Preliminary data

This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to

change without notice.

April 2010

Doc ID 15676 Rev 2

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LD39100XX

LD39100XX12, LD39100XX25

1 A, low quiescent current, low noise voltage regulator

Features

load)

load, 200 µA typ. at 1 A load, 1 µA max in off

mode)

request: 0.8 V to 4.5 V with 100 mV step and

adjustable from 0.8 V

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.

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.

DFN6 (3 x 3 mm)

Table 1.

Device summary

Part numbers

Order codes

Output voltages

LD39100XX

LD39100PUR

Adj. from 0.8 V

LD39100XX12

LD39100PU12R

1.2 V

LD39100XX25

LD39100PU25R

2.5 V

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