Datasheet > L5972D_0710

L5972D_0710

更新时间： 2024-02-14 08:05:45

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
15页	238K
描述
2A switch step down switching regulator

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中文翻译

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L5972D_0710 数据手册

L5972D

2A switch step down switching regulator

Features

■ 2A internal switch

■ Operating input voltage from 4.4V to 36V

■ Output voltage adjustable from 1.235V to 35V

■ Low dropout operation: 100% duty cycle

■ 250kHz Internally fixed frequency

■ Voltage feedforward

SO8

Description

■ Zero load current operation

The L5972D is a step down monolithic power

switching regulator with a minimum switch current

limit of 2A so it is able to deliver more than 1.5A

DC current to the load depending on the

application conditions.

■ Internal current limiting

■ Protection against feedback disconnection

■ Thermal shutdown

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

Applications

The device uses an internal P-Channel D-MOS

transistor (with a typical Rdson of 250mΩ) as

switching element to minimize the size of the

external components.

■ Consumer: STB, DVD, TV, VCR, car radio,

LCD monitors

■ Networking: XDSL, modems, DC-DC modules

■ Computer: printers, audio/graphic cards,

An internal oscillator fixes the switching frequency

at 250kHz.

optical storage, hard disk drive

■ Industrial: changers, car battery, DC-DC

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

particularly suitable for 5V bus, available in all

computer related applications.

converters

Pulse by pulse current limit with the internal

frequency modulation offers an effective constant

current short circuit protection.

Figure 1.

Test application circuit

L1 33µH

VOUT=3.3V

VIN = 4.4V to 35V

VCC

OUT

5.6K

L5972D

STPS2L40U

COMP

100µF

10V

10µF

35V

22nF

GND

CERAMIC

3.3K

220pF

4.7K

D03IN1436

October 2007

Rev 10

1/15

www.st.com

12 3 4 5 6 7...15

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