lm9074ep National Semiconductor Corporation, lm9074ep Datasheet - Page 6

• Manufacturer Part Number: lm9074ep
• Description: Enhanced Plastic System Voltage Regulator With Keep-alive On/off Control
• Manufacturer: National Semiconductor Corporation

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ON/OFF
Input
ON/OFF, Keep-Alive and Safety
Latch-Off Control Diagrams
Control Logic Truth Table
(Continued)
H
↓
↓
H
L
↑
↑
L
biased with Keep-Alive; Hold ouput ON with
Switch ON with ON/OFF input; Keep output
ON/OFF; Turn OFF with ON/OFF input.
Keep-Alive
Input
(Temporary Keep-Alive Mode)
H
X
X
X
X
L
L
L
∆V
OUT
V
Voltage
OUT
Output
≥ −300 mV
0V
5V
5V
0V
5V
5V
≤ 4V
20090820
↑
after delay
Output
Reset
H
H
H
L
L
L
L
6
(ON/OFF going high required to turn Output back ON)
Low quiescent current standby (OFF) condition
Output turns ON
Normal ON condition
Output turns OFF
Output kept ON by Keep-Alive Input
Output remains ON (or turns ON)
Output pulled out of regulation, reset flag generated
Output latches OFF
Safety Latch OFF of V
Operating Condition
OUT
when in Keep-Alive Mode
20090821