LDK320
200 mA high accuracy and high PSRR voltage regulator
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 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 C
OUT
= 1 μF
Current, SOA and thermal protections
Available in SOT23-5L and SOT-89 packages
Temperature range: -40 °C to 125 °C
SOT23-5L
SOT-89
Applications
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DSC
TV
BD, DVD
PC
Industrial
Maturity status link
LDK320
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 4
-
October 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
LDK320
Pin configuration
2
Pin configuration
Figure 3.
Pin connection (top view)
1
2
3
SOT23-5L
5
4
SOT-89
SOT-89 (D configuration)
GIPD030820151343MT
Table 1.
Pin description (SOT23-5L)
Pin n°
1
2
3
4
5
Symbol
IN
GND
EN
ADJ/NC
OUT
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
Function
Table 2.
Pin description (SOT-89)
Pin n°
1
2
3
TAB
Symbol
OUT
GND
IN
GND
Output voltage of the LDO
Common ground
Input voltage of the LDO
Common ground
Function
Table 3.
Pin description (SOT-89, D configuration)
Pin n°
1
2
3
TAB
Symbol
GND
IN
OUT
IN
Common ground
Input voltage of the LDO
Output voltage of the LDO
Input voltage of the LDO
Function
DS11321
-
Rev 4
page 3/28
LDK320
Maximum ratings
4
Maximum ratings
Table 4.
Absolute maximun ratings
Symbol
V
IN
V
OUT
V
EN
V
ADJ
I
OUT
P
D
(1)
T
STG
T
OP
Parameter
DC input voltage
DC output voltage
Enable input voltage
ADJ pin voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature
range
Value
- 0.3 to 20
- 0.3 to V
I
+ 0.3
- 0.3 to V
I
+ 0.3
- 0.3 to 2
Internally limited
Internally limited
- 65 to 150
- 40 to 125
Unit
V
V
V
V
mA
mW
°C
°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
R
thJA
R
thJC
Parameter
Thermal resistance junction-ambient
Thermal resistance junction-case
SOT23-5L
160
68
SOT-89
110
15
Unit
°C/W
°C/W
DS11321
-
Rev 4
page 5/28
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