Reset chip draws 1 micro-amp

November 14, 2017 | 00:00
Image: Diodes Inc.
Image: Diodes Inc.
Designed to support the supervisory circuits of microprocessors, the APX803L micro-power voltage detector from Diodes offers a detection between 1.2 and 5.0 V in 0.1-V steps, while consuming a trifling 1 μA (typical; 2.5 μA max.).


Threshold accuracy is ±1.5%, and no external components are required.

Whenever the monitored power supply rail drops below the chosen threshold, the APX803L asserts a reset signal within 20 μs that is held until the supply rail recovers to a level above the threshold.

The device’s Reset pin provides an open-drain, active-low output with device ordering options that allow for delay times of 0 ms, 55 ms, 220 ms, or 450 ms.
It is available in 3-pin SOT23, SOT323, or SC59, or a 5-pin SOT25.

The APX803S is similar, but draws 10 μA. The L and S variants replace the earlier APX803 and APS803/D.

According to Diodes, the APX803L is intended for computers and communications equipment, but in particularly portable battery-powered devices. The APX803L’s low quiescent current also makes it attractive when appliances like televisions are operating in stand-by mode.
 
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