®
RT6226A/B/C
6A, 23V Synchronous Step-Down Converter with 3.3V/5V LDO
General Description
The RT6226A/B/C is an advanced constant on-time
(ACOT
TM
) mode synchronous buck converter. The main
control loop of the RT6226A/B/C using an advanced
constant on-time (ACOT
TM
) mode control which provides
a very fast transient response. The RT6226A/B operates
from 4.5V to 23V input voltage and the RT6226C operates
from 5.1V to 23V. For the RT6226A, the output voltage
can be programmed between 0.6V to 5.1V.
Features
4.5V to 23V (RT6226A/B) and 5.1V to 23V (RT6226C)
Input Voltage Range 6A Output Current
ACOT
TM
Mode Performs Fast Transient Response
ACOT
TM
Architecture to Enable All MLCC Output
Capacitor Usage
Fixed 750kHz (RT6226C) and 500kHz (RT6226A/B)
Switching Frequency
High Efficient Internal Power MOSFET Switch-
30mΩ (High-Side) and 15mΩ (Low-Side)
Ω
Ω
Adjustable Output Voltage from 0.6V to 5.1V
(RT6226A)
Fixed 3.3V (RT6226C) LDO Output Supplies 100mA
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)
300kHz CLK for External Charge Bump
Applications
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
Ordering Information
RT6226A/B/C
Package Type
QUF : UQFN-12HL 3x3 (FC) (U-Type)
Lead Plating System
G : Green (Halogen Free and Pb Free)
Output Voltage
A : Adjustable
B : 3.3V
C : 5.1V
Note :
Richtek products are :
�½
Marking Information
RT6226AGQUF
KA= : Product Code
KA=YM
DNN
YMDNN : Date Code
RT6226BGQUF
KE= : Product Code
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.
KE=YM
DNN
YMDNN : Date Code
�½
RT6226CGQUF
KD= : Product Code
KD=YM
DNN
YMDNN : Date Code
Copyright
©
2019 Richtek Technology Corporation. All rights reserved.
is a registered trademark of Richtek Technology Corporation.
DS6226A/B/C-03
September 2019
www.richtek.com
1
RICHTEK [ RICHTEK TECHNOLOGY CORPORATION ]
