Datasheet > L5973D_08

L5973D_08

更新时间： 2024-09-23 03:49:47

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
17页	300K
描述
2.5 A switch step down switching regulator?癎

阅读下载

中文翻译

获取价格

数据手册

如果您发现信息不准确，欢迎纠错

L5973D_08 数据手册

L5973D

2.5 A switch step down switching regulator

Features

■ 2.5 A internal switch

■ 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 feedforward

HSOP8 exposed pad

Description

The L5973D is a step down monolithic power

switching regulator with a minimum switch current

limit of 2.5 A so it is able to deliver more than 2 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 SO8 package with exposed frame,

that allows to reduce the Rth(j-amb) down to

approximately 40 °C/W.

■ Zero load current operation

■ Internal current limiting

■ Inhibit for zero current consumption

■ Synchronization

■ Protection against feedback disconnection

■ Thermal shutdown

The device uses an internal P-channel D-MOS

transistor (with a typical Rdson of 250 mΩ) as

switching element to minimize the size of the

external components.

Applications

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

LCD monitors

An internal oscillator fixes the switching frequency

at 250 kHz.

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

particularly suitable for 5 V bus, available in all

computer related applications.

Pulse by pulse current limit with the internal

frequency modulation offers an effective constant

current short circuit protection.

■ Networking: XDSL, modems, DC-DC modules

■ Computer: printers, audio/graphic cards,

optical storage, hard disk drive

■ Industrial: changers, car battery, DC-DC

converters

Figure 1.

Test application circuit

VREF

3.3V

L1 15µH

VOUT=3.3V

OUT

VIN = 4.4V to 35V

VCC

STPS340U

5.6K

L5973D

SYNC.

COMP

330µF

10V

10µF

35V

22nF

INH

GND

CERAMIC

3.3K

220pF

4.7K

D03IN1439

January 2008

Rev 16

1/17

www.st.com

12 3 4 5 6 7...17

中文翻译

下载PDF

与L5973D_08相关器件

型号	品牌	获取价格	描述	数据表
L5973D013TR	STMICROELECTRONICS	获取价格	2.5 A switch step down switching regulator?癎
L5973DD	STMICROELECTRONICS	获取价格	3.5A SWITCHING REGULATOR, 280kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, HSOP-8
L5973DD013TR	STMICROELECTRONICS	获取价格	3.5A SWITCHING REGULATOR, 280kHz SWITCHING FREQ-MAX, PDSO8, LEAD FREE, HSOP-8
L5980	STMICROELECTRONICS	获取价格	0.7A step-down switching regulator
L5980_08	STMICROELECTRONICS	获取价格	0.7 A step-down switching regulator
L5980TR	STMICROELECTRONICS	获取价格	0.7A step-down switching regulator
L5981	STMICROELECTRONICS	获取价格	1A step-down switching regulator
L5981_08	STMICROELECTRONICS	获取价格	1 A step-down switching regulator
L5981TR	STMICROELECTRONICS	获取价格	1A step-down switching regulator
L5983	STMICROELECTRONICS	获取价格	1.5A step-down switching regulator