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| NCV8141 Datasheet, PDF (7/12 Pages) ON Semiconductor – 5.0 V, 500 mA Linear Regulator with ENABLE, RESET, and Watchdog | |||
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NCV8141
VOUT When Watchdog is Held
High and ENABLE = HIGH
VIN
ENABLE
WDI 0 V
RESET 0 V
VOUT 0 V
Batt
Batt
POR Normal Operation
VOUT When Watchdog is Held Low
and ENABLE = HIGH
VIN
ENABLE
WDI 0 V
RESET 0 V
VOUT 0 V
Batt
Batt
POR Normal Operation
WDI held High
WDI held Low
VOUT When Watchdog is too Slow
and ENABLE = HIGH
VIN
ENABLE
WDI 0 V
RESET 0 V
VOUT 0 V
Batt
Batt
POR Normal Operation
Slow WDI signal
VIN
WDI Held High After a Normal Period ENABLE
of Operation; ENABLE = LOW
WDI 0 V
RESET 0 V
VOUT 0 V
WDI Held Low or is too Slow after
a Normal Period of Operation;
ENABLE = LOW
VIN
ENABLE
WDI 0 V
RESET 0 V
VOUT 0 V
Batt
Batt
POR Normal Operation WDI Sleep Mode POR Normal Operation
high
Batt
Batt
POR
Normal
Operation
WDI Sleep Mode POR Normal Operation
low
Figure 6. Timing Diagrams for Watchdog and ENABLE Functions
VOUT
VR(HI)
VR(LO)
RESET
VR(PEAK)
VR(LO)
tPOR
Figure 7. Power RESET and Power Down
VOUT
VOUT â4.5%
< 6.0 ms ⥠6.0 ms
RESET
5.0 V
tPOR
Figure 8. Undervoltage Triggered RESET
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