General Description
The MAX1765 is a high-efficiency, low-noise, step-up DC-DC converter intended for use in battery-powered wireless applications. This device operates at a high 1MHz fixed frequency while maintaining an exceptionally low quiescent supply current (200µA). Its small external components and tiny package make this device an excellent choice for small hand-held applications that require the longest possible battery life.

Features
♦ High-Efficiency Step-Up Converter
   Up to 93% Efficiency
   Adjustable Output from +2.5V to +5.5V
   Up to 800mA Output
   PWM Synchronous-Rectified Topology
   1MHz Operating Frequency (or Sync)
♦ LDO Linear Regulator
   500mA LDO Linear Regulator
   2.85V Linear Regulator Output or Adjustable
   (1.25V to 5V)
   Low 125mV Dropout at 500mA
♦ +0.7V to +5.5V Input Range
♦ 0.1μA Logic-Controlled Shutdown
♦ Adjustable Inductor Current Limit and Soft-Start
♦ Thermal Shutdown
♦ 1.5W, 16-Pin TSSOP-EP Package Available

Applications
   Wireless Handsets
   PCS Phones
   Palmtop Computers
   Personal Communicators
   Hand-Held Instruments
   Portable Audio Players