NCV8518B 데이터 시트보기 (PDF) - ON Semiconductor

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NCV8518B

Low Dropout Linear Regulator with Watchdog, Wake Up, RESET, and ENABLE

ON Semiconductor 

VIN, ENABLE

NCV8518B

TIMING DIAGRAMS

RESET

Wake Up

RESET High

to Wake Up

Delay Time

WDI

Wake Up

Duty Cycle = 50%

Wake Up Duty Cycle will be 50% when the WDI

pulse occurs at the low state of the Wake Up Signal.

VOUT

POR

Power Up

Min WDI falling

edge delay after

Wake Up rising

edge

Microprocessor

Sleep Mode

Normal Operation with Varying Watchdog Signal

Figure 2. Power Up, Sleep Mode and Normal Operation

VIN, ENABLE

RESET

Wake Up

WDI

RESET Delay Time

RESET High

to Wake Up

Delay Time

VOUT

POR

Wake Up Period

Figure 3. Error Condition: Watchdog Remains Low and a RESET is Issued

RESET

Wake Up

WDI

Wake Up

Response to Reset

Wake Up

Period

VIN, ENABLE

VOUT

POR

RESET Threshold

VOUT Decreasing

Power Down

POR

Wake Up

Response to

WDI

Figure 4. Power Down, Restart Sequence, and Wake Up Response to WDI

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