Datasheet > RT7257BLZSP

RT7257BLZSP

更新时间： 2022-09-29 19:33:14

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
14页	302K
描述
IC REG BUCK ADJ 3A SYNC 8SOP

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中文翻译

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数据手册

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RT7257BLZSP 数据手册

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RT7257B

3A, 18V, 1.2MHz Synchronous Step-Down Converter

General Description

Features



1.5% High Accuracy Reference Voltage

The RT7257B is a high efficiency, monolithic synchronous

step-down DC/DC converter that can deliver up to 3A

output current from a 4.5V to 18V input supply. The

RT7257B's current mode architecture and external

compensation allow the transient response to be

optimized over a wide input voltage range and loads.

Cycle-by-cycle current limit provides protection against

shorted outputs, and soft-start eliminates input current

surge during start-up. The RT7257B also provides under

voltage protection and thermal shutdown protection. The

low current (<3μA) shutdown mode provides output

disconnection, enabling easy power management in

battery-powered systems. The RT7257B is available in

an SOP-8 (Exposed Pad) package.

^4.5V to 18V Input Voltage Range

^3A Output Current

^Integrated N-MOSFET Switches

^Current Mode Control

^Fixed Frequency Operation : 1.2MHz

^Output Adjustable from 0.8V to 12V

^Up to 95% Efficiency

^Programmable Soft-Start

^Stable with Low ESR Ceramic Output Capacitors

^Cycle-by-Cycle Over Current Protection

^Input Under Voltage Lockout

 Output Under Voltage Protection

 Thermal Shutdown Protection

 RoHS Compliant and Halogen Free

Ordering Information

RT7257B

Applications

 Wireless AP/Router

Package Type

SP : SOP-8 (Exposed Pad-Option 1)

 Set-Top-Box

 Industrial and Commercial Low Power Systems

 LCDMonitors and TVs

Lead Plating System

Z : ECO (Ecological Element with

Halogen Free and Pb free)

 Green Electronics/Appliances

 Point of Load Regulation of High-PerformanceDSPs

H : UVP Hiccup

L : UVP Latch-Off

Note :

Pin Configurations

Richtek products are :

(TOP VIEW)

 RoHS compliant and compatible with the current require-

ments of IPC/JEDEC J-STD-020.

BOOT

VIN

 Suitable for use in SnPb or Pb-free soldering processes.

GND

COMP

GND

Marking Information

RT7257BxZSP : Product Number

SOP-8 (Exposed Pad)

RT7257Bx

ZSPYMDNN

x : H or L

YMDNN : Date Code

is a registered trademark of Richtek Technology Corporation.

DS7257B-04 October 2016

www.richtek.com

12 3 4 5 6 7...14

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与RT7257BLZSP相关器件

型号	品牌	获取价格	描述	数据表
RT7257C	RICHTEK	获取价格	3A, 18V, 340kHz Synchronous Step-Down Converter
RT7257D	RICHTEK	获取价格	3A, 18V, 1.2MHz Synchronous Step-Down Converter
RT7257DHZSP	RICHTEK	获取价格	IC REG BUCK ADJ 3A SYNC 8SOP
RT7257DLZSP	RICHTEK	获取价格	IC REG BUCK ADJ 3A SYNC 8SOP
RT7257E	RICHTEK	获取价格	3A, 17V, 340kHz Synchronous Step-Down Converter
RT7257EN	RICHTEK	获取价格	3A, 17V, 340kHz Synchronous Step-Down Converter
RT7257ENZ	RICHTEK	获取价格	3A, 17V, 340kHz Synchronous Step-Down Converter
RT7257G	RICHTEK	获取价格	3A, 18V, 800kHz Synchronous Step-Down Converter
RT7257J	RICHTEK	获取价格	3A, 18V, 340kHz Synchronous Step-Down Converter
RT7258	RICHTEK	获取价格	8A, 24V, 600kHz Step-Down Converter with Synchronous Gate Driver