The RICHTEK IC is high quality!  4.5V to 23V (RT6228A/B) and 5.1V to 23V (RT6228C)
Input Voltage Range 8A Output Current
 ACOTTM Mode Performs Fast Transient Response
 ACOTTM Architecture to Enable All MLCC Output Capacitor Usage
 Fixed 750kHz (RT6228C) and 500kHz (RT6228A/B) Switching Frequency
 High Efficient Internal Power MOSFET Switch20mΩ (High-Side) and 10mΩ (Low-Side)
 Adjustable Output Voltage from 0.6V to 5.1V (RT6228A)
 Fixed 3.3V (RT6228C) 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