The RICHTEK IC is high quality!  Input Voltage Range from 2.5V to 6V
 Integrated 100mΩ and 70mΩ FETs
 100% Duty Cycle for Lowest Dropout
 Internal Reference Voltage with 1% Accuracy
 1.2MHz Typical Switching Frequency
 Power Saving Mode for Light Loads (RT5752A)
 Advanced Constant On-Time (ACOT® ) Control
 Internal Soft Startup (1.5ms)
 Enable Control Input
 Power Good Indicator
 Negative Over-Current Protection (RT5752B)
 Fully Protection with UVLO, OVP, UVP, Cycle-byCycle Current Limit and OTP
 RoHS Compliant and Halogen Free
Applications
 Mobile Phones and Handheld Devices
 STB, Cable Modem, and xDSL Platforms
 WLAN ASIC Power / Storage (SSD and HDD)
 General Purpose for POL LV Buck Converters