LD39030
300 mA very low quiescent current linear regulator IC
Datasheet - production data
Applications
Mobile phones
Tablets
Digital still cameras (DSC)
Cordless phones and similar battery-
powered systems
Portable media players
Description
Features
Input voltage from 1.5 to 5.5 V
Ultra low dropout voltage (300 mV typ. at
300 mA load)
Very low quiescent current (20 µA typ. at no
load, 0.03 µA typ. in off mode)
Output voltage tolerance: ± 0.5 % (A
version) or ± 2.0 % @ 25 °C (standard
version)
300 mA guaranteed output current
High PSRR (80 dB@1 kHz, 50 db@100
kHz)
Wide range of output voltages available on
request: from 0.8 V up to 5.0 V in 50 mV
step
Logic-controlled electronic shutdown
Internal soft-start
Optional output voltage discharge feature
Compatible with ceramic capacitor
C
OUT
= 0.47 µF
Internal constant current and thermal
protections
Available in DFN4 1x1
Operating temperature range: -40 °C to
125 °C
The LD39030 high accuracy voltage regulator
provides 300 mA of maximum current from an
input voltage ranging from 1.5 V to 5.5 V, with a
typical dropout voltage of 300 mV.
It is available in DFN4 1x1 package, allowing the
maximum space saving.
The device is stabilized with a ceramic capacitor
on the output. The ultra low drop voltage, low
quiescent current and low noise features,
together with the internal soft-start circuit, make
the LD39030 suitable for low power battery-
operated applications.
An enable logic control function puts the
LD39030 in shutdown mode allowing a total
current consumption lower than 0.1 µA. Constant
current and thermal protection are provided.
August 2016
DocID028649 Rev 3
1/21
www.st.com
This is information on a product in full production.
Contents
LD39030
Contents
1
2
3
4
5
6
Diagram ............................................................................................ 3
Pin configuration ............................................................................. 4
Typical application .......................................................................... 5
Maximum ratings ............................................................................. 6
Electrical characteristics ................................................................ 7
Application information .................................................................. 9
6.1
6.2
6.3
Soft start function .............................................................................. 9
Output discharge function ................................................................. 9
Input and output capacitors ............................................................... 9
7
8
9
10
Typical characteristics .................................................................. 10
Package information ..................................................................... 15
8.1
DFN4 1x1 package information ....................................................... 16
Ordering information..................................................................... 19
Revision history ............................................................................ 20
2/21
DocID028649 Rev 3
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