Tiny Package, High Efficiency, Step-up DC/DC Converter(兼容RT9266)

General Description
The HW9266 is a compact, high efficiency, and low voltage step-up DC/DC converter with an Adaptive Current Mode PWM control loop, includes an error amplifier, ramp generator, comparator, switch pass element and driver in which providing a stable and high efficient operation over a wide range of load currents. It operates in stable waveforms without external compensation. The low start-up input voltage below 1V makes HW9266 suitable for 1 to 4 battery cells applications of providing up to 300mA output current. The 450kHz high switching rate minimized the size of external components. Besides, the 17uA low quiescent current together with high efficiency maintains long battery lifetime. The output voltage is set with two external resistors. Both internal 2A switch and driver for driving external power devices (NMOS or NPN) are provided.

Features
   1.0V Low Start-up Input Voltage
   High Supply Capability to Deliver 3.3V 100mAwith
   Alkaline Cell
   17uAQuiescent (Switch-off) Supply Current
   Zero Shutdown Mode Supply Current
   90%Efficiency
   450kHz Fixed Switching Frequency
   Providing Flexibility forUsing Internal and External Power Switches
   Small SOT-23-6 & SOT-89-5 Package
   RoHS Compliant and 100%Lead (Pb)-Free

Applications
  PDA
  DSC
  LCDPanel
  RF-Tags
  MP3
  Portable Instrument
  Wireless Equipment