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General Description

The MAX1735 negative-output, low-dropout linear regulator operates from a -2.5V to -6.5V input and delivers a guaranteed 200mA with a low 80mV dropout. The high accuracy (±1) output voltage is preset or can be adjusted from -1.25V to -5.5V with an external resistive voltage-divider.

An internal N-channel MOSFET allows for a low 85μA quiescent current virtually independent of the load, making this device ideal for battery-powered portable equipment, such as PDAs, mobile phones, cordless phones, and wireless data modems.

The device is available in several preset output voltage versions: -5.0V, -3.0V, and -2.5V. All versions offer a 1nA low-power shutdown mode, short-circuit protec tion, and thermal overload protection. The device is offered in a tiny 5-pin SOT23 package.

Features

? Guaranteed 200mA Output Current

? Low 80mV Dropout Voltage at 200mA

? Low 85μA Quiescent Supply Current

? Low 1nA Current Shutdown Mode

? Stable with 1μF COUT

? PSRR >60dB at 100Hz

? Thermal Overload Protection

? Short-Circuit Protection

? -5.0V, -3.0V, or -2.5V Output Voltage

or Adjustable (-1.25V to -5.5V)

? Tiny SOT23-5 Package

Applications

Disk Drives

Modems

Instrumentation Amplifiers

Notebook Computers

Mobile and Cordless Telephones

PCMCIA Cards

GaAsFET Bias

Mobile Wireless Data Modems

PDAs and Palmtop Computers