RT6233A/B
3A Peak, 18V, 500kHz, ACOT
TM
Step-Down Converter
General Description
The RT6233A/B is a high-efficiency, monolithic
synchronous step-down DC-DC converter that can
deliver up to 3A peak output current from a 4.5V to 18V
input supply. The RT6233A/B adopts ACOT
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 current
protection, and thermal shutdown.
Features
Integrated 195m/105m MOSFETs
4.5V to 18V Supply Voltage Range
500kHz Switching Frequency
ACOT Control
0.8V
1.5% Voltage Reference
Adjustable Soft-Start
Power Good Indicator
Monotonic Start-Up into Pre-biased Outputs
Input Under-Voltage Lockout
Over-Current Protection and Hiccup
Applications
Ordering Information
RT6233A/B
Package Type
QW : WDFN-8L 2x3 (W-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
UVP Option
H : Hiccup
A : PSM Mode
B : PWM Mode
Note :
Richtek products are :
Set-Top Boxes
Portable TVs
Access Point Routers
DSL Modems
LCD TVs
Marking Information
RT6233AHGQW
0T : Product Code
W : Date Code
0TW
RT6233BHGQW
0S : Product Code
W : Date Code
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
0SW
Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
RT6233A/B
V
IN
C
IN
LX
Enable
PGOOD
EN
PGOOD
FB
R2
SS
C
SS
GND
R1
C
FF
C
OUT
VIN
BOOT
C
BOOT
L
V
OUT
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6233A/B-02
December
2018
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
