1.5A regulator Built-in Step-Down micro DC/DC Converters

0.5A
http://www.digikey.com/catalog/en/partgroup/xcl221-and-xcl222-series/59852

1.5A 5V->3.3V switching regulator
in a 2.5 x 3.2 x 1mm module,
with integrated inductor.
$3USD qty 1
 DigiKey ( ask )


Input Voltage
  2.7V～5.5V

Output Voltage
  0.8V～3.6V

Control Methods
  HiSAT-COT Control
  100% Duty cycle
  HiSAT-COT+PWM/PFM

Protection Circuits
 Thermal Shut Down
 Current Limit Circuit (Drop)
 Short Circuit Protection

Functions
 Soft-Start
 UVLO
 CL Discharge

Capacitor
 Low ESR Ceramic

Environmentally Friendly
 EU RoHS compliant, Pb free


Info and Src:
https://www.torexsemi.com/products/built-in-dcdc-converters/series/?name=xcl214