L4993 datasheet(1/30 Pages) STMICROELECTRONICS

部件名	L4993

功能描述	Low drop voltage regulator

PDF	30 Pages

Scroll/Zoom	100%

制造商	STMICROELECTRONICS [STMicroelectronics]

网页	http://www.st.com

标志

1 / 30 page

April 2008

Rev 6

1/30

30

L4993

Low drop voltage regulator

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 L4993 is a monolithic integrated 5V Voltage

regulator with a low drop voltage at currents up to

150mA.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 L4993 is protected against short circuit and

an over-temperature protection switches off the

device in case of extremely high power dissipa-

tion. The L4993 watchdog 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

∆V0

+/-2%

Max dropout voltage

Vdp

400 mV

Output current

I0

150 mA

Quiescent current

Iqn

79 µA(1)

1.

Typical value with watchdog disabled.

SO-8

SO-20

Table 1.

Device summary

Package

Order codes

Tube

Tape & reel

SO-8

L4993D

L4993DTR

SO-20 (16+2+2)

L4993MD

L4993MDTR

www.st.com

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