The RICHTEK IC is high quality!  Wide Input Voltage Range 4.5V to 60V 4V to 60V (Soft-start is finished)
 Wide Output Voltage Range : 0.8V to VIN
 0.8V ±1% Reference Accuracy
 Peak Current Mode Control
 Integrated 80mΩ High-Side MOSFET
 Low Quiescent Current : 100μA
 Low Shutdown Current : 2.25μA
 Adjustable Switching : 100kHz to 2.5MHz
 Synchronizable Switching : 300kHz to 2.2MHz
 Power Saving Mode (PSM) at Light Load
 Low Dropout at Light Loads with Integrated Boot Recharge FET
 Externally Adjustable Soft-Start by Part Number Option
 Power Good Indication by Part Number Option
 Enable Control
 Adjustable UVLO Voltage and Hysteresis
 Built-In UVLO, UVP, OVP, OCP, OTP
Simplified Application Circuit
Applications
 12V, 24V and 48V Power Systems
 GPS, Entertainment