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RT6224D
3A, 18V, 1.4MHz ACOTTM Synchronous Step-Down Converter
General Description
Features
Small Output Voltage at Light Load
High-Side Over-Current Limit
Integrated 90mΩ/45mΩ MOSFETs
4.3V to 18V Supply Voltage Range
1.4MHz Switching Frequency
ACOTTM Control
The RT6224Dis a high-efficiency, monolithic synchronous
step-downDC-DC converter that can deliver up to 3Aoutput
current from a 4.3V to 18V input supply. The RT6224D
adopts ACOTTM architecture to allow the transient
response to be improved and keep in constant frequency.
Cycle-by-cycle current limit provides protection against
shorted outputs and soft-start eliminates input current
surge during start-up. Fault conditions also include output
under-voltage protection, output over-voltage protection,
and thermal shutdown.
0.6V 1.5% Voltage Reference
Monotonic Start-Up into Pre-Biased Outputs
Applications
Set Top Box
Portable TV
Access Point Router
DSL Modem
LCD TV
Ordering Information
RT6224D
Package Type
J6F : TSOT-23-6 (FC)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Pin Configuration
UVP Option
H : Hiccup
(TOP VIEW)
PSM/PWM
SW VIN EN
D : Force-PWM
6
5
2
4
3
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.
BOOTGND FB
TSOT-23-6 (FC)
Simplified Application Circuit
RT6224D
V
BOOT
VIN
EN
IN
V
OUT
SW
Enable
FB
GND
Copyright 2018 Richtek Technology Corporation. All rights reserved.
©
is a registered trademark of Richtek Technology Corporation.
DS6224D-01 August 2018
www.richtek.com
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