The LM9070 is a 5V, 3% accurate, 250 mA low-dropout voltage regulator. The regulator
features an active low delayed reset output flag which can be used to reset a microprocessor system
on turn-ON and in the event that the regulator output falls out of regulation for any reason. An
external capacitor programs a delay time interval before the reset output can return
Designed for automotive application the LM9070 contains a variety of protection features
such as reverse battery, over-voltage shutdown, thermal shutdown, input transient protection and a
wide operating temperature range.
A unique two-input logic control scheme is used to enable or disable the regulator
output. An ON/OFF input can be provided by an ignition switch derived signal while a second,
Keep-Alive input, is generated by a system controller. This allows for a system to remain ON after
ignition has been switched OFF. The system controller can then execute a power-down routine and
after which command the regulator OFF to a low quiescent current state (60 μA max).
Design techniques have been employed to allow the regulator to remain operational and not
generate false reset signals when subjected to high levels of RF energy (300V/m from 2 MHz to 400
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