STM6600FS22DM6E 데이터 시트보기 (PDF) - STMicroelectronics

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STM6600FS22DM6E

Smart push-button on/off controller with Smart Reset™ and power-on lockout

STMicroelectronics 

Waveforms

STM6600 - STM6601

Figure 20. Undervoltage detected for <tSRD

VCC(1)

VCC

undervoltage

detected

VCC-Min

VTH+

VTH–

processor interrupt starts power-down sequence

tSRD(2)

set by CSRD

processor sets PSHOLD low

PB status

ignored

and EN is deasserted

accordingly

VCCLO

PSHOLD

INT

V CC

under-

voltage

detection

ignored

PB status ignored

EN

tDEBOUNCE

tINT_Min

tEN_OFF

AM00254v1

1. VCC goes above VTH+ within tSRD thus power is not disabled after tSRD expires.

2. tSRD period is set by external capacitor CSRD.

Figure 21. Undervoltage detected for >tSRD

VCC

undervoltage

detected

VCC is below VTH+ even after tSRD expires

thus power is disabled (EN goes low) and

PB is monitored for regular startup

VCC(1)

VCCLO

PSHOLD

VCC-Min

INT

VTH+

VTH–

tSRD(2)

set by CSRD

VCC

under-

voltage

detection

ignored

PB status ignored

PB status

EN

ignored

tDEBOUNCE

tINT_Min

tEN_OFF

AM00255v1

1. After tSRD expires VCC is still insufficient (below VTH+) thus power is disabled (EN goes low or EN goes high).

2. tSRD period is set by external capacitor CSRD.

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Doc ID 15453 Rev 7

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