L5987A 查看數據表（PDF） - STMicroelectronics

零件编号

产品描述 (功能)

生产厂家

L5987A

3 A step-down switching regulator

STMicroelectronics 

L5987

3 A step-down switching regulator

Datasheet - production data

VFQFPN8 3 x 3 mm

HSOP8 exposed pad

 Industrial: PLD, PLA, FPGA, chargers

 Networking: XDSL, modems, DC-DC modules

 Computer: optical storage, hard disk drive,

printers, audio/graphic cards

 LED driving

Features

Description

 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 feedforward

 Zero load current operation

 Overcurrent and thermal protection

 VFQFPN 3 x 3 -8L and HSOP8 package

The L5987 is a step-down switching regulator

with a 3.5 A (minimum) current limited embedded

Power MOSFET, so it is able to deliver an up to

3 A current to the load depending on the

application conditions.

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 a 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.

Applications

 Consumer: STB, DVD, DVD recorder, car

The VFQFPN8 and the HSOP packages with an

exposed pad allow reducing the RthJA down to

60 °C/W and 40 °C/W respectively.

audio, LCD TV and monitors

Figure 1. Application circuit

May 2014

This is information on a product in full production.

DocID14972 Rev 4

1/40

www.st.com

Share Link: