LD39150XX Datasheet, PDF (1/19 Pages) STMicroelectronics – Ultra low drop BiCMOS voltage regulator

LD39150xx
Ultra low drop BiCMOS voltage regulator
Features
■ 1.5 A guaranteed output current
■ Ultra low dropout voltage (200 mV typ. @ 1.5 A
load, 40 mV typ. @ 300 mA load)
■ Very low quiescent current (1 mA typ. @ 1.5 A
load, 1 µA max @ 25 °C in off mode)
■ Logic-controlled electronic shutdown
■ Current and thermal internal limit
■ ± 1.5 % output voltage tolerance @ 25 °C
■ Fixed and ADJ output voltages: 1.22 V, 1.8 V,
2.5 V, 3.3 V, ADJ. (see Table 1)
■ Temperature range: -40 to 125 °C
■ Fast dynamic response to line and load
changes
■ Stable with ceramic capacitor (see Section 7.1,
Section 7.2 and Section 7.3)
■ Available in PPAK, DPAK and DFN6 (3x3 mm)
Typical application
■ Microprocessor power supply
■ DSPs power supply
■ Post regulators for switching suppliers
■ High efficiency linear regulator
PPAK
DPAK
DFN6 (3x3 mm)
Description
The LD39150xx is a fast ultra low drop linear
regulator which operates from 2.5 V to 6 V input
supply.
A wide range of output options are available. The
low drop voltage, low noise, and ultra low
quiescent current make it suitable for low voltage
microprocessor and memory applications. The
device is developed on a BiCMOS process which
allows low quiescent current operation
independently of output load current.
Table 1. Device summary
Part numbers
DPAK (T&R)
LD39150XX12
LD39150XX18
LD39150DT12-R
LD39150DT18-R
LD39150XX25
LD39150XX33
LD39150XX
LD39150DT25-R
LD39150DT33-R
1. Available on request.
Order codes
PPAK (T&R)
LD39150PT18-R
LD39150PT25-R
LD39150PT33-R
LD39150PT-R
DFN ⁽¹⁾
LD39150PU12R
LD39150PU18R
LD39150PU25R
LD39150PU33R
LD39150PU-R
Output voltages
1.22 V
1.8 V
2.5 V
3.3 V
ADJ from 1.22 to 5.0 V
January 2009
Rev 2
1/19
www.st.com
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