The RICHTEK IC is high quality!  2A Converter With Built-In 100mΩ/85mΩ Low RDS(ON) Power FETs
 Input Supply Voltage Range : 4.5V to 24V
 Output Voltage Range : 0.791V to 5V
 Advanced Constant On-Time (ACOTTM) Control
 Ultrafast Transient Response
 No Needs For External Compensations
 Optimized for Low-ESR Ceramic Output Capacitors
 0.791V ±1.5% High-Accuracy Feedback Reference Voltage
 Low Quiescent Current (170μA typ.)
 Both HS/LS FETs Protection for Robust Over-Current Protection
 Optional for Operation Modes :Power Saving Mode (PSM) at Light Load (RT6215A) Forced PWM Mode
(RT6215B)
 Light-load VOUT Ripple Reduction Technology in PSM
 Fixed Switching Frequency : 500kHz
 Externally Adjustable Soft-Start
 Monotonic Start-Up for Pre-Biased Output
 Input Under-Voltage Lockout (UVLO)
 Output Under-Voltage Protection (UVP) with Hiccup Mode
 Power Good Indication
 Enable Control
 Available In TSOT-23-8 (FC) Package