Overview
The L78LR05 is voltage regulator IC that performs the reset signal generating function when the power supply of a microcomputer system is turned ON/OFF. The L78LR05 is convenient for battery backup system at the time of power failure. The reset threshold voltage VRT is ranked as shown below.

Features
• 5V, 150mA output.
• Capable of generating a microcomputer reset signal.
• No battery-regulator switching circuit required at the battery backup mode (Output leakage current : 2μA or less).
• An external capacitor can be used to set the reset output delay time.
• Applicable to the power supply of CMOS, NMOS micro computers.
• Especially suited for use as an on-board regulator for a microcomputer system.
• Small-sized power package TP-5H permitting the equipment to be made compact.
• The allowable power dissipation can be increased by being surface-mounted on the board.
• Capable of being mounted in a variety of methodes be cause of various lead forming versions available.
• On-chip protectors (overcurrent limiter, ASO protector, thermal protector).

Applications
• Prevention of malfunction that may occur when the power supply of a microcomputer is turned ON/OFF.
• Measures taken against abnormal operations that may occur at the time of instantaneous break of power supply.
• Direct battery backup for SRAM.