Datasheet > A5970D_08

A5970D_08

更新时间： 2022-04-23 23:00:11

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
13页	716K
描述
Up to 1 A step down switching regulator for automotive applications

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A5970D_08 数据手册

A5970D

Up to 1 A step down switching regulator

for automotive applications

Features

■ Qualified following the AEC-Q100

requirements (temperature grade 3),

see PPAP for more details.

■ Up to 1 A DC output current

SO-8

■ Operating input voltage from 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 A5970D is a step down monolithic power

switching regulator capable to deliver up to 1 A at

output voltages from 1.2 V to 35 V.

■ Zero load current operation

The device uses an internal P-channel D-MOS

transistor (with a typical R

of 250 mΩ) as

■ Internal current limiting

DS(on)

switching element to minimize the size of the

external components.

■ Inhibit for zero current consumption

■ Synchronization

An internal oscillator fixes the switching frequency

at 250 kHz.

■ Protection against feedback disconnection

■ Thermal shutdown

Having a minimum input voltage of 4 V only, it is

particularly suitable for 5 V bus.

Applications

Pulse by pulse current limit with the internal

frequency modulation offers an effective constant

current short circuit protection.

■ Dedicated to automotive applications

Figure 1.

Application schematic

L1 33uH

Vout=3.3V

VIN=4.4V to 35V

OUT

VCC

SYNCH

COMP

A5970D

5k6

STPS340U

10uF

22nF

100uF

10V

35V

VREF

3.3V

CERAMIC

INH

GND

220pF

4k7

3k3

August 2008

Rev 4

1/12

www.st.com

12 3 4 5 6 7...13

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