The RICHTEK IC is high quality!  Input Voltage Range : 3.9V to 14V
 Synchronous 1.5MHz/0.75MHz Switching Frequency 95% Max. Duty
 Up to 92%/94% Peak Efficiency at VIN = 9V/5V
 VIN Over-Voltage Protection : 14.5V
 VIN Under-Voltage Protection : 3.8V
 VIN Under-Voltage-Lock-Out : 3.3V
 Fault Detection (VIN and VBAT Monitoring)
 Programmable Minimum Input Voltage Range :3.9V to 13.4V (0.1V/Step)
 Programmable Battery Voltage Regulation Range :3.8V to 5.06V (0.02V/Step)
 Programmable End of Charge Range : 0.6A to 1.6A(0.1A/Step)
 Programmable Average Output Current Regulation Range : 0.6A to 3A (0.1A/Step)
 Junction Temperature Monitor : 60°C to 116°C (4°C/Step)
 VIN Minimum Input Voltage Regulation (MIVR) : ±3%
 Battery CV (Constant Voltage) Regulation : ±1%
 Output CC (Constant Current) Regulation, Output Current < 1A : ±100mA (VIN = 9V/12V)
 Output CC (Constant Current) Regulation, Output Current > 1A : ±10% (VIN = 9V/12V)
 Junction Temperature Monitor Accuracy : ±3°C
 Thermal Shutdown : 160°C