The MIC2775 is a power supply supervisor that provides undervoltage monitoring, manual reset capability, and power-on reset generation in a compact 5-pin SOT package. Features include an undervoltage detector, a delay generator, a manual reset input, and both active-high and active-low reset outputs. The undervoltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available.
The reset outputs are asserted for no less than 140ms at power-on and any time the input voltage drops below the reference voltage. It remains asserted for the timeout period after the input voltage subsequently rises back above the threshold boundary. A reset can be generated at any time by asserting the manual reset input, /MR. This reset output will remain active at least 140ms after the release of /MR. The /MR input can also be used to daisy-chain the MIC2775 onto existing power monitoring circuitry or other supervisors. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5µA.
Additional Features
Monitors power supply for undervoltage conditions
Choice of factory-programmed thresholds
Generates 140ms (minimum) power-on RESET pulse
Manual reset capability
Both active-high and active-low RESET outputs
/RST output valid down to 1.2V
Ultra-low supply current, 3.5µA typical
Rejects brief input transients
No external components
For extended temperature range, see Micrel's MAX825
IttyBitty® 5-pin SOT-23 package
The MIC2775 is a power supply supervisor that provides undervoltage monitoring, manual reset capability, and power-on reset generation in a compact 5-pin SOT package. Features include an undervoltage detector, a delay generator, a manual reset input, and both active-high and active-low reset outputs. The undervoltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available.
The reset outputs are asserted for no less than 140ms at power-on and any time the input voltage drops below the reference voltage. It remains asserted for the timeout period after the input voltage subsequently rises back above the threshold boundary. A reset can be generated at any time by asserting the manual reset input, /MR. This reset output will remain active at least 140ms after the release of /MR. The /MR input can also be used to daisy-chain the MIC2775 onto existing power monitoring circuitry or other supervisors. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5µA.
Additional Features
- Monitors power supply for undervoltage conditions
- Choice of factory-programmed thresholds
- Generates 140ms (minimum) power-on RESET pulse
- Manual reset capability
- Both active-high and active-low RESET outputs
- /RST output valid down to 1.2V
- Ultra-low supply current, 3.5µA typical
- Rejects brief input transients
- No external components
- For extended temperature range, see Micrel's MAX825
- IttyBitty® 5-pin SOT-23 package
