Datasheet > A5972D_08

A5972D_08

更新时间： 2024-11-12 03:16:51

品牌	Logo	应用领域
意法半导体 - STMICROELECTRONICS		稳压器开关
页数	文件大小	规格书
11页	641K
描述
Up to 1.5 A step down switching regulator for automotive applications

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A5972D_08 数据手册

A5972D

Up to 1.5 A step down switching regulator

for automotive applications

Features

■ Qualified following the AEC-Q100

requirements (temperature grade 3), see PPAP

for more details.

■ Temperature range -40 °C to 85 °C

■ 1.5 A DC output current

SO-8

■ Operating input voltage from 4.4 V to 36 V

■ Output voltage adjustable from 1.235 V to 35 V

■ Low dropout operation: 100 % duty cycle

■ 250 kHz Internally fixed frequency

■ Voltage feedforward

Description

The A5972D is a step down monolithic power

switching regulator with a minimum switch current

limit of 1.8 A so it is able to deliver more than

1.5 A DC current to the load depending on the

application conditions.

■ Zero load current operation

The output voltage can be set from 1.235V to 35V.

The device uses an internal P-channel D-MOS

■ Internal current limiting

■ Protection against feedback disconnection

■ Thermal shutdown

transistor (with a typical R

of 250 mΩ) as

DS(on)

switching element to minimize the size of the

external components.

Applications

An internal oscillator fixes the switching frequency

at 250 kHz.

■ Automotive applications

Having a minimum input voltage of 4.4 V only, it is

particularly suitable for 5 V bus.

Pulse by pulse current limit with the internal

frequency modulation offers an effective constant

current short circuit protection.

Figure 1.

Application schematic

33uH

VIN=4.4V to 35V

VOUT=3.3V

OUT

VCC

COMP

100uF

A5972D

5.6K

22nF

STPS2L40U

10uF

GND

4.7KΩ

220pF

3.3K

May 2008

Rev 3

1/11

www.st.com

12 3 4 5 6 7...11

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