MITSMI MM1252BF, MM1253AF, MM1251BF, MM1252AF, MM1251AF Datasheet

MITSUMI

Remaining Battery Power Display MM1251, MM1252, MM1253

Remaining Battery Power Display

Monolithic IC MM1251, MM1252, MM1253

This IC detects battery voltage and displays the power remaining in the battery. Display of the battery's
remaining power is an indispensable function for portable equipment. The use of this IC makes this display
easily achievable.
The usual method of display of remaining battery power, as in the MM1206, is three marks lighting up in
sequence on an LED or other display. This IC, however, uses only one light to display the remaining battery
power, resulting in lower cost.

Outline

Features

1. Adjustable flashing speed

2. Adjustable detection voltage supports all settings

3. Adjustable hysteresis voltage enables response to large ripple settings

4. High precision voltage detection (MM1253) enables support of sets using nickel cadmium and other
batteries

5. The LED can be lit up by the voltage from one battery (type of special built-in step-up circuit : rank B)

Package

SOP-8D (MM1251AF, MM1251BF, MM1252AF, MM1252BF, MM1253AF)

Series Description

Display Pattern

Normal Low Power

Detection Precision

MM1251 Light Off Flashing ±30mV

MM1252 Light On Flashing ±30mV

MM1253 Light Off Flashing ±9mV

Absolute Maximum Ratings

(Ta=25°C)

Item Rating Unit

Storage temperature

-

40~+125 °C

Operating temperature

-

20~+70 °C

Input voltage

-

0.3~+3 V

Output Terminal Applied Voltage

-

0.3~+7 V

Allowable loss 300 mW

MITSUMI

Remaining Battery Power Display MM1251, MM1252, MM1253

Electrical Characteristics

(Unless otherwise specified Ta=25°C, Vc=1.5V, Vs=0.8V)
(Applicable to all models when the model name is left blank.)

Item Symbol

Measurement Conditions

Min. Typ. Max. Unit

V

S=1.0V

MM1251

25 40 µA

Current consumption 1 I

CC1

MM1253A

VCT=0.4V

MM1252A

0.15 0.25 mA

MM1252B

0.75 0.1 mA

MM1251A

0.15 0.25 mA

Current consumption 2 I

CC2VS=0.8V, VCT=0.4V

MM1253A

MM1251B

25 40 µA

V

S=1V 0.5V

MM1251

0.82 0.85 0.88 V

Detection voltage VD

V

HYS

<
=

0.1V

MM1252

MM1253 0.841 0.85 0.859 V

Detection voltage temperature factor

V/ T ±200

PPM/°C

HYS pin saturation voltage 1 VHYS1IHYS=5µA 25 50 mV

HYS pin saturation voltage 2 V

HYS2IHYS=25µA 50 100 mV

C

T pin charge current ICTS VCT=0.1V

-

60-40-20 nA

C

T pin discharge current ICTO VCT=0.4V 20 40 60 nA

C

T pin threshold value H VCTH VCT=0.1 0.4, VO

<
=

0.1V 0.2 0.3 0.4 V

C

T pin threshold value L VCTL VCT=0.4 0.1, VO

>
=

0.1V 0.1 0.2 0.3 V

Output sink current I

OUT VCR=0.4V 5 10 mA

Output saturation voltage I

OUTLVCT=0.4, IOUT=1mA 100 150 mA

Output leak current I

LE VS=1V, VOUT=5V 1 µA

Operating limit voltage V

OPR VS=0.8 VCCVOUT > 0.4V Rank A 0.65 0.75 V

V

S=0.8 VCC

Step-up operation limit voltage VOPL

VCC=0.1V 0.5V

Rank B 0.85 0.95 V

Voltage limit for maintaining

LED flashing