Datasheet > A5974D

A5974D

更新时间： 2023-12-20 18:45:51

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
46页	2419K
描述
最高2.5 A的降压开关稳压器，用于汽车应用

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A5974D 数据手册

A5974D

Up to 2.5 A step-down switching regulator for automotive

applications

Datasheet - production data

Application

HSOP8 - exposed pad

 Dedicated to automotive applications

Description

The A5974D is a step-down monolithic power

switching regulator with a minimum switch current

limit of 3.1 A, so it is able to deliver up to 2.5 A DC

current to the load depending on the application

conditions. The output voltage can be set from

1.235 V to 35 V. The high current level is also

achieved thanks to an HSOP8 package with an

Features

 Qualified following the AEC-Q100

requirements (see PPAP for more details)

 2.5 A DC output current

 Operating input voltage from 4 V to 36 V

 3.3 V / (± 2%) reference voltage

 Output voltage adjustable from 1.235 V to 35 V

 Low dropout operation: 100% duty cycle

 250 kHz internally fixed frequency

 Voltage feed-forward

exposed frame, that allows to reduce the R

th(JA)

down to approximately 40 °C/W. The device uses

an internal P-channel DMOS transistor (with

a typical R

of 250 m) as a switching

DS(on)

element to minimize the size of the external

components. An internal oscillator fixes the

switching frequency at 250 kHz. Having

a minimum input voltage of 4 V only it fits the

automotive applications requiring the device

operation even in cold crank conditions. A pulse-

by-pulse current limit with the internal frequency

modulation offers an effective constant current

short-circuit protection.

 Zero load current operation

 Internal current limiting

 Inhibit for zero current consumption

 Synchronization

 Protection against feedback disconnection

 Thermal shutdown

Figure 1. Application schematic

VIN =4V TO 36V

15uH

TP2

VOUT

VCC

VOUT

TP1

VREF

SYNC

COMP

A5974D

5.6K

GND

INH

EX-PAD

68nF

50V

10uF

10K

50V

3.3K

100p

330uF

33nF

small signal

power plane

TP3

TP4

GND

June 2014

DocID018774 Rev 2

1/46

This is information on a product in full production.

www.st.com

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