MITSUMI
Open collector output temperature switch MM1523 N/MM1524 N
Open collector output temperature switch
Monolithic IC MM1523 N/MM1524 N
Outline
This IC is a temperature switch that emits a logic signal when chip temperature during load reaches the set
detection temperature. It is composed of a temperature detection circuit and a comparator.
Features
1. Detection temperature precision
3C max.
2. Detection temperature hysteresis
10C typ.
3. Detection temperature is lined up in 10C steps by trimming in the +50C ~ +100C range.
4. Active low output/MM1523 N
5. Active high output/MM1524 N
6. Consumption current
90A (when OFF/typ.)
7. Operating power voltage range
+2.7~+10.0V
8. Operating temperature range
-40~+125C
Package
SOT-25A
Applications
1. CPU heat protection
2. Battery charger heat protection
3. Cellular phones
Pin Description
Pin No.
Pin Name
Function
1,3
N.C
2
GND
GND PIN
4
V
CC
V
CC
PIN
5
V
OUT
Output PIN
Absolute Maximum Ratings
(Ta=25C)
Item
Symbol
Rating
Unit
Storage temperature
T
STG
-55~+150
C
Operating temperature
T
OPR
-40~+125
C
Supply Voltage
V
CC
max.
+13
V
Output current
I
OUT
max.
10
mA
Allowable loss
Pd
188
mW
MITSUMI
Open collector output temperature switch MM1523 N/MM1524 N
Electrical Characteristics
(Except where noted otherwise, V
CC
=3V, Ta=-40~+125C, I
OUT
=0A)
Item
Symbol
Measuring Circuit
Min. Typ. Max. Unit
47
50
53
C
57
60
63
C
Temperature threshold
*
1
T
TH
67
70
73
C
77
80
83
C
87
90
93
C
97
100
103
C
Current consumption
when turning it off
I
CCOFF
V
CC
=2.7~10V
90
150
A
Current consumption
when turning it on
I
CCON
V
CC
=2.7~10V
160
230
A
Temperature threshold
hysteresis
*
2
T
HYST
10
C
Output leakage current
when turning it off
I
OFF
Vcc=2.7~10V Ta=25C
0.1
A
Low-level output voltage
V
LO
I
OUT
=1mA
0.1
0.4
V
Note:
*
1 Temperature threshold
Note:
*
2 Temperature threshold hysteresis: T
HYST
Model Name
Temperature Threshold
MM1523AN
MM1524AN
50C
MM1523BN
MM1524BN
60C
MM1523CN
MM1524CN
70C
MM1523DN
MM1524DN
80C
MM1523EN
MM1524EN
90C
MM1523FN
MM1524FN
100C
Temperature threshold: T
TH
Temperature
T
HYST=
10C
T
TH
-T
HYST
MM1523 N Output
MM1524 N Output
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