L4931ABXX datasheet(1/36 Pages) STMICROELECTRONICS

Part #	L4931ABXX

Description	Very low drop voltage regulators with inhibit

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Manufacturer	STMICROELECTRONICS [STMicroelectronics]

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August 2008

Rev 17

1/36

36

L4931ABxx

L4931Cxx

Very low drop voltage regulators with inhibit

Features

■ Very low dropout voltage (0.4 V)

■ Very low quiescent current

■ (Typ. 50 µA in off mode, 600 µA in on mode)

■ Output current up to 250 mA

■ Logic-controlled electronic shutdown

■ Output voltages of 2.7; 3.3; 3.5; 5; 8; 12 V

■ Automotive Grade product: 2.7 V, 3.3 V, 3.5 V

VOUT only in SO-8 package

■ Internal current and thermal limit

■ Only 2.2 µF for stability

■ Available in ± 1 % (AB) or 2 % (C) selection at

25 °C

■ Supply voltage rejection: 70 dB typ. for 5 V

version

■ Temperature range: -40 to 125 °C

Description

The L4931ABxx L4931Cxx are very Low Drop

regulators available in TO-220, SO-8, DPAK,

PPAK and TO-92 packages and in a wide range of

output voltages.

The very low drop voltage (0.4 V) and the very low

quiescent current make them particularly suitable

for low noise, low power applications and

specially in battery powered systems.

A TTL compatible shutdown logic control function

is available in PPAK and SO-8 packages.

This means that when the device is used as a

local regulator, it is possible to put a part of the

board in standby, decreasing the total power

consumption. It requires only a 2.2 µF capacitor

for stability allowing space and cost saving.

The L4931 is available as Automotive Grade in

SO-8 package only, for the options of output

voltages whose commercial Part Numbers are

shown in the Table 19 on page 34 (order codes).

These devices are qualified according to the

specification AEC-Q100 of the Automotive

market, in the temperature range -40 °C to

125 °C, and the statistical tests PAT, SYL, SBL are

performed.

TO-92

DPAK

TO-220

PPAK

SO-8

Table 1.

Device summary

Part numbers

L4931ABXX27

L4931CXX33

L4931ABXX50

L4931CXX80

L4931CXX27

L4931ABXX35

L4931CXX50

L4931ABXX120

L4931ABXX33

L4931CXX35

L4931ABXX80

L4931CXX120

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