Accurate voltage supervisor has wide temperature range




General Description

The MIC826 is a low-current, ultra-small, voltage supervisor with manual reset input, watchdog timer, and active-high and active-low push-pull outputs. The reset outputs are asserted and held when the supply voltage falls below the factory-programmed threshold voltage, when the /MR pin is pulled low, or if the watchdog times out. Reset is asserted for the reset timeout delay after the supply voltage increases above the rising threshold voltage or when manual reset input is asserted high.

The MIC826 features an integrated pull-up resistor on the /MR. An active-low push-pull reset output (/RESET) and an active-high reset output (RESET) provide flexibility when interfacing with various microcontrollers, PMICs, or load switches. The watchdog input can be left unconnected for applications that do not require watchdog monitoring.

The MIC826 consumes a quiescent current of only 3.8μA and is offered in a tiny, space-saving, 6-pin 1.6mm x 1.6mm Thin DFN package. It is rated for the –40°C to +125°C temperature range.

Key Features
Precision 1.8V to 5V power supply monitor
±0.5% threshold accuracy at TA = +25°C
±1.5% threshold accuracy from TA = –40°C to +125°C
3.8μA supply current (MIC826S/R/T/W/Y/Z)
4.8μA supply current (MIC826L/M)
Manual reset input
140ms (min.) reset timeout period
1.6s (typ.) watchdog timeout period
Float watchdog timer input to disable watchdog timer
Active-high and active-low push-pull outputs
Guaranteed reset output valid to VCC = 1V
−40°C to +125°C junction temperature range
6-pin 1.6mm x 1.6mm x 0.5mm Thin DFN package
50% smaller version of MAX823/MAX824/MAX825/
ADM823/ADM824/ADM825
8x lower watchdog input current than competition

Accurate voltage supervisor has wide temperature range

Micrel has introduced a +/-0.5% accuracy voltage supervisor, with manual reset input, watchdog timer and dual outputs in 1.6mm x 1.6mm thin DFN package.

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The MIC826 offers eight reset threshold options and is intended to monitor 1.8V to 5V power supplies.

The device features a +/-0.5% voltage threshold accuracy at room temperature and +/-1.5% voltage threshold accuracy over the -40 deg C to +125 deg C temperature range.

The chip consumes a low 3.8µA of supply current for power supplies; lower than 3.6V and 4.8µA for solutions operating from a 5V power supply.

The IC also features an industry standard reset timeout period of 140ms (min) and a watchdog time output period of 1.6s, as well as dual, active-high push-pull, and active-low push-pull reset outputs.

 

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