STM6600 Datasheet, PDF (20/51 Pages) STMicroelectronics – Smart push-button on/off controller with Smart ResetTM and power-on lockout

Waveforms
STM6600 - STM6601
Figure 13. Power-up on STM660x with voltage dropout
Push-button pressed and VCC goes above VTH+ and
PB connected to GND
tDEBOUNCE is counted again
V_TH+
VCC
VCC_LO
VCC
drop
VCC
under-
voltage
detected
V_TH–
V_CC–Min
(1)
PB
(2)
PS_HOLD
INT ⁽³⁾
internal pull-down resistor
connected to PS_HOLD input
INT signal is held high during power-up
EN
RST
< t _DEBOUNCE
tDEBOUNCE
t_REC
< t _{ON_BLANK}
1. PB detection on falling and rising edges.
2. Internal pull-down resistor 300 kΩ is connected to PS_HOLD input during power-up.
3. INT signal is held high during power-up.
AM00249v2
20/51
Doc ID 15453 Rev 7