MIC2755 - Micrel Semiconductor

MIC2755 Battery System Supervisor Preliminary Information

The MIC2755 is composed of multiple comparators, a reset pulse generator, and logic. It is designed for monitoring the battery supply of portable digital systems, including PDAs and pagers. The MIC2755 detects three different battery states: battery OK, low battery, and dead battery. The reset (/RST) output is asserted for at least 700ms when a fresh battery.

Features

• Optimized for PDAs, pagers and other hand-held devices.
• Detects multiple battery states: - battery OK - low battery - dead battery
• Adjustable voltage thresholds
• High accuracy ± 2% voltage thresholds
• Reset generation at power-on (700ms min.)
• Debounced manual reset function
• Internal logic prevents chatter if battery voltage fluctuates
• Extremely low 2µA typical supply current
• I/Os can be pulled above VDD (7V absolute maximum)
• Immune to brief power supply transients
• Low cost
• 8-lead MSOP Applications
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• PDAs Pagers Consumer electronics Embedded controllers Portable.