Datasheet > A7987

A7987

更新时间： 2024-09-16 14:57:19

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		开关稳压器
页数	文件大小	规格书
36页	2481K
描述
61 V 3A异步降压开关稳压器，电流限值可调，用于汽车应用

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A7987 数据手册

A7987

Datasheet

61 V, 3 A asynchronous step-down switching regulator with adjustable current

limitation for automotive

Features

•

3 A DC output current

4.5 V to 61 V operating input voltage

Adjustable f_sw(250 kHz to 1.5 MHz)

Output voltage adjustable from 0.8 V to V_IN

Synchronization

Adjustable soft-start time

Adjustable current limitation

VBIAS improves efficiency at light load

PGOOD open collector output

Digital frequency fold-back in short-circuit

Auto-recovery thermal shutdown

Qualified following AEC-Q100 requirements

Applications

•

Designed for 24 V automotive battery systems

Industrial and commercial vehicles

Description

The A7987 is a step-down monolithic switching regulator that can deliver up to 3 A

DC. The adjustable output voltage ranges from 0.8 V to V_IN. The wide input voltage

range and the almost 100% duty cycle capability meet the fail-safe specifications for

automotive systems. The embedded switch-over feature on the VBIAS pin maximizes

efficiency at light load. The adjustable current limitation, designed to select the

inductor RMS current in accordance with the nominal output current, and the high

switching frequency capability make the size of the application compact. Pulse-by-

pulse current sensing with digital frequency fold-back implements an effective

constant current protection over the different application conditions. The peak current

fold-back decreases the stress of the power components in heavy short-circuit

conditions. The PGOOD open collector output can also implement the output voltage

sequencing during the power-up phase. Multiple devices can be synchronized

sharing the SYNCH pin to prevent beating noise for low noise requirements such as

in infotainment applications.

Product status link

A7987

DS12928 - Rev 3 - September 2020

www.st.com

For further information contact your local STMicroelectronics sales office.

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