L5987 datasheet(1/42 Pages) STMICROELECTRONICS

부품명	L5987

상세설명	3 A step-down switching regulator

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제조업체	STMICROELECTRONICS [STMicroelectronics]

홈페이지	http://www.st.com

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Preliminary Data

This is preliminary information on a new product now in development or undergoing evaluation.

Details are subject to change without notice.

August 2008

Rev 1

1/42

42

L5987

3 A step-down switching regulator

Features

■ 3 A DC output current

■ 2.9 V to 18 V input voltage

■ Output voltage adjustable from 0.6 V

■ 250 kHz switching frequency, programmable

up to 1 MHz

■ Internal soft-start and inhibit

■ Low dropout operation: 100 % duty cycle

■ Voltage feed-forward

■ Zero load current operation

■ Over current and thermal protection

■ VFQFPN3x3-8L and HSOP8 package

Applications

■ Consumer:

STB, DVD, DVD recorder, car audio, LCD TV

and monitors

■ Industrial:

PLD, PLA, FPGA, chargers

■ Networking: XDSL, modems, DC-DC modules

■ Computer:

Optical storage, hard disk drive, printers,

audio/graphic cards

■ LED driving

Description

The L5987 is a step down switching regulator with

3.5 A (minimum) current limited embedded power

MOSFET, so it is able to deliver up to 3 A current

to the load depending on the application

conditionals Section 5.7 and Section 5.8).

The input voltage can range from 2.9 V to 18 V,

while the output voltage can be set starting from

0.6 V to VIN. Having a minimum input voltage of

2.9 V, the device is suitable also for 3.3 V bus.

Requiring a minimum set of external components,

the device includes an internal 250 kHz switching

frequency oscillator that can be externally

adjusted up to 1 MHz.

The QFN and the HSOP package with exposed

pad allow reducing the RthJA down to 60 °C/W

and 40 °C/W respectively.

HSOP8 exposed pad

VFQFPN8 3x3 mm

www.st.com

Figure 1.

Application circuit

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유사한 설명 - L5987

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	L7986TR	1Mb / 43P	3 A step-down switching regulator 05-Sep-2014
	ST1S31	1Mb / 35P	3 A DC step-down switching regulator 03-Mar-2016
	PM8903A	2Mb / 33P	3 A step-down monolithic switching regulator 11-Jan-2013
	ST1S40	849Kb / 30P	3 A DC step-down switching regulator 28-Aug-2019

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유사한 부품 번호 - L5987

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