®
RT6308A
8A, 23V Synchronous Step-Down Converter
General Description
The RT6308A is an advanced constant on-time (ACOT
TM
)
mode synchronous buck converter. The main control loop
of the RT6308A uses an advanced constant on-time
(ACOT
TM
) mode control which provides a very fast transient
response. The RT6308A operates from 4.5V to 23V input
voltage, and the output voltage can be programmed
between 0.6V to 5.1V.
Features
4.5V to 23V Input Voltage Range 8A Output Current
ACOT
TM
Mode Performs Fast Transient Response
ACOT
TM
Architecture to Enable All MLCC Output
Capacitor Usage
Fixed 500kHz Switching Frequency
High Efficient Internal Power MOSFET Switch-
20mΩ (High Side) and 10mΩ (Low Side)
Ω
Ω
Adjustable Output Voltage from 0.6V to 5.1V
Pre-biased Soft-Start
Cycle-by-Cycle Over Current Protection
Input Under Voltage Lockout
Thermal Shutdown Protection
Output Over/Under Voltage Protection
Ultrasonic Mode (USM)
Ordering Information
RT6308A
Package Type
QUF : UQFN-12HL 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Note :
Richtek products are :
�½
Applications
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
Industrial and Commercial Low Power Systems
Computer Peripherals
LCD Monitors and TVs
Green Electronics/Appliances
Point of Load Regulation for High-Performance DSPs,
FPGAs, and ASICs
Simplified Application Circuit
RT6308A
PGOOD
V
IN
C
IN
V
CC
VCC
C
VCC
LX
C
FF
(Optional)
R
FF
(Optional)
FB
EN
PGND
AGND
BYP
C
BYP
R
BYP
(Optional)
V
BYP
R2
R1
C
OUT
BOOT
VIN
R
BOOT
C
BOOT
L
V
OUT
V
PGOOD
V
ILMT
V
EN
R
EN
ILMT
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6308A-00 October 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
