IOUT = 200 mA
VOUT = 3.3 V
40 °C < TJ < 125 °C
200
10 Hz to 100 kHz
IOUT = 10 mA
60
350
μVRMS
1
DocID028460 Rev 2
μA
LDK320
Electrical characteristics
Symbol
SVR
IQ
ISC
Parameter
Supply voltage
rejection
Quiescent current
TSHDN
COUT
Min.
Typ.
83
f = 1 kHz IOUT = 10 mA
VOUT = VADJ
73
f = 10 kHz IOUT = 10 mA
VOUT = VADJ
58
VOUT +1 V ≤ VIN ≤ 18 V
IOUT = 0 mA
-40 °C < TJ < 125 °C
50
90
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
RL = 0
330
RL = 0, VIN = 16 V
200
Enable input logic low
VIN = 2.5 V to 18 V
-40 °C < TJ < 125 °C
Enable input logic
high
VIN = 2.5 V to 18 V
-40 °C < TJ < 125 °C
Enable pin input
current
VEN = VIN
Unit
dB
μA
mA
0.4
V
1.2
0.1
Thermal shutdown
160
Hysteresis
20
Output capacitor
Max.
f = 120 Hz
IOUT = 10 mA,
VOUT = VADJ
Short-circuit current
VEN
IEN
Test conditions
100
nA
°C
Capacitance (see Section 6:
"Typical characteristics")
DocID028460 Rev 2
1
22
μF
9/25
Typical characteristics
6
LDK320
Typical characteristics
Unless otherwise specified: T J = 25 °C, VIN = VOUT(NOM) + 1 V, CIN = COUT = 1 μF.
10/25
Figure 5: Output voltage vs temperature
(VIN = 2.5 V, VOUT = VADJ, IOUT = 1 mA)
Figure 6: Output voltage vs temperature
(VIN = 2.5 V, VOUT = VADJ, IOUT = 200 mA)
Figure 7: Output voltage vs temperature
(VIN = 4.3 V, VOUT = 3.3 V, IOUT = 1 mA)
Figure 8: Output voltage vs temperature
(VIN = 4.3 V, VOUT = 3.3 V, IOUT = 200 mA)
DocID028460 Rev 2
LDK320
Typical characteristics
Figure 9: Line regulation vs temperature
(VIN = 4.3 to 18 V, VOUT = 3.3 V, IOUT = 1 mA)
Figure 10: Line regulation vs temperature
(VIN = 2.5 to 18 V, VOUT = VADJ, IOUT = 1 mA)
Figure 11: Load regulation vs temperature
(VIN = 4.3 V, VOUT = 3.3 V, IOUT = 1 to 200 mA)
Figure 12: Load regulation vs temperature
(VIN = 2.5 V, VOUT = VADJ, IOUT = 1 to 200 mA)
Figure 13: Enable thresholds vs temperature
(IOUT = 1 mA)
Figure 14: Dropout voltage vs temperature
DocID028460 Rev 2
11/25
Typical characteristics
LDK320
Figure 15: Quiescent current vs input voltage
(IOUT = 1 mA)
Figure 16: Quiescent current vs temperature
(IOUT = 1 mA)
Figure 17: Quiescent current vs output current
(VIN = 4.3 V)
Figure 18: Quiescent current vs temperature
(IOUT = 200 mA)
Figure 19: Off-state current vs temperature
Figure 20: Short-circuit current vs temperature
(VIN = 4.3 V)
12/25
DocID028460 Rev 2
LDK320
Typical characteristics
Figure 21: Dropout voltage vs IOUT
Figure 22: Short-cicuit current vs drop voltage
Figure 23: SVR vs frequency
Figure 24: Output noise spectral density
Figure 25: Stability plan (VOUT = 3.3 V)
Figure 26: Stability plan (VOUT = VADJ)
DocID028460 Rev 2
13/25
Typical characteristics
LDK320
Figure 27: Startup with enable (VOUT = 3.3 V)
Figure 28: Startup with enable (VOUT = VADJ)
Figure 29: Turn-on time (VOUT = 3.3 V)
Figure 30: Turn-on time (VOUT = VADJ)
Figure 31: Line transient (VOUT = 3.3 V, rise)
Figure 32: Line transient (VOUT = 3.3 V, fall)
14/25
DocID028460 Rev 2
LDK320
Typical characteristics
Figure 33: Load transient (VOUT = 3.3 V, rise)
Figure 34: Load transient (VOUT = VADJ, fall)
DocID028460 Rev 2
15/25
Package information
7
LDK320
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
16/25
DocID028460 Rev 2
LDK320
Package information
Table 8: SOT23-5L package mechanical data
mm
Dim.
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°
Figure 36: SOT23-5L recommended footprint
Dimensions are in mm
DocID028460 Rev 2
17/25
Package information
7.2
LDK320
SOT23-5L packing information
Figure 37: SOT23-5L tape and reel outline
D
A
N
T
Po
Bo
Ko
Ao
P
Table 9: SOT23-5L tape and reel mechanical data
Dim.
mm
Min.
Typ.
A
180
C
12.8
D
20.2
N
60
13.0
T
18/25
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
DocID028460 Rev 2
LDK320
7.3
Package information
SOT-89 package information
Figure 38: SOT-89 package outline
DocID028460 Rev 2
19/25
Package information
LDK320
Table 10: SOT-89 mechanical data
mm
Dim.
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
20/25
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
120
R
0.25
β
90°
DocID028460 Rev 2
LDK320
Package information
Figure 39: SOT-89 recommended footprint
DocID028460 Rev 2
21/25
Package information
7.4
LDK320
SOT-89 packing information
Figure 40: SOT-89 carrier tape outline
Table 11: SOT-89 carrier tape mechanical data
mm
Dim.
22/25
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
DocID028460 Rev 2
LDK320
8
Ordering information
Ordering information
Table 12: Order code
SOT23-5L
SOT-89 (D configuration)
Accuracy (%)
LDK320AM-R
0.5
LDK320M-R
2
LDK320AM12R (1)
LDK320M12R
0.5
(1)
2
LDK320AM15R (1)
LDK320M15R
0.5
(1)
2
LDK320AM18R (1)
LDK320M18R
0.5
(1)
2
LDK320AM25R (1)
0.5
LDK320M25R (1)
2
LDK320AM30R
LDK320ADU30R (1)
LDK320M30R
2
LDK320AM33R (1)
LDK320M33R
LDK320ADU33R (1)
(1)
0.5
(1)
LDK320AM50R (1)
2
LDK320ADU50R (1)
LDK320M50R (1)
LDK320AM120R (1)
LDK320M120R
0.5
2
LDK320AM36R (1)
LDK320M36R
0.5
0.5
2
LDK320ADU120R (1)
(1)
0.5
2
Output voltage
ADJ
1.2
1.5
1.8
2.5
3
3.3
3.6
5
12
Notes:
(1)Available
on request.
DocID028460 Rev 2
23/25
Revision history
9
LDK320
Revision history
Table 13: Document revision history
Date
Revision
16-Nov-2015
1
First release.
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.
01-Jun-2016
24/25
Changes
DocID028460 Rev 2
LDK320
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