RT6211A/B
1.5A, 18V, 500kHz, ACOT
TM
Step-Down Converter
General Description
The RT6211A/B is a high-efficiency, monolithic
synchronous step-down DC-DC converter that can
deliver up to 1.5A output current from a 4.5V to 18V
input supply. The RT6211A/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 230m/130m MOSFETs
4.5V to 18V Supply Voltage Range
500kHz Switching Frequency
ACOT Control
0.8V
1.5% Voltage Reference
Internal Start-Up from Pre-biased Output Voltage
Compact Package : SOT-23-6 pin
High/Low Side Over-Current Protection and
Hiccup
V
OUT
Range 0.8V to 6.5V
Applications
Ordering Information
RT6211A/B
Package Type
E : SOT-23-6
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
RT6211AHGE
3J=DNN
3J= : Product Code
DNN : Date Code
RT6211BHGE
39=DNN
39= : Product Code
DNN : Date Code
RoHS compliant and compatible with the current
requirements of IPC/JEDEC J-STD-020.
Suitable for use in SnPb or Pb-free soldering processes.
Simplified Application Circuit
RT6211A/B
BOOT
VIN
C
IN
LX
Enable
EN
GND
FB
R2
R1
C
FF
C
OUT
V
IN
C
BOOT
L
V
OUT
Copyright © 2018 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6211A/B-07
September 2018
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
