Datasheet > TPS54540

TPS54540

更新时间： 2024-11-08 12:02:43

品牌	Logo	应用领域
德州仪器 - TI		转换器
页数	文件大小	规格书
38页	2021K
描述
4.5 V to 42 V Input, 5 A, Step Down DC-DC Converter with Eco-modeâ¢

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TPS54540 数据手册

TPS54540

www.ti.com

SLVSBX7 –MAY 2013

4.5 V to 42 V Input, 5 A, Step Down DC-DC Converter with Eco-mode™

Check for Samples: TPS54540

FEATURES

•

High Efficiency at Light Loads with Pulse

Skipping Eco-mode™

•

8-Pin HSOIC with PowerPAD™ Package

–40°C to 150°C T_JOperating Range

•

92-mΩ High-Side MOSFET

Supported by WEBENCH™ Software Tool

146 μA Operating Quiescent Current and

2 μA Shutdown Current

APPLICATIONS

•

100 kHz to 2.5 MHz Fixed Switching Frequency

Synchronizes to External Clock

•

Industrial Automation and Motor Control

Vehicle Accessories: GPS, Entertainment

Low Dropout at Light Loads with Integrated

BOOT Recharge FET

USB Dedicated Charging Ports and Battery

Chargers

•

Adjustable UVLO Voltage and Hysteresis

0.8 V 1% Internal Voltage Reference

•

12 V and 24 V Industrial, Automotive and

Communications Power Systems

DESCRIPTION

The TPS54540 is a 42 V, 5 A, step down regulator with an integrated high side MOSFET. The device survives

load dump pulses up to 45V per ISO 7637. Current mode control provides simple external compensation and

flexible component selection. A low ripple pulse skip mode reduces the no load supply current to 146 μA.

Shutdown supply current is reduced to 2 μA when the enable pin is pulled low.

Undervoltage lockout is internally set at 4.3 V but can be increased using the enable pin. The output voltage start

up ramp is internally controlled to provide a controlled start up and eliminate overshoot.

A wide switching frequency range allows either efficiency or external component size to be optimized. Output

current is limited cycle-by-cycle. Frequency foldback and thermal shutdown protects internal and external

components during an overload condition.

The TPS54540 is available in an 8-pin thermally enhanced HSOIC PowerPAD™ package.

SIMPLIFIED SCHEMATIC

EFFICIENCY vs LOAD CURRENT

100

V_IN

36 V to 12 V

VIN

BOOT

TPS54540

V_OUT

12 V to 3.3 V

12 V to 5 V

COMP

V_OUT= 12 V, fsw = 800kHz,

V_OUT= 5 V and 3.3 V, f sw = 400 kHz

RT/CLK

0.5

1.5

2.5

3.5

4.5

GND

C024

I_O- Output Current (A)

Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of

Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.

Eco-mode, PowerPAD, WEBENCH are trademarks of Texas Instruments.

PRODUCTION DATA information is current as of publication date.

Products conform to specifications per the terms of the Texas

Instruments standard warranty. Production processing does not

necessarily include testing of all parameters.

12 3 4 5 6 7...38

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与TPS54540相关器件

型号	品牌	获取价格	描述	数据表
TPS54540B	TI	获取价格	具有 Eco-Mode™ 的 4.5V 至 42V 输入、5A 降压转换器
TPS54540BDDA	TI	获取价格	具有 Eco-Mode™ 的 4.5V 至 42V 输入、5A 降压转换器 \| DDA \|
TPS54540BDDAR	TI	获取价格	具有 Eco-Mode™ 的 4.5V 至 42V 输入、5A 降压转换器 \| DDA \|
TPS54540B-Q1	TI	获取价格	具有 Eco-Mode™ 的 4.5V 至 42V 输入、5A、降压直流/直流转换器
TPS54540BQDDAQ1	TI	获取价格	具有 Eco-Mode™ 的 4.5V 至 42V 输入、5A、降压直流/直流转换器 \|
TPS54540BQDDARQ1	TI	获取价格	具有 Eco-Mode™ 的 4.5V 至 42V 输入、5A、降压直流/直流转换器 \|
TPS54540DDA	TI	获取价格	具有 Eco-Mode 的 42V、5A 降压直流/直流转换器 \| DDA \| 8 \| 0
TPS54540DDAR	TI	获取价格	具有 Eco-Mode 的 42V、5A 降压直流/直流转换器 \| DDA \| 8 \| -
TPS54541	TI	获取价格	具有软启动和 Eco-mode™ 的 4.5V 至 42V 输入 5A 降压直流/直流转换
TPS54541DPRR	TI	获取价格	具有软启动和 Eco-mode™ 的 4.5V 至 42V 输入 5A 降压直流/直流转换

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