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RT6255AHSGJ6F

更新时间: 2024-02-11 11:00:36
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

RT6255AHSGJ6F 数据手册

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®
RT6255A/B  
5A, 18V, 500kHz, ACOTTM Step-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 (ACOTTM) 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 (ACOTTM) 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.  
Copyright 2017 Richtek Technology Corporation. All rights reserved.  
©
is a registered trademark of Richtek Technology Corporation.  
DS6255A/B-02 March 2017  
www.richtek.com  
1

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