Datasheet > RT6255AHSGJ6F

RT6255AHSGJ6F

更新时间： 2024-01-20 18:14:29

品牌	Logo	应用领域
立锜 - RICHTEK		/
页数	文件大小	规格书
20页	295K
描述
ACOT Step-Down Converter

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RT6255AHSGJ6F 数据手册

RT6255A/B

5A, 18V, 500kHz, ACOT^TMStep-Down Converter

General Description

Features

^Input Supply Voltage Range : 4.5V to 18V

The RT6255A/B is a high-efficiency, synchronous step-

down DC-DC converter that can deliver up to 5A output

current from a 4.5V to 18V input supply. The RT6255A/B

adopts Advanced Constant On-Time (ACOT^TM) control

architecture to provide an ultrafast transient response with

few external components and to operate in nearly constant

switching frequency over line, load, and output voltage

ranges.

^Output Current : 5A

^Advanced Constant On-Time (ACOT^TM) Control for

Ultrafast Transient Response

^Steady Switching Frequency : 500kHz

^Forced PWM Mode (RT6255B)

^Pulse-Skipping Mode (PSM) at Light Load

(RT6255A)

^Optimized for Low-ESR Ceramic Output Capacitors

^Programmable Output Voltage : 0.6V to 5V

^Internal 45mΩ Switch and 23mΩ Synchronous

Rectifier

The RT6255A/B features cycle-by-cycle current limit

protection against short-circuit outputs, and soft-start

function to prevent inrush current during start-up. It also

includes input under-voltage lockout, output under-voltage

protection, and over-temperature protection (thermal

shutdown) to provide safe and smooth operation in all

operating conditions.

 Cycle-by-cycle Current Limit Protection

 Internal Soft-Start (Typ 1.5ms) or Externally

Adjustable, Pre-biased Compatible Soft-Start (Only

for Option with SS Pin)

 Power Good Indicator (90%) (Only for Option with

PGOOD Pin)

Ordering Information

( )

RT6255A/B

 Output Under-Voltage Protection (UVP)

 Over-Temperature Protection (OTP)

 Input Under-Voltage Lockout (UVLO)

 Available in TSOT-23-6 (FC) and TSOT-23-8 (FC)

Packages

Package Type

J6F : TSOT-23-6 (FC)

J8F : TSOT-23-8 (FC)

Lead Plating System

G : Green (Halogen Free and Pb Free)

Pin8 Definition

Empty means PGOOD pin

S : SS pin

Applications

 Set Top Box

 Portable TV

 Access Point Router

 DSL Modem

 LCD TV

UVP Option

H : Hiccup

PSM/PWM

A : PSM/PWM

B : Force-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.

is a registered trademark of Richtek Technology Corporation.

DS6255A/B-02 March 2017

www.richtek.com

12 3 4 5 6 7...20

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