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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 5V
Output pin voltage 5V
Allowable loss 300 mW
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MITSUMI
Remaining Battery Power Display MM1305
Electrical Characteristics
(Unless otherwise specified Ta=25°C, VCC=1.5V)
Item Measurement Conditions Min. Typ. Max. Unit
Current consumption 12.0 8.0 µA
Current consumption during waiting V
CC=1.3V, CE pin=L 1.5 2.5 µA
Detection voltage 1 1.330 1.350 1.370
2
Rank A V
CC=H L
1.270 1.285 1.300
V
3 1.185 1.200 1.215
4 1.089 1.100 1.111
1 1.262 1.275 1.288
2
Rank X V
CC=H L
1.232 1.245 1.258
V
3 1.193 1.205 1.217
4 1.089 1.100 1.111
Detection voltage Difference 1 V
TH1=VTH1
-
VTH4 230 250 270
2 Rank A V
TH2=VTH2
-
VTH4 160 185 200 mV
3 V
TH3=VTH3
-
VTH4 85 100 115
1 V
TH1=VTH1
-
VTH2203040
2 Rank X V
TH2=VTH2
-
VTH3304050mV
3 V
TH3=VTH2
-
VTH4 135 145 155
Detection voltage temperature factor
±200
ppm/°C
Hysteresis voltage 10 20 35 mV
Output sink current
VCC=1.3V, Output saturation voltage=0.3V
40 µA
Output saturation voltage 1 150 250
2
I
SINK=30µA
150 250
mV
3 150 250
4 150 250
Output leak voltage 1 1
2
VCC=1.0V, Output saturation voltage=1.5V
1
µA
3 1
4 1
Power supply voltage operating limit
0.70 0.75 V
Input H voltage
VCC-
0.3
VCC
VCC-
0.3
V
L voltage CE pin=0V 100 300 500 nA
L voltage
-
0.3 0
-
0.3 V
Ripple absorption resistance
measure resistance between pins 8pin-6pin
70 100 130 kΩ
CEpin
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MITSUMI
Remaining Battery Power Display MM1305
Block Diagram, Example of Application Circuit
Timing Chart
VTH1
VTH2
V
TH3
V
TH4
Hysteresis
Hysteresis
Hysteresis
Hysteresis
OUT1
OUT2
OUT3
OUT4
CE
GND
V
CC
VCC
VCC
VCC VTH1 TH2 TH3 TH4
OUT 1 LHHHH
OUT 2 LLHHH
OUT 3 LLLHH
OUT 4 LLLLH
H Operation
L Waiting
Output
CE pin
Note : Please connect the CE pin to Vcc
when not using.
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