LDK220
Datasheet
200 mA low quiescent current and low noise LDO
Features
•
•
•
•
•
•
•
•
•
•
•
•
•
Input voltage from 2.5 to 13.2 V
Very low-dropout voltage (100 mV typ. @ 100 mA load)
Low quiescent current (typ. 55 µA, 1 µA in off mode)
Low noise
Output voltage tolerance: ± 2.0% @ 25 °C
200 mA guaranteed output current
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
Output discharge function
Compatible with ceramic capacitor C
OUT
= 1 µF
Internal current and thermal limit
Available in SOT23-5L, SOT323-5L, SOT-89 and DFN6-1.2x1.3 packages
Temperature range: -40 °C to 125 °C
Applications
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•
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Battery-powered equipment
TV
Set-top box
PC and laptop
Industrial
Maturity status link
LDK220
Description
The
LDK220
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 13.2 V, with a typical
dropout voltage of 100 mV.
A ceramic capacitor stabilizes it on the output.
The very low drop voltage, low quiescent current and low noise make it suitable for
battery-powered applications.
The enable logic control function puts the
LDK220
in shutdown mode allowing a total
current consumption lower than 1 µA.
The device also includes a short-circuit constant current limiting and thermal
protection.
DS10219
-
Rev 6
-
February 2020
For further information contact your local STMicroelectronics sales office.
www.st.com
LDK220
Diagram
1
Diagram
Figure 1.
Block diagram (fixed version)
V
IN
V
OUT
Bias
generator
OPAMP
EN
Enable
Thermal
protection
Bandgap
reference
Current
limit
(*)
GND
Figure 2.
Block diagram (adjustable version)
V
IN
V
OUT
Bias
generator
OPAMP
EN
Enable
Thermal
protection
Bandgap
reference
Current
limit
ADJ
(*)
GND
(*) The device embeds autodischarge function (active when Enable in low). To avoid damages to the discharge
function, we discourage to apply any external voltage to V
OUT
pin when Enable pin is low.
DS10219
-
Rev 6
page 2/27
LDK220
Pin configuration
2
Pin configuration
Figure 3.
Pin connections (top view)
1
2
3
SOT23-5L
SOT323-5L
5
1
2
6
5
4
SOT-89
DFN6-1.2x1.3
GIPD220120161007MT
4
3
Table 1.
Pin description (SOT23-5L, SOT323-5L)
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.
EN cannot be left floating.
Adjustable pin on ADJ version, not connected on fixed version
Output voltage of the LDO
Function
Table 2.
Pin description (DFN6)
Pin n°
1
2
3
4
5
6
Symbol
OUT
N/C
ADJ/NC
EN
GND
IN
Output voltage of the LDO
Not connected
Adjustable pin on ADJ version, not connected in fixed version
Enable pin logic input: low = shutdown, high = active
EN cannot be left floating.
Common ground
Input voltage of the LDO
Function
Table 3.
Pin description (SOT-89)
Pin n°
(1)
1
2
3
Symbol
OUT
GND
IN
Output voltage of the LDO
Common ground
Input voltage of the LDO
Function
1. Adjustable version and enable pin are not available on the SOT-89 package.
DS10219
-
Rev 6
page 3/27
LDK220
Typical application
3
Typical application
Figure 4.
Typical application circuits
V
IN
ON
OFF
V
I
EN
V
O
V
OUT
V
IN
ON
OFF
V
I
EN
V
O
V
OUT
L DK 220
C
OUT
G ND
1µF
L DK 220
G ND
ADJ
C
IN
1µF
R
1
C
OUT
1µF
C
IN
1µF
R
2
V O =V AD J (1+R1/R2)
Fixed output voltage vers ion
Adjustable output voltage vers ion
GIPD220120161056MT
Note:
Adjustable version and enable pin are not available on the SOT-89 package.
DS10219
-
Rev 6
page 4/27
LDK220
Maximum ratings
4
Maximum ratings
Table 4.
Absolute maximum 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 14
- 0.3 to VI + 0.3
- 0.3 to VI + 0.3
- 0.3 to 2
Internally limited
500
- 65 to 150
- 40 to 125
Unit
V
V
V
V
mA
mW
°C
°C
1. Maximum power dissipation has to be calculated taking into account the package 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
SOT323-5L
246
134
SOT-89
110
15
DFN-6
237
104
Unit
°C/W
°C/W
DS10219
-
Rev 6
page 5/27
测试/测量
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