The MIC2785 is a micropower voltage monitor that provides undervoltage monitoring and manual reset capability in a tiny 1.2mm x 1.2mm QFN package.The MIC2785 provides a monitored voltage input (VIN) separate from the supply input (VDD). This ensures that the reset (/RST) output maintains a valid output state when the voltage being monitored ramps up or down.The device also includes a manual reset input (/MR). The /RST output is an active low push-pull output.

The undervoltage detector compares the VIN pin voltage against the factory-programmed threshold of 1.62V. The reset output is asserted any time the input voltage drops below the programmed threshold voltage. A reset can be generated at any time by asserting the manual reset input, /MR. This reset output will remain active until the release of /MR. The /MR input can also be used to daisy-chain the MIC2785 onto existing power monitoring circuitry or other supervisors. Hysteresis is included to prevent chattering due to noise.

The MIC2785 consumes a minimum of quiescent current, only 5μA, 1.5μA from the main supply pin and 3.5μA from the input pin. Offered in a tiny space saving 6-pin QFN 1.2mm x 1.2mm package.

   No external components

   Monitors input voltage for undervoltage condition

  Separate inputs for supply (VDD) and monitor (VIN)

   ±1.5% VIN threshold voltage accuracy

   Valid /RST state with VIN down to 0.0V

   Valid /RST state with VDD down to 1.20V

   Factory-programmed 1.62V reference

   Manual reset input (/MR)

   Active low RESET (/RST) output

   Ultra-low input current - 5μA total (VIN and VDD)

   Rejects brief input transients

   -40°C to 85°C operating temperature range

   RoHS lead-free compliant

   Available in tiny 6-pin 1.2mm x 1.2mm Thin QFN package