Overview
The L88R05 Series is a series of low-saturation voltage regulator ICs that are equipped with a function that generates a reset signal when the power supply for a microcontroller system is turned on or off.

FEATUREs
• Minimum I/O voltage difference is small (0.5 V typ.),
   making power conservation possible, and makes smaller heatsink and
   transformers possible.
• External capacitor for reset signal output delay time adjustment.
• Sink/source reset output provides compatibility with logic circuitry
   that has an internal pull-down resistor. Active pull-up
   facilitates noise suppression.
• Various types of protective circuits on chip
   (fold back current limiting, thermal protection).
• The package is the TO220-5H; this package facilitates designs
   for the radiation of heat during the mounting process.
  
Applications
• Prevents malfunction when the microcontroller power supply
   is turned on or off.
• Designed to handle malfunction caused by momentary power
   interruptions.
• Suited for portable electronic equipment, mobile electronic
   equipment, and other battery-powered equipment with little
   capacity to handle fluctuation in input voltage; also suited
   for equipment with large fluctuations in the primary power
   supply.