1FEATURES
2• Automotive Application Reliability
• 3% Output Voltage Tolerance
• Insensitive to Radiated RFI
• Dropout Voltage Less than 800 mV with 250
mA Output Current
• Externally Programmed Reset Delay Interval
• Keep-Alive Feature with 2 Logic Control Inputs
• 60V Load Dump Transient Protection
• Thermal Shutdown
• Short Circuit Protection and Disable Safety
Features
• Reverse Battery Protection
• Low OFF Quiescent Current, 50 μA Maximum
• Wide Operating Temperature Range −40°C to
+125°C
• TO-263 and 20-Pin Power Surface Mount
Packages
• Lead Form Compatible with TLE4267 TO-220
Regulator

DESCRIPTION
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 high.
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 MHz).