®
RT6220DH
6A, 23V, 500kHz, ACOTTM Synchronous Buck Converter
General Description
The RT6220DH is a synchronous Buck converter with
Advanced Constant On-Time (ACOTTM) mode control,
which provides a very fast transient response with no
external compensators. The RT6220DH 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.
Ordering Information
RT6220DH
Package Type
QUF : UQFN-16L 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
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.
Features
4.5V to 23V Input Voltage Range
Adjustable from 0.6V to 5V Output Range
500kHz Switching Frequency
ACOTTM Mode Performs Fast Transient Response
Integrated MOSFETs
31mΩ of High-Side MOSFET
20mΩ of Low-Side MOSFET
Supports MLCC Output Capacitors
Internal Soft-Start (1.5ms typ)
Built-in OVP/UVP/OCP
Power Good Indicator
Thermal Shutdown
Applications
Laptop Computers
Tablet PCs
Networking Systems
Servers
Personal Video Recorders
Flat Panel Television and Monitors
Distributed Power Systems
Simplified Application Circuit
VIN
Chip Enable
CIN
CEN
VSYS
RBYP
CBYP
VIN BOOT
RT6220DH
EN
VBYP
SW
VOUT
FB
PGND
AGND
PGOOD
VCC
CB
L
RPGOOD
VCC
CVCC
VOUT
R1 COUT
R2
Copyright ©2017 Richtek Technology Corporation. All rights reserved.
DS6220DH-00 September 2017
is a registered trademark of Richtek Technology Corporation.
www.richtek.com
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