LD39100PUR Datasheet, PDF (1/23 Pages) STMicroelectronics – 1 A, low quiescent current, low noise voltage regulator

LD39100XX
LD39100XX12, LD39100XX25
1 A, low quiescent current, low noise voltage regulator
Features
■ Input voltage from 1.5 to 5.5 V
■ Ultra low dropout voltage (200 mV typ. at 1 A
load)
■ Very low quiescent current (20 µA typ. at no
load, 200 µA typ. at 1 A load, 1 µA max in off
mode)
■ Very low noise with no bypass capacitor
(30 µV_RMS at V_OUT = 0.8 V)
■ Output voltage tolerance: ± 2.0 % @ 25 °C
■ 1 A guaranteed output current
■ Wide range of output voltages available on
request: 0.8 V to 4.5 V with 100 mV step and
adjustable from 0.8 V
■ Logic-controlled electronic shutdown
■ Stabilized with ceramic capacitors C_OUT = 1 µF
■ Internal current and thermal limit
■ DFN6 (3 x 3 mm) package
■ Temperature range: - 40 °C to 125 °C
Applications
■ Printers
■ Personal digital assistants (PDAs)
■ Cordless phones
■ Consumer applications
DFN6 (3 x 3 mm)
with a typical dropout voltage of 200 mV. The
device is stable due to the use of ceramic
capacitors on the input and output. The ultra low
drop-voltage, low quiescent current and low noise
features make it suitable for low power battery
powered applications. Power supply rejection is
65 dB at low frequencies and starts to roll off at 10
kHz. An enable logic control function puts the
LD39100xx in shutdown mode, allowing a total
current consumption lower than 1 µA. The device
also includes short-circuit constant current limiting
and thermal protection.
Description
The LD39100xx provides 1 A maximum current
from an input voltage ranging from 1.5 V to 5.5 V
Table 1. Device summary
Part numbers
Order codes
LD39100XX
LD39100XX12
LD39100XX25
LD39100PUR
LD39100PU12R
LD39100PU25R
Output voltages
Adj. from 0.8 V
1.2 V
2.5 V
October 2011
Doc ID 15676 Rev 3
1/23
www.st.com
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