Datasheet > BuckConv> RT7256A

RT7256A

更新时间： 2024-02-26 20:36:57

品牌	Logo	应用领域
立锜 - RICHTEK		转换器
页数	文件大小	规格书
14页	224K
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RT7256A 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	17	Number of Outputs：	1
Vout (min) (V)：	0.8	Vout (max) (V)：	12
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	3	Current Limit (typ) (A)：	5.1
Freq (typ) (kHz)：	1200	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	110	Ron_LS (typ) (mOhm)：	90
Iq (typ) (mA)：	0.8	Features：	Adjustable Soft-Start;Current Mode Control;Enable Input;Internal Compensation;OCP;PSM;Stable with Ceramic Capacitor;UVP
Package Type：	PSOP-8	Datasheet：	https://datasheet5.oss-cn-shanghai.aliyuncs.com/datasheets/richtek/DS7256B-00.pdf

RT7256A 数据手册

RT7256B

3A, 17V, 1.2MHz Synchronous Step-Down Converter

General Description

Features

ꢀ

1.5% High Accuracy Reference Voltage

The RT7256B is a high efficiency, monolithic synchronous

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

output current from a 4.5V to 17V input supply. The

RT7256B's current mode architecture and internal

compensation allow the transient response to be

optimized over a wide input range and loads.

Cycle-by-cycle current limit provides protection against

shorted outputs, and soft-start eliminates input current

surge during start-up. The RT7256B 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 RT7256B is available in

an SOP-8 (Exposed Pad) package.

^ꢀ4.5V to 17V 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

RT7256B

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.

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

BOOT

VIN

GND

Marking Information

SOP-8 (Exposed Pad)

RT7256BxZSP : Product Number

RT7256Bx

ZSPYMDNN

x : H or L

YMDNN : Date Code

is a registered trademark of Richtek Technology Corporation.

DS7256B-00 February 2012

www.richtek.com

12 3 4 5 6 7...14

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与RT7256A相关器件

型号	品牌	描述	获取价格	数据表
RT7256B	RICHTEK	3A, 17V, 1.2MHz Synchronous Step-Down Converter	获取价格
RT7257A	RICHTEK	3A, 18V, 340kHz Synchronous Step-Down Converter	获取价格
RT7257B	RICHTEK	3A, 18V, 1.2MHz Synchronous Step-Down Converter	获取价格
RT7257BHZSP	RICHTEK	IC REG BUCK ADJ 3A SYNC 8SOP	获取价格
RT7257BLZSP	RICHTEK	IC REG BUCK ADJ 3A SYNC 8SOP	获取价格
RT7257C	RICHTEK	3A, 18V, 340kHz Synchronous Step-Down Converter	获取价格

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