General Description
The MAX1658/MAX1659 linear regulators maximize battery life by combining ultra-low supply currents and low-dropout voltages. They feature Dual Mode™ operation, which presets the output to 3.3V (MAX1658) or 5V (MAX1659), or permits it to be adjusted between 1.25V and 16V. The regulator supplies up to 350mA, with a typical dropout of 650mV for the MAX1658 and 490mV for the MAX1659. With their p-channel MOSFET pass transistor, these devices maintain a low quiescent current from zero output current to the full 350mA, even in dropout. They support input voltages ranging from 2.7V to 16.5V.

Features
● Wide Input Voltage Range: 2.7V to 16.5V
● Low, 490mV Dropout at 350mA Output Current
   (MAX1659)
● 30μA Supply Current
● 1μA Max Shutdown Current
● High-Power (1.2W) 8-Pin SO Package
● Dual Mode Operation Output:
   • Fixed 3.3V (MAX1658)
   • Fixed 5.0V (MAX1659)
      or Adjustable (1.25V to 16V)
● Thermal-Overload Protection
● Current-Limit Protection
● Reverse-Battery Protection

Applications
● Digital Cordless Phones
● PCS Phones
● Cellular Phones
● PCMCIA Cards
● Modems
● Hand-Held Instruments
● Palmtop Computers
● Electronic Planners