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.

特性 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