350mA, 16.5V Input, Low-Dropout Linear Regulators

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.

The MAX1658/MAX1659 feature a 1µA shutdown mode, reverse battery protection, short-circuit protection, and thermal shutdown. They are available in a special high-power (1.2W), 8-pin SO package designed specifically for compact applications.

Applications

* Cell Phones * Digital Cordless Phones * Electronic Planners * Handheld Instruments (PDAs, Palmtops) * Modems * Palmtop Computers * PCMCIA Cards * PCS Phones

* 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