®
RT6206A
5.5A, 18V, 650kHz, ACOTTM Synchronous Step-Down Converter
General Description
Features
ACOTTM Mode Enables Fast Transient Response
4.5V to 18V Input Voltage Range
5.5A Output Current
The RT6206Ais a synchronous step-downDC/DC converter
withAdvanced Constant On-Time (ACOTTM) mode control.
It achieves high power density to deliver up to 5.5Aoutput
current from a 4.5V to 18V input supply. The proprietary
ACOTTM mode offers an optimal transient response over a
wide range of loads and all kinds of ceramic capacitors,
which allows the device to adopt very low ESR output
capacitor for ensuring performance stabilization. In
addition, RT6206Akeeps an excellent constant switching
frequency under line and load variation and the integrated
synchronous power switches with the ACOTTM mode
operation provides high efficiency in whole output current
load range. Cycle-by-cycle current limit provides an
accurate protection by a valley detection of low side
MOSFET and external soft-start setting eliminates input
current surge during startup. Protection functions include
thermal shutdown for RT6206A.
35mΩ Internal Low Side N-MOSFET
Advanced Constant On-Time Control
Support All Ceramic Capacitors
Up to 95% Efficiency
Adjustable Output Voltage from 0.765V to 7V
Adjustable Soft-Start
Cycle-by-Cycle Current Limit
Input Under-Voltage Lockout
Thermal Shutdown
RoHS Compliant and Halogen Free
Applications
Industrial and Commercial Low Power Systems
Computer Peripherals
LCDMonitors and TVs
The RT6206A are available in the TSSOP-14 (Exposed
pad), SOP-8 (Exposed Pad) and WDFN-10L 3x3
packages.
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Simplified Application Circuit
RT6206A
VIN
SW
V
OUT
V
IN
VINR*
BOOT
FB
Enable
EN
Power Good
PGOOD*
SS
VREG5
GND*
PGND
* : VINR, GND pin for TSSOP-14 (Exposed Pad) only.
* : PGOOD pin for TSSOP-14 (Exposed Pad) and WDFN-10L 3x3 only.
Copyright 2015 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS6206A-03 September 2015
www.richtek.com
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