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RT6257A Datasheet, PDF (1/15 Pages) Richtek Technology Corporation – ACOT Step-Down Converter | |||
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RT6257A/B
6A, 18V, 500kHz, ACOTTM Step-Down Converter
General Description
Features
The RT6257A/B is a high-efficiency, monolithic ï¬ 4.5V to 18V Input Voltage Range
synchronous step-down DC-DC converter that can deliver ï¬ 6A Output Current
up to 6A output current from a 4.5V to 18V input supply. ï¬ 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 ï¬ Low Output Ripple and Allows Ceramic Output
frequency. Cycle-by-cycle current limit provides protection
Capacitor
against shorted outputs and soft-start eliminates input ï¬ 500kHz Switching Frequency
current surge during start-up. Fault conditions also include ï¬ High Efficient Internal Power MOSFET Switch
output under voltage protection and thermal shutdown.
Optimized for Lower Duty Cycle Applications
ï¬ Integrated 30mΩ/20mΩ MOSFETs
Ordering Information
RT6257A/B
ï¬ Adjustable Output Voltage from 0.6V to 5V
ï¬ Internal Soft-Start (1.5ms typ.)
Package Type
J6F : TSOT-23-6 (FC)
ï¬ Built-In UVP/OTP
ï¬ Input Under Voltage Lockout
ï¬ TSOT23-6 (FC) Package
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
Applications
ï¬ Set Top Box
PSM/PWM
A : PSM/PWM
B : Force-PWM
ï¬ Portable TV
ï¬ Access Point Router
ï¬ DSL Modem
Note :
ï¬ LCD TV
Richtek products are :
ï½ RoHS compliant and compatible with the current require-
ments of IPC/JEDEC J-STD-020.
ï½ 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-01 October 2016
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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