Datasheet > RT6257B

RT6257B

更新时间： 2024-11-13 16:37:07

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
16页	333K
描述
18V, 6A, 500kHz, ACOT® Step-Down Converter in 6 pin TSOT-23

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技术参数
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RT6257B 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;Force PWM;SCP;Stable with Ceramic Capacitor;UVP
Package Type：	TSOT-26(FC)

RT6257B 数据手册

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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RT6257B相关器件

型号	品牌	获取价格	描述	数据表
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
RT6259ALGQW	RICHTEK	获取价格	IC REG BUCK ADJ 3A SYNC 16WQFN
RT6259B	RICHTEK	获取价格	3A, 18V, 650kHz, ACOT? Synchronous Step-Down Converter

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