LD2982BXX27 datasheet(1/20 Pages) STMICROELECTRONICS

部品番号	LD2982BXX27

部品情報	Very low drop and low noise voltage regulator with inhibit function, low ESR capacitors compatible

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メーカー	STMICROELECTRONICS [STMicroelectronics]

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July 2008

Rev 6

1/20

20

LD2982Axx

LD2982Bxx

Very low drop and low noise voltage regulator with

inhibit function, low ESR capacitors compatible

Features

■ Very low dropout voltage (120 mV at 50 mA

and 7 mV at 1 mA load)

■ Very low quiescent current (375 mA typ. at

50 mA load and 75 mA at 1 mA)

■ Output current up to 50 mA

■ Logic controlled electronic shutdown

■ Output voltage of 1.8, 2.7, 3.2, 3.3 V

■ Internal current and thermal limit

■ Available in ± 1 % tolerance

(at 25 °C, A version)

■ Supply voltage rejection: 45 dB (typ)

■ Only 1 µF for stability

■ Low output noise voltage 30 µVrms

■ Smallest package SOT23-5L

■ Temperature range: -40 °C to 125 °C

Description

The LD2982A/Bxx is a 50 mA fixed output voltage

regulator. The ultra low drop voltage and the low

quiescent current make them particularly suitable

for low noise, low power applications, and in

battery powered systems. In sleep mode

quiescent current is less than 1 µA when INHIBIT

pin is pulled low. Shutdown logic control function

is available on pin 3 (TTL compatible). This

means that when the device is used as local

regulator, it is possible to put a part of the board in

standby, decreasing the total power consumption.

An external capacitor CBYP = 10 nF connected

between bypass pin and GND reduce the noise

to 30 µVrms.

Typical application are in cellular phone,

palmtop/laptop computer, personal digital

assistant (PDA), personal stereo, camcorder and

camera.

SOT23-5L

Table 1.

Device summary

Part numbers

A Version

B Version

Output voltage

LD2982AXX18

LD2982BXX18

1.8 V

LD2982AXX27

LD2982BXX27

2.7 V

LD2982AXX32

LD2982BXX32

3.2 V

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同様の部品番号 - LD2982BXX27

メーカー	部品番号	データシート	部品情報
STMicroelectronics	LD2982BXX18	333Kb / 17P	Very low drop and low noise voltage regulator with inhibit function, low ESR capacitors compatible

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