L4979D 查看數據表（PDF） - STMicroelectronics

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L4979D

Low drop voltage regulator

STMicroelectronics 

L4979D

L4979MD

Low drop voltage regulator

Features

■ Operating DC supply voltage range 5.6 V to

31 V

■ Low quiescent current (6 µA typ. @ 25 °C with

enable low)

■ High precision output voltage (2%)

■ Low dropout voltage less than 0.5 V

■ Reset circuit sensing the output voltage down

to 1 V

■ Programmable reset pulse delay with external

capacitor

■ Watchdog

■ Programmable watchdog timer with external

capacitor

■ Thermal shutdown and short circuit protection

■ Automotive temperature range (Tj = -40 °C to

150 °C)

■ Enable input for enabling/disabling the voltage

regulator output

Datasheet  production data

'!0'#&4

SO-8

'!0'#&4

SO-20

Description

L4979D and L4979MD are low dropout linear

regulators with microprocessor control functions

such as low voltage reset, watchdog, on/off

control. Typical quiescent current is 100 µA in

very low output current mode and enabled

regulator. The devices drop to 6 µA with not

enabled regulators.

On chip trimming results in high output voltage

accuracy (2%). Accuracy is kept over wide

temperature range, line and load variation.

The maximum input voltage is 40 V. The max

output current is internally limited. Internal

temperature protection disables the voltage

regulator output.

Table 1. Device summary

Package

Order codes

Tube

Tape and reel

SO-8

L4979D

L4979D013TR

SO-20

L4979MD L4979MD013TR

September 2013

This is information on a product in full production.

Doc ID 10262 Rev 9

1/22

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