LD56050
Datasheet
500 mA ultra-low dropout linear regulator with bias supply
Features
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Input voltage from 0.8 to 5.5 V
Bias supply pin
Ultra low-dropout voltage (80 mV typ. at 500 mA load)
Low ground current (27 μA typ. at no-load)
Output voltage tolerance: ± 1.5% overtemperature, 0.5% at 25 °C
500 mA guaranteed output current
50 mV output voltage step available from 0.8 V to 3.6 V
Logic-controlled electronic shutdown
Internal current limit with foldback
Thermal shutdown
Output active discharge function
Available in DFN4 1.2 x 1.2 mm package
Temperature range: -40 °C to 85 °C
Applications
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Mobile phones
Tablets
Battery-powered systems
Camera supply
Maturity status link
LD56050
Description
The
LD56050
is a high accuracy voltage regulator, which provides 0.5 A of current. It
is equipped with an NMOS pass transistor, whose gate is biased by a dedicated pin,
thus allowing an ultra low-drop performance even at very low input voltages.
It is available in DFN4 1.2 x 1.2 package, allowing the maximum space saving.
The device is stabilized with a small ceramic capacitor on the output. The ultra low-
drop, low quiescent current and short circuit current foldback make the
LD56050
suitable for low power battery-operated applications.
An enable logic control function puts the
LD56050
in shutdown mode allowing a total
current consumption lower than 0.1 µA. Thermal protection is also included.
DS12441
-
Rev 2
-
April 2018
For further information contact your local STMicroelectronics sales office.
www.st.com
LD56050
Pin configuration
2
Pin configuration
Figure 3.
Pin connection (top view)
4
5
1
3
2
Table 1.
Pin description
Pin n° DFN8
1
2
3
Symbol
V
OUT
V
BIAS
EN
Function
Output voltage
Bias supply input
Enable pin logic input: low = shutdown, high = active.
Not internally pulled-up. Don't leave floating.
4
5
V
IN
GND
Input voltage (power element)
Common ground
DS12441
-
Rev 2
page 3/21
LD56050
Maximum ratings
4
Maximum ratings
Table 3.
Absolute maximum ratings
Symbol
V
IN
V
OUT
V
EN
I
OUT
P
D
T
STG
T
OP
Input voltage
Output voltage
Enable input voltage
Output current
Power dissipation
Storage temperature range
Operating junction temperature range
Parameter
Value
- 0.3 to 7
- 0.3 to V
IN
+ 0.3
- 0.3 to 7
Internally limited
Internally limited
- 40 to 150
- 40 to 85
Unit
V
V
V
mA
mW
°C
°C
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 4.
Thermal data
Symbol
R
thJA
Parameter
Thermal resistance junction-ambient
Value
170
Unit
°C/W
Table 5.
ESD performance
Symbol
ESD
Parameter
ESD protection voltage
Test conditions
HBM
CDM
Value
2
500
Unit
kV
V
DS12441
-
Rev 2
page 5/21
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