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