L4988MD datasheet(1/32 Pages) STMICROELECTRONICS

Il numero della parte	L4988MD

Spiegazioni elettronici	Low drop voltage regulator

PDF	32 Pages

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Produttore elettronici	STMICROELECTRONICS [STMicroelectronics]

Homepage	http://www.st.com

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1 / 32 page

This is information on a product in full production.

September 2013

Doc ID 13617 Rev 6

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1

L4988

Low drop voltage regulator

Datasheet

 production data

Features

■ Operating DC supply voltage range 5.6V to

31V

■ Reset circuit sensing the output voltage down

to 1V

■ Programmable reset pulse delay with external

capacitor

■ Watchdog

■ Programmable watchdog timer with external

capacitor

■ Enable input for enabling/disabling the

watchdog functionality

■ Thermal shutdown and short circuit protection

■ Wide temperature range (Tj = -40°C to 150°C)

Description

The L4988 is a monolithic integrated 5V voltage

regulator with a low drop voltage at currents up to

200mA. The output voltage regulating element

consists in a p-channel MOS and the regulation is

performed regardless of input voltage transients

up to 40V. The high precision of the output voltage

is obtained with a pre-trimmed reference voltage.

The L4988 is protected against short circuit and

an over-temperature protection switches off the

device in case of extremely high power dissipa-

tion. The L4988 is active when the Enable is high.

State of the art features like reset and watchdog

make this device particularly suitable to supply

microprocessor systems in automotive

applications.

Max DC supply voltage

VS

40V

Max output voltage tolerance

V

0

+/-2%

Max dropout voltage

Vdp

500 mV

Output current

I0

200 mA

Quiescent current

Iqn

75 µA(1)

1.

Typical value with watchdog disabled.

SO-8

SO-20

Table 1.

Device summary

Package

Order codes

Tube

Tape & reel

SO8

L4988D

L4988DTR

SO20 (16+2+2)

L4988MD

L4988MDTR

www.st.com

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