®
RT6220
6A, 23V, 500kHz, ACOT
TM
Synchronous Buck Converter
General Description
The RT6220 is a synchronous Buck converter with
Advanced Constant On-Time (ACOT
TM
) mode control,
which provides a very fast transient response with no
external compensators. The RT6220 operates from 4.5V
to 23V input voltage, provides complete protection
functions including Over Current Protection (OCP), Under
Voltage Protection (UVP) and Over Voltage Protection
(OVP). This IC also provides a 1.5ms internal soft-start
function and an open-drain power good indicator.
Features
4.5V to 23V Input Voltage Range
Adjustable from 0.6V to 5V Output Range
Up to 98% Duty for 2S Battery Application
500kHz Switching Frequency
ACOT
TM
Mode Performs Fast Transient Response
Integrated MOSFETs
�½
31mΩ of High-Side MOSFET
Ω
�½
20mΩ of Low-Side MOSFET
Ω
Supports MLCC Output Capacitors
Internal Soft-Start (1.5ms typ)
Built-in OVP/UVP/OCP
Power Good Indicator
Thermal Shutdown
Ordering Information
RT6220
Package Type
QUF : UQFN-16L 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
PWM Operation / VOUT Protection
A : with DEM/Latch
AH : with DEM/Hiccup
BL : without DEM/Latch
BH : without DEM/Hiccup
Note :
Richtek products are :
�½
Applications
Laptop Computers
Tablet PCs
Networking Systems
Servers
Personal Video Recorders
Flat Panel Television and Monitors
Distributed Power Systems
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.
�½
Simplified Application Circuit
V
IN
C
IN
Chip Enable
C
EN
R
BYP
C
BYP
PGND
AGND
PGOOD
VCC
EN
VIN
RT6220
SW
VOUT
FB
R
PGOOD
V
CC
C
VCC
R1
R2
C
OUT
BOOT
R
B
C
B
L
V
OUT
V
SYS
VBYP
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6220-10
December 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
