Regulator. LD39100PUR Datasheet

LD39100PUR Datasheet PDF

Part LD39100PUR
Description Low Noise Voltage Regulator
Feature www.DataSheet4U.com LD39100XX LD39100XX12, LD39100XX25 1 A, low quiescent current, low noise voltag.
Manufacture ST Microelectronics
Datasheet
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www.DataSheet4U.com LD39100XX LD39100XX12, LD39100XX25 1 A, LD39100PUR Datasheet





LD39100PUR
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LD39100XX
LD39100XX12, LD39100XX25
1 A, low quiescent current, low noise voltage regulator
Preliminary data
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 µVRMS at VOUT = 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 COUT = 1 µF
Internal current and thermal limit
DFN6 (3 x 3 mm) package
Temperature range: -40 °C to 125 °C
DFN6 (3 x 3 mm)
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. Typical applications are
printers, personal digital assistants (PDAs),
cordless phones and consumer applications.
Description
The LD39100xx provides 1 A maximum current
from an input voltage ranging from 1.5 V to 5.5 V
with a typical dropout voltage of 200 mV. The
deveice 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.
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
July 2009
Doc ID 15676 Rev 1
This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to
change without notice.
1/24
www.st.com
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LD39100PUR
Contents
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Contents
LD39100XX, LD39100XX12, LD39100XX25
1 Circuit schematics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 3
2 Pin configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 4
3 Maximum ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 5
4 Electrical characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6
5 Typical performance characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
6 Application information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
6.1 Power dissipation . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
6.2 Enable function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
6.3 Power Good function . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
7 Package mechanical data . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
8 Different output voltage versions of the LD39100xx
available on request . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22
9 Revision history . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23
2/24 Doc ID 15676 Rev 1




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