General Description
The RT6226A/B/C is an advanced constant on-time
(ACOTTM) mode synchronous buck converter. The main
control loop of the RT6226A/B/C using an advanced
constant on-time (ACOTTM) 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.

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

Features
 4.5V to 23V (RT6226A/B) and 5.1V to 23V (RT6226C)
Input Voltage Range 6A Output Current
 ACOTTM Mode Performs Fast Transient Response
 ACOTTM 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)
 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