DS6257A Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – 6A, 18V, 500kHz, ACOTTM Step-Down Converter

®
RT6257A/B
6A, 18V, 500kHz, ACOT^TM Step-Down Converter
General Description
Features
The RT6257A/B is a high-efficiency, monolithic ^{ 4.5V to 18V Input Voltage Range}
synchronous step-down DC-DC converter that can deliver ^{ 6A Output Current}
up to 6A output current from a 4.5V to 18V input supply. ^{ Constant-On-Time Mode to Enables Fast Transient}
The RT6257A/B adopts ACOT architecture to allow the
Response
transient response to be improved and keep in constant ^{ Low Output Ripple and Allows Ceramic Output}
frequency. Cycle-by-cycle current limit provides protection
Capacitor
against shorted outputs and soft-start eliminates input ^{ 500kHz Switching Frequency}
current surge during start-up. Fault conditions also include ^{ High Efficient Internal Power MOSFET Switch}
output under voltage protection and thermal shutdown.
Optimized for Lower Duty Cycle Applications
 Integrated 30mΩ/20mΩ MOSFETs
Ordering Information
RT6257A/B
 Adjustable Output Voltage from 0.6V to 5V
 Internal Soft-Start (1.5ms typ.)
Package Type
J6F : TSOT-23-6 (FC)
 Built-In UVP/OTP
 Input Under Voltage Lockout
 TSOT23-6 (FC) Package
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
Applications
 Set Top Box
PSM/PWM
A : PSM/PWM
B : Force-PWM
 Portable TV
 Access Point Router
 DSL Modem
Note :
 LCD TV
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.
Pin Configuration
(TOP VIEW)
BOOT LX VIN
Marking Information
RT6257AHGJ6F
2K=DNN
2K= : Product Code
DNN : Date Code
6
5
4
2
3
FB EN GND
TSOT-23-6 (FC)
RT6257BHGJ6F
2J=DNN
2J= : Product Code
DNN : Date Code
Copyright ©2016 Richtek Technology Corporation. All rights reserved.
DS6257A/B-00 September 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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