MAX1735

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


Application

Disk Drives
Modems
Instrumentation Amplifiers
Notebook Computers
Mobile and Cordless Telephones
PCMCIA Cards
GaAsFET Bias
Mobile Wireless Data Modems
PDAs and Palmtop Computers


Pinout




Specifications

IN, SET to GND ................................................... -7.0V to +0.3V
SHDN to GND  ........................................... (V_IN - 0.3)V to +7.0V
OUT to GND  ..............................................(V_IN - 0.3)V to +0.3V
Output Short-Circuit Duration ......................................Indefinite
Continuous Power Dissipation (TA = +70°C)
5-Pin SOT23 (derate 7.1mW/°C above +70°C)........... 571mW
Operating Temperature Range .......................-40°C to +85°C
Junction Temperature....................................................+150°C
Storage Temperature Range ....................... -65°C to +150°C
Lead Temperature (soldering, 10s) ............................. +300°C


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 protection, and thermal overload protection. The device is offered in a tiny 5-pin SOT23 package.