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MIC2755

Battery Operated Supervisor

Status: In Production

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-pin MSOP
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Overview
Documents
Development Environment
RoHS Information
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Device Overview

Summary

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 is inserted. The nonmaskable interrupt output (/NMI) is asserted when the battery voltage is below the NTH threshold, indicating that high-power system operations should not occur. If and when battery voltage falls below the power-off threshold (PTH), the reset output is asserted and latched, inhibiting system operation until the battery is replaced or recharged.

All three voltage thresholds are set using external resistors. A manual reset function can be implemented by connecting a switch directly to the power on reset/manual reset [RTH(/MR)] input. Internal circuitry detects switch activation and generates a minimum 175ms debounced reset signal. The MIC2755's power supply input is separate from the detector inputs to allow it to be powered from a down-stream voltage, such as the output of a boost converter.

Inputs and outputs can be pulled above VDD (up to 7V absolute maximum) without adverse effects or excessive current draw.

Supply current is typically a low 2µA. Hysteresis is included on all voltage detectors to prevent chattering due to noise. The MIC2755 is available in the tiny 8-pin micro-small-outline package (MSOP).

Additional 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-pin MSOP
Parametrics
Name
Value
Product Type
Supervisor
Manual Reset
Yes
Operating Temp. Range (°C)
-40 to 85
Vcc Range (V)
1.5 - 5.5
Nominal Reset Voltage (V)
1.24
Reset Type
Active Low
Output
Open-Drain
Typical Reset Pulse Width (ms)
700
Typical Supply Current (µA)
2

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Data Sheets


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RoHS Information

Part Number
Device Weight (g)
Shipping Weight (grams)
Lead Count
Package Type
Package Width
Solder Composition
JEDEC Indicator
RoHS
China EFUP
MIC2755YMM
0.025100
0.124600
8
MSOP
3x3mm
NiPdAu
e4
To see a complete listing of RoHS data for this device, please Click here
Shipping Weight = Device Weight + Packing Material weight. Please contact sales office if device weight is not available.

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