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MM1305

Remaining Battery Power Display

Mitsumi 

MITSUMI

Remaining Battery Power Display MM1305

Remaining Battery Power Display

Monolithic IC MM1305

Outline

This IC detects battery voltage and displays the power remaining in the battery. Portable equipment is

becoming more and more popular, and one standard function of this type of equipment is remaining battery

power display. This IC has four threshold voltages built in. Since their respective detection circuits share the

reference voltage on one chip, the detection voltage for each lags in the same direction. Thus, there is much

smaller error as compared to the reciprocal error resulting from combining single circuits.

Also, the stepped display of remaining battery power as in nickel cadmium, nickel hydrogen and lithium ion

batteries is enabled through super high precision voltage detection of ±1%.

Features

1. A separate line-up of detection voltages for alkaline magnesium and nickel cadmium and nickel hydrogen

batteries.

Alkaline magnesium : 1.350V /1.285V /1.200V /1.100V

Nickel cadmium, nickel hydrogen : 1.275V /1.245V /1.205V /1.100V

2. Super high precision detection voltage : ±1% typ.

3. Low current consumption : Waiting : 1.5µA

Detection : 12µA

4. Ripple absorption pin

Enables continuous ripple absorption and suppresses detection errors.

5. Built-in hysteresis voltage

Package

VSOP-8A (MM1305XW, MM1305AW, MM1305BW)

Absolute Maximum Ratings

Item

Specification

Unit

Storage temperature

-40~+125

°C

Operating temperature

-20~+70

°C

Input voltage

5

V

Output pin voltage

5

V

Allowable loss

300

mW

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