STMicroelectronics STM66xx Smart Push-Button On / Off Controller

18 October, 2021

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STMicroelectronics STM6600/STM6601 Smart Push-Button On / Off Controllers with Smart Reset™ and power-on lockout protects against the hazards faced by battery-operated devices. These types of devices include smartphones, digital cameras, and media players. The STM6600/STM6601 controllers enable and disable power for the application depending on push-button states, signals from the processor, and battery voltage. If the battery is excessively discharged or a fault is detected in the power supply, the IC blocks power-up. These devices also implement smart-reset capabilities to enable users to safely recover gadgets that have frozen or crashed during normal operation. The STM6600/STM6601 controllers connect directly to the power and reset buttons and have circuitry to prevent external interference such as electrostatic discharges. These devices feature a very low current consumption of 6µA in normal operation and only 1µA during standby, resulting in virtually no battery drain when the application is turned off.

Features

Operating voltage 1.6V to 5.5V
Low standby current of 1μA
Adjustable smart reset assertion delay time driven by external C_SRD
Power-up duration determined primarily by push-button press (STM6600) or by fixed time period, t_{ON_BLANK} (STM6601)
Debounced PB and SR inputs
PB and SR ESD inputs withstand voltage up to ±15kV (air discharge) ±8kV (contact discharge)
Active high or active low enable output option (EN or EN) provides control of MOSFET, DC-DC converter, regulator, etc.
Secure startup, interrupt, smart reset or power down driven by push-button
Precise 1.5V voltage reference with 1% accuracy

Block Diagram

Application Circuit

more information: https://www.st.com/en/reset-and-supervisor-ics/stm6600.html

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Mike is the founder and editor of Electronics-Lab.com, an electronics engineering community/news and project sharing platform. He studied Electronics and Physics and enjoys everything that has moving electrons and fun. His interests lying on solar cells, microcontrollers and switchmode power supplies. Feel free to reach him for feedback, random tips or just to say hello :-)

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