AN3271

Pin descriptions and typical application hookup

Doc ID 17933 Rev 2

7/29

2

Pin descriptions and typical application hookup

voltage.

PB - push-button input is used to start an application or assert an interrupt during normal

operation or possibly power down the application.

SR - Smart Reset button, when pressed together with PB, can either power down the

application or reset the device regardless of system response.

EN (EN) - active high or active low enable output (device ordering option) can drive various

power switches from PMOS to DC-DC converters, regulators, etc. and therefore switch

by the following events:

●

●

●

Undervoltage condition is detected

●

Long push of PB and SR buttons is detected (valid only for devices with option “EN

deasserted by long push”)

●

only for devices with option “RST deasserted by long push”)

RST - system reset, output is asserted during power-up or after a long push of PB and SR

buttons simultaneously (device option).

the application.

buttons must be held in order to recognize a long push and either reset the system or

disable the system power (based on option used), the constant is 10 s / µF.

is mandatory.