MIC2777

• Monitors two independent power supplies for undervoltage conditions
• One fixed and one user adjustable input
• 1.5% theshold accuracy
• Choice of factory-programmed thresholds
• User-adjustable input can monitor supplies as low as 0.3V
• Generates 140ms (minimum) power-on RESET pulse
• Manual reset capability
• Both active-high and active-low RESET outputs
• Input may be pulled above V_DD (abs. max.)
• /RST output valid down to 1.2V
• Ultra-low supply current, 3.5A typical
• Rejects brief input transients
• IttyBitty™ 5-lead SOT-23 package

Supply Voltage (V_DD) ............................... 0.3V to +7V
Input Voltage (V_IN) .................................. 0.3V to +7V
RST, (/RST) Current ................................................20mA
Storage Temperature (T_S) .............. 65°C to +150°C
ESD Rating, Note 3 ............................................... 1.5kV
Note 3. Devices are ESD sensitive. Handling precautions recommended. Human body model, 1.5k in series with 100pF

The MIC2777 is a dual power supply supervisor that provides under-voltage monitoring, manual reset capability, and poweron reset generation in a compact 5-pin SOT package. MIC2777 features include two under-voltage detectors, one fixed and one adjustable, and both active-high and active-low reset outputs.One under-voltage detector compares VDD against a fixed threshold. Ten factory-programmed thresholds are available.The other under-voltage detector is user-adjustable.

The reset outputs of MIC2777 are asserted for no less than 140ms at power-on and any time VDD or the input voltage drops below the corresponding reference voltage. They remain asserted for the timeout period after the input voltage and VDD subsequently rise back above the threshold boundaries. A reset of MIC2777 can be generated at any time by pulling down on the adjustable input. Hysteresis is included to prevent chattering due to noise. Typical supply current is a low 3.5A.