LD3980 Datasheet, PDF (1/16 Pages) STMicroelectronics – Low drop - Low supply voltage Low ESR capacitor compatible

LD3980
Low drop - Low supply voltage
Low ESR capacitor compatible
Feature summary
■ Input voltage from 1.7 to 3.6V
■ Ultra low dropout voltage (130mV typ. at
300mA load)
■ Very low quiescent current (110µA typ. at no
load, 130µA max. at 300mA load; max 0.5µA in
OFF MODE)
■ Output voltage tolerance: +/- 1.0% @ 25°C, +/-
2.0% full temperature range
■ Guaranteed output current up to 300mA
■ Wide range of output voltage: 0.8V to 3.0V
■ Logic-controlled electronic shutdown
■ Compatible with ceramic capacitor C_O = 1µF
■ Internal current and thermal limit
■ Temperature range: -40°C to 85°C
Description
The LD3980 provides up to 300mA, from 1.7V to
3.6V input voltage. It can deliver a guaranteed
300mA continuous load current with a low 100mV
dropout. It is stable with ceramic capacitor. The
Block diagram
DFN6 (3x3)
ultra low drop-voltage, low quiescent current and
low noise makes it suitable for low power
applications and in battery powered systems.
High power supply rejection is maintained down
to low input voltage levels common to battery
operated circuits. Shutdown Logic Control
function is available this means that when the
device is used as local regulator, it is possible to
put a part of the board in standby, decreasing the
total power consumption. The device also
includes a constant current limiting and thermal
overload protection. Typical applications are in
mobile phone, personal digital assistant (PDAs),
cordless phone and similar battery powered
wireless systems, portable information
appliances..
December 2006
Rev. 1
1/16
www.st.com
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