lm9070t National Semiconductor Corporation, lm9070t Datasheet - Page 7

• Manufacturer Part Number: lm9070t
• Description: Low-dropout System Voltage Regulator With Keep-alive On/off Control
• Manufacturer: National Semiconductor Corporation

ON/OFF, Keep-Alive and Safety Latch-Off Control Diagrams
Note: If Keep-Alive is provided by a microprocessor powered by the output voltage of the LM9070, the logic “1” voltage level will track V
as the regulator turns
OUT
OFF.
Keep-Alive Mode; Turn ON with ON/OFF control,
Keep output biased with Keep-Alive input,
Simple ON/OFF control
Turn OFF with Keep-Alive (Keep-Alive low keeps output
(Keep-Alive input must be high to turn OFF output)
ON, Keep-Alive going high turns output OFF)
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Switch ON with ON/OFF input; Keep output
biased with Keep-Alive; Hold ouput ON with
when in Keep-Alive Mode
ON/OFF; Turn OFF with ON/OFF input.
Safety Latch OFF of V
OUT
(Temporary Keep-Alive Mode)
(ON/OFF going high required to turn Output back ON)
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