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 : 1.5A
Detection : 12A
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
MITSUMI
Remaining Battery Power Display MM1305
Electrical Characteristics
(Unless otherwise specified Ta=25C, V
CC
=1.5V)
Item
Measurement Conditions
Min.
Typ.
Max.
Unit
Current consumption
12.0
18.0
A
Current consumption during waiting
V
CC
=1.3V, CE pin=L
1.5
2.5
A
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
TH
1=V
TH
1-V
TH
4
230
250
270
2
Rank A
V
TH
2=V
TH
2-V
TH
4
160
185
200
mV
3
V
TH
3=V
TH
3-V
TH
4
85
100
115
1
V
TH
1=V
TH
1-V
TH
2
20
30
40
2
Rank X
V
TH
2=V
TH
2-V
TH
3
30
40
50
mV
3
V
TH
3=V
TH
2-V
TH
4
135
145
155
Detection voltage temperature factor
200
ppm/C
Hysteresis voltage
10
20
35
mV
Output sink current
V
CC
=1.3V, Output saturation voltage=0.3V
40
A
Output saturation voltage 1
150
250
2
I
SINK
=30A
150
250
mV
3
150
250
4
150
250
Output leak voltage 1
1
2
V
CC
=1.0V, Output saturation voltage=1.5V
1
A
3
1
4
1
Power supply voltage operating limit
0.70
0.75
V
Input H voltage
V
CC
-0.3
V
CC
V
CC
+0.3
V
L current
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
k
C E p i n
MITSUMI
Remaining Battery Power Display MM1305
Block Diagram, Example of Application Circuit
Timing Chart
V
TH
1
V
TH
2
V
TH
3
V
TH
4
Hysteresis
Hysteresis
Hysteresis
Hysteresis
OUT1
OUT2
OUT3
OUT4
CE
GND
V
CC
V
CC
V
CC
V
CC
V
TH
1 T
H
2 T
H
3 T
H
4
OUT 1
L
H
H
H
H
OUT 2
L
L
H
H
H
OUT 3
L
L
L
H
H
OUT 4
L
L
L
L
H
H
Operation
L
Waiting
Output
CE pin
Note : Please connect the CE pin to Vcc
when not using.
PDF 
ZIP