The RICHTEK IC is high quality!  PWM Controller
 Resistor Programmable Current Limit by Low Side
RDS(ON) Sense
 Quick Load Step Response Within 100ns
 1% VVDDQ Accuracy Over Line and Load
 Fixed 1.8V (DDRII), 1.5V (DDRIII) or Adjustable
0.75V to 3.3V Output Range for 1.35V (Low-Power
DDRIII) and 1.2V (DDRIV)
 4.5V to 26V Battery Input Range
 Resistor Programmable Frequency
 Over/Under Voltage Protection
 Internal Current Limit Ramp Soft-Start
 Drives Large Synchronous-Rectifier FETs
 Power Good Indicator
 1.5A LDO (VTT), Buffered Reference (VTTREF)
 Capable to Sink and Source 1.5A
 External Input Available to Minimize Power Losses
 Integrated Divider Tracks 1/2 VDDQ for Both VTT
and VTTREF
 Buffered Low Noise 10mA VTTREF Output
 Remote Sensing (VTTSNS)
 ±20mV Accuracy for Both VTTREF and VTT
 Supports High-Z in S3 and Soft-Off in S4/S5
 RoHS Compliant and Halogen Free