Datasheet > RT6257A

RT6257A

更新时间： 2024-01-29 20:05:45

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
16页	333K
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中文翻译

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技术参数
数据手册

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RT6257A 技术参数

Status：	Active	Vin (min) (V)：	4.5
Vin (max) (V)：	18	Number of Outputs：	1
Vout (min) (V)：	0.6	Vout (max) (V)：	5
Preset Vout (V)：		Output Adj. Method：	Resistor
Iout (max) (A)：	6	Current Limit (typ) (A)：	8.5
Freq (typ) (kHz)：	500	Freq (min) (kHz)：
Freq (max) (kHz)：		Ext Sync：	No
Ron_HS (typ) (mOhm)：	30	Ron_LS (typ) (mOhm)：	20
Iq (typ) (mA)：	0.115	Features：	ACOT Control;Enable Input;Fast Transient Response;PSM;SCP;Stable with Ceramic Capacitor;UVP
Package Type：	TSOT-26(FC)

RT6257A 数据手册

Sample &

Buy

Reference

Design

RT6257A/B

18V, 6A, 500kHz, ACOT^TMStep-Down Converter in 6 pin

TSOT-23

General Description

Features

 4.5V to 18V Input Voltage Range

The RT6257A/B is a high-performance, synchronous step-

down DC-DC converter that can deliver up to 6A output

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

integrates low R_DS(ON)power MOSFETs, accurate 0.6V

reference and an integrated diode of bootstrap circuit to

offer a very compact solution.

 6A Output Current

 Constant-On-Time Mode to Enables Fast Transient

Response

 Low Output Ripple and Allows Ceramic Output

Capacitor

 500kHz Switching Frequency

 High Efficient Internal Power MOSFET Switch

Optimized for Lower Duty Cycle Applications

 Integrated 30mΩ/20mΩ MOSFETs

 Adjustable Output Voltage from 0.6V to 5V

 Internal Soft-Start (1.5ms typ.)

 Built-In UVP/OTP

The RT6257A/B adopts Advanced Constant On-Time

(ACOT^TM) control architecture that provides ultrafast

transient response and further reduces the external-

component count. In steady states, theACOT^TMoperates

in nearly constant switching frequency over line, load and

output voltage ranges and makes the EMI filter design

easier.

 Input Under Voltage Lockout

 TSOT23-6 (FC) Package

The device offers Independent enable control input pin for

easily sequence control. To control the inrush current

during the startup, the device provides a fixed 1.5ms soft-

start up. Fully protection features are also integrated in

the device including the cycle-by-cycle current limit

control, UVP, input UVLO and OTP.

Applications

 Set Top Box

 Portable TV

 Access Point Router

 DSL Modem

 LCD TV

The RT6257A/B is available in theTSOT-23-6 (FC) package.

Ordering Information

RT6257A/B

Package Type

J6F : TSOT-23-6 (FC)

Pin Configuration

(TOP VIEW)

Lead Plating System

BOOT

LX VIN

G : Green (Halogen Free and Pb Free)

UVP Option

H : Hiccup

FB EN GND

PSM/PWM

A : PSM/PWM

B : Force-PWM

TSOT-23-6 (FC)

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.

is a registered trademark of Richtek Technology Corporation.

DS6257A/B-03 October 2018

www.richtek.com

12 3 4 5 6 7...16

中文翻译

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与RT6257A相关器件

型号	品牌	获取价格	描述	数据表
RT6257AHGJ6F	RICHTEK	获取价格	ACOT Step-Down Converter
RT6257B	RICHTEK	获取价格	18V, 6A, 500kHz, ACOT® Step-Down Converter i
RT6257BHGJ6F	RICHTEK	获取价格	ACOT Step-Down Converter
RT6258B	RICHTEK	获取价格	暂无描述
RT6258BH	RICHTEK	获取价格	8A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6258C	RICHTEK	获取价格	暂无描述
RT6258CH	RICHTEK	获取价格	8A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
RT6258D	RICHTEK	获取价格	暂无描述
RT6259A	RICHTEK	获取价格	3A, 18V, 650kHz, ACOT? Synchronous Step-Down Converter
RT6259AHGQW	RICHTEK	获取价格	IC REG BUCK ADJ 3A SYNC 16WQFN

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