Datasheet > RT6251A

RT6251A

更新时间： 2024-02-12 13:14:18

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
19页	260K
描述
暂无描述

阅读下载

获取价格

技术参数
数据手册

如果您发现信息不准确，欢迎纠错

RT6251A 技术参数

Status：	Active	Vin (min)(V)：	4.5
Vin (max)(V)：	18	Number of Outputs：	1
Vout (min)(V)：		Vout (max)(V)：
Preset Vout(V)：		Output Adj. Method：	Resistor
Iout (max)(A)：	3	Current Limit (typ)(A)：	6.2
Freq (typ)(kHz)：		Freq (min)(kHz)：	200
Freq (max)(kHz)：	1200	Ext Sync：	Yes
Ron_HS (typ)(mOhm)：	46	Ron_LS (typ)(mOhm)：	36
Iq (typ)(mA)：		Features：	Adjustable Frequency;Adjustable Soft-Start;Current Mode Control;Enable Input;External Synchronization;OVP;PSM;Power Good;UVP
Package Type：	WQFN3.5x3.5-14A

RT6251A 数据手册

RT6251A/B

3A, 18V, Synchronous Step-Down Converter

General Description

Features

^Low R_DS(ON)Power MOSFET Switches 46mΩ/36mΩ

^Input Voltage Range : 4.5V to 18V

^Adjustable Switching Frequency : 200kHz to 1.2MHz

^Current-Mode Control

The RT6251A/B is a high efficiency, monolithic

synchronous step-downDC/DC converter that can deliver

up to 3A output current from a 4.5V to 18V input supply.

The RT6251A/B current-mode architecture with external

compensation allows the transient response to be

optimized over a wide range of loads and output capacitors.

Cycle-by-cycle current limit provides protection against

shorted outputs and soft-start eliminates input current

surge during start-up. Fault condition protections include

output under-voltage protection, output over-voltage

protection, and over-temperature protection. The low

current shutdown mode provides output disconnection,

enabling easy power management in battery-powered

systems.

^Synchronous to External Clock : 200kHz to 1.2MHz

^Accurate Voltage Reference 0.8V 1%

^Monotonic Start-Up into Pre-biased Outputs

^Adjustable Soft-Start

^Power Good Indicator

^Under-Voltage and Over-Voltage Protection

^Input Under-Voltage Lockout

Ordering Information

RT6251A/B

Package Type

QW : WQFN-14AL 3.5x3.5 (W-Type)

Applications

Lead Plating System

 High Performance Point of Load Regulation

G : Green (Halogen Free and Pb Free)

 Notebook Computers

H : Hiccup UVP

N : Non-UVP

 High Density and Distributed Power Systems

A : PSM

B : PWM

Note :

Richtek products are :

 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.

Simplified Application Circuit

RT6251A/B

BOOT

VIN

BOOT

PVIN

OUT

Enable

OUT

PGOOD

COMP1

OSC

COMP

RT/SYNC

SS/TR

COMP1

COMP2

GND

is a registered trademark of Richtek Technology Corporation.

DS6251A/B-00 November 2015

www.richtek.com

12 3 4 5 6 7...19

下载PDF

与RT6251A相关器件

型号	品牌	描述	获取价格	数据表
RT6251B	RICHTEK	暂无描述	获取价格
RT6252A	RICHTEK	暂无描述	获取价格
RT6252B	RICHTEK	暂无描述	获取价格
RT6253A	RICHTEK	暂无描述	获取价格
RT6253B	RICHTEK	暂无描述	获取价格
RT6254A	RICHTEK	ACOT Step-Down Converter	获取价格