MCP9501/2/3/4
Temperature Switch with Selectable Hysteresis
Features
• Factory Set Temperature Switch
• Available Temperature Switch Thresholds:
- T
SET
= -35°C,-25°C, -15°C, -5°C, 5°C, 15°C,
25°C, 35°C, 45°C, 55°C, 65°C, 75°C, 85°C,
95°C, 105°C, 115°C, 125°C
• Wide Operating Voltage Range: 2.7V to 5.5V
• Low Supply Current: 25 µA (typical)
• Temperature Switch Accuracy:
- ±1°C (typical)
- ±4°C (maximum) -15°C to +75°C
- ±6°C (maximum) -40°C to +125°C
• Switch Threshold Options (Hot/Cold):
- Rising Temp.: MCP9501/2 (Hot Option)
- Falling Temp.: MCP9503/4 (Cold Option)
• Output Configuration Options:
- Active Low, Open-Drain Output: MCP9501/3
– Uses External Pull-up Resistor
- Active-High, Push-Pull Output: MCP9502/4
• User Selectable Hysteresis: 2°C or 10°C (typical)
• 5-lead SOT-23 package
Description
Microchip Technology’s MCP9501/2/3/4 family of
devices are temperature switches with ±1°C (typical)
accurate factory set output thresholds. These devices
are ideal for high power supply systems where an
overtemperature protection circuit is needed. These
devices do not require external components, consume
25 µA (typical), and the factory set thresholds provide
simplicity.
In addition, this family of devices provide user
selectable 2°C and 10°C (typical) switch hysteresis,
and various output configurations. The MCP9501/2
outputs switch for rising temperatures while the
MCP9503/4 switch for falling temperature, with the
relative hysteresis at the set thresholds. This family of
devices is also available with Active-High Push-Pull
and Active-Low Open-Drain outputs, the MCP9502/4
and the MCP9501/3, respectively. The Push-Pull
output is ideal for a microcontroller interface while the
Open-Drain output can be used for level shifting, wired-
OR configuration, or as a heater on/off switch.
The MCP9501/2/3/4 operate from 2.7V to 5.5V supply.
This family is available with space saving 5-lead
SOT-23 package.
Applications
•
•
•
•
•
•
Power Supply Critical Temperature Shutdown
Temperature Alarm
Thermostat Control
Fan Control
Base-Stations
Automotive
Package Types
MCP9501/2/3/4
SOT-23-5
GND 1
GND 2
Hyst 3
4 V
DD
5 Output
Typical Performance
50%
40%
Occurrences
30%
20%
10%
0%
-4.0
-2.0
0.0
2.0
Temperature Accuracy (°C)
4.0
T
A
= -35°C to 125°C
V
DD
= 4.1V
32 Units
©
2011 Microchip Technology Inc.
DS22268A-page 1
MCP9501/2/3/4
OUTPUT FUNCTIONAL DESCRIPTION
MCP9501, Hot-Option (Open-Drain, Active-Low)
V
Output
Hysteresis
Note:
Available temperature thresholds for
Option P or for rising temperature
only: +5°C, +15°C, +25°C, +35°C,
+45°C, +55°C, +65°C, +75°C, +85°C,
+95°C, +105°C, +115°C, +125°.
Temperature
COLD
T
HYST
T
SET
HOT
MCP9502, Hot-Option (Push-Pull, Active-High)
V
Output
Hysteresis
Note:
Available temperature thresholds for
Option P or for rising temperature
only: +5°C, +15°C, +25°C, +35°C,
+45°C, +55°C, +65°C, +75°C, +85°C,
+95°C, +105°C, +115°C, +125°.
Temperature
COLD
T
HYST
T
SET
HOT
MCP9503, Cold-Option (Open-Drain, Active-Low)
V
Output
Hysteresis
Note:
Available temperature thresholds for
Option P or for rising temperature only:
+5°C, +15°C, +25°C.
Available temperature thresholds for
Option N or for falling temperature only:
-35°C, -25°C, -15°C, -5°C.
Note:
COLD
T
SET
T
HYST
Temperature
HOT
MCP9504, Cold-Option (Push-Pull, Active-High)
V
Output
Hysteresis
Note:
Available temperature thresholds for
Option P or for rising temperature
only: +5°C, +15°C, +25°C.
Available temperature thresholds for
Option N or for falling temperature
only: -35°C, -25°C, -15°C, -5°C.
Contact Microchip for all other
threshold options.
Note:
Note:
Temperature
COLD
T
SET
T
HYST
HOT
DS22268A-page 2
©
2011 Microchip Technology Inc.
MCP9501/2/3/4
1.0
ELECTRICAL
CHARACTERISTICS
Junction Temperature (T
J
) .......................................... +150°C
ESD protection on all pins (HBM:MM) ................. (4 kV/400V)
Latch-Up Current at each pin (25°C) ....................... ±200 mA
Absolute Maximum Ratings †
V
DD
.................................................................................. 6.0V
Voltage at all Input/Output pins ............... GND – 0.3V to 6.0V
Input/Output Current .....................................................20 mA
Storage temperature .....................................-65°C to +150°C
Ambient temp. with power applied ................-40°C to +125°C
†Notice:
Stresses above those listed under “Maximum
ratings” may cause permanent damage to the device. This is
a stress rating only and functional operation of the device at
those or any other conditions above those indicated in the
operational listings of this specification is not implied.
Exposure to maximum rating conditions for extended periods
may affect device reliability.
DC CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated,
V
DD
= 2.7V to 5.5V, T
A
= -40°C to +125°C, and
GND = Ground.
Parameters
Sensor Accuracy
-15°C
≤
T
A
≤
+75°C
-40°C
≤
T
A
≤
+125°C
Power Supply
Operating Voltage
Operating Current
Line-Regulation
Hysteresis
Trip Point Hysteresis
Hysteresis Select Input
T
HYST
V
IH
V
IL
I
Leak
Open-Drain Output Leakage
Output Voltage High
Output Voltage Low
Turn On Time
SOT23-5
I
Leak
V
OH
V
OL
T
ON
t
RES
—
—
0.8V
DD
—
—
—
0.8V
DD
—
—
—
2
10
—
—
0.1
0.1
—
—
1
1.7
—
—
—
0.2V
DD
—
10
—
0.2V
DD
—
—
°C
°C
V
V
µA
µA
V
V
ms
s
Time to 63% (89°C).
+25°C (Air) to +125°C
(oil bath)
MCP9501/3
I
OUT
= 5 mA (MCP9502/4)
I
OUT
= 5 mA
HYST = GND
HYST = V
DD
V
DD
I
DD
Δ°C/ΔV
2.7
—
—
—
25
0.2
5.5
40
—
V
µA
°C/V V
DD
= 2.7V to 5.5V
-4
-6
±1
±2
+4
6
°C
°C
Note 1
Sym
Min
Typ
Max
Unit
Conditions
Note 1:
This specification is tested at mid supply of 4.1V for optimum operation across the supply voltage range of
2.7V to 5.5V.
TEMPERATURE CHARACTERISTICS
Electrical Specifications:
Unless otherwise indicated,
V
DD
= 2.7V to 5.5V, T
A
= -40°C to +125°C, and
GND = Ground.
Parameters
Temperature Ranges
Specified Temperature Range
Operating Temperature Range
Storage Temperature Range
Thermal Package Resistances
Thermal Resistance, 5L-SOT23
Note 1:
θ
JA
—
220.7
—
°C/Ω
Operation in this range must not cause T
J
to exceed Maximum Junction Temperature (+150°C).
T
A
T
A
T
A
-40
-40
-65
—
—
—
+125
+125
+150
°C
°C
°C
(Note
1)
Sym
Min
Typ
Max
Units
Conditions
©
2011 Microchip Technology Inc.
DS22268A-page 3
MCP9501/2/3/4
2.0
Note:
TYPICAL PERFORMANCE CURVES
The graphs and tables provided following this note are a statistical summary based on a limited number of
samples and are provided for informational purposes only. The performance characteristics listed herein
are not tested or guaranteed. In some graphs or tables, the data presented may be outside the specified
operating range (e.g., outside specified power supply range) and therefore outside the warranted range.
Note:
Unless otherwise indicated, V
DD
= 2.7V to 5.5V, T
A
= -40°C to +125°C, GND = Ground, R
PULL-UP
= 10 kΩ
(MCP9501/3 only) and 0.1 µF bypass capacitor.
6.0
Temperature Accuracy (°C)
4.0
2.0
0.0
-2.0
-4.0
-6.0
-40
-20
0
20
40
T
A
(°C)
60
80
100
120
V
DD
= 4.1V
32 units
Spec. Limits
+ St. Dev.
Average
- St. Dev.
0.10
0.08
Leakage (µA)
0.06
0.04
0.02
0.00
-40
HYST Input Pin
Open-Drain Output
(MCP9501/03 only)
-20
0
20
40
T
A
(°C)
60
80
100
120
FIGURE 2-1:
Temperature Accuracy.
FIGURE 2-4:
20%
Leakage vs. Temperature.
100%
HYST = V
SS
, Hysteresis (°C)
4.0
3.5
3.0
2.5
2.0
1.5
1.0
0.5
0.0
-40 -20
0
20
40
60
80 100 120
T
A
(°C)
HYST = V
DD
HYST = V
SS
14.0
HYST = V
DD
, Hysteresis (°C)
13.0
12.0
11.0
10.0
9.0
8.0
7.0
6.0
15%
V
OL
(% of V
DD
)
V
OH
, V
DD
= 5.5V
V
OH
, V
DD
= 4.1V
V
OH
, V
DD
= 2.7V
V
OL
, V
DD
= 5.5V
V
OL
, V
DD
= 4.1V
V
OL
, V
DD
= 2.7V
95%
V
OH
(% of V
DD
)
10%
90%
5%
85%
0%
-40 -20
0
20
40
60 80 100 120
T
A
(°C)
80%
FIGURE 2-5:
3.0
V
OL
,
V
OH
vs. Temperature.
105
V
POR
FIGURE 2-2:
40
Hysteresis vs. Temperature.
V
2.5
) 2.0
V
(
R
O
1.5
P
V
1.0
0.5
0.0
-40 -20
-40
-20
0
20
40
T
A
(°C)
60
80
100
120
95
85
75
30
I
DD
(µA)
25
20
15
10
V
DD
= 5.5V
V
DD
= 4.1V
V
DD
= 2.7V
V
POR
(V)
35
Hysteresis
65
55
45
0
20
40 60
T
A
(°C)
80
100 120
FIGURE 2-3:
Temperature.
Supply Current vs.
FIGURE 2-6:
vs. Temperature.
Power On Reset Threshold
DS22268A-page 4
©
2011 Microchip Technology Inc.
V
POR
Hysteresis (mV)
P
O
R
V
POR
Hysteresis (mV)
H
y
s
t
e
r
e
s
i
s
(
m
V
)
MCP9501/2/3/4
Note:
Unless otherwise indicated, V
DD
= 2.7V to 5.5V, T
A
= -40°C to +125°C, GND = Ground, R
PULL-UP
= 10 kΩ
(MCP9501 only) and 0.1 µF bypass capacitor.
60%
50%
s 40%
e
c
n
e 30%
r
r
u
c
c 20%
O
10%
0%
0
.
4
-
0
0
0
.
.
.
2
0
2
-
Temperature
(°C)
T
A
Accuracy (°C)
0.0
2.0
-2.0
Occurrences
T
A
= -15\ C
°
V
DD
= 4.1V
492 Units
60%
50%
s 40%
e
c
n
e 30%
r
r
u
c
c 20%
O
10%
0%
-4.0
Occurrences
Occurrences
T
A
= 105\ C
°
V
DD
= 4.1V
480 Units
-2.0
0.0
2.0
0
.
4
0
.
4
-
0
0
0
.
.
.
2
0
2
-
Temperature (°C)
T
A
(°C)
T
A
(°C)
T
A
Accuracy (°C)
FIGURE 2-7:
Temperature Accuracy
Distribution at -15°C.
60%
50%
s 40%
e
c
n
e 30%
r
r
u
c
c 20%
O
10%
0%
0.0
2.0
4.0
-4.0
-2.0
0
.
4
-
0
0
0
.
.
.
2
0
2
-
T
A
(°C)
Temperature Accuracy (°C)
0
.
4
Occurrences
T
A
= 5\ C
°
V
DD
= 4.1V
480 Units
-4.0
4.0
FIGURE 2-10:
Temperature Accuracy
Distribution at 105°C.
60%
50%
s 40%
e
c
n
e 30%
r
r
u
c
c 20%
O
10%
0%
0.0
2.0
-4.0
-2.0
4.0
4.0
Occurrences
°
T
A
= 115\ C
V
DD
= 4.1V
480 Units
0
.
4
-
0
0
0
.
.
.
2
0
2
-
T
A
(°C)
Temperature Accuracy (°C)
FIGURE 2-8:
Temperature Accuracy
Distribution at 5°C.
60%
50%
s 40%
e
c
n
e 30%
r
r
u
c
c 20%
O
10%
0%
-4.0
-2.0
0.0
2.0
Occurrences
FIGURE 2-11:
Temperature Accuracy
Distribution at 115°C.
60%
50%
Occurrences
°
T
A
= 65\ C
V
DD
= 4.1V
480 Units
T
A
= 125\ C
°
V
DD
= 4.1V
480 Units
s 40%
e
c
n
e 30%
r
r
u
c
c 20%
O
10%
0
.
4
-
0
0
0
.
.
.
2
0
2
-
T
A
(°C)
Temperature Accuracy (°C)
4.0
-4.0
-2.0
0
.
4
0%
0.0
0
.
4
-
0
0
0
.
.
.
2
0
2
-
Temperature Accuracy (°C)
T
A
(°C)
2.0
FIGURE 2-9:
Temperature Accuracy
Distribution at 65°C.
FIGURE 2-12:
Temperature Accuracy
Distribution at 125°C.
©
2011 Microchip Technology Inc.
DS22268A-page 5
4.0
0
.
4
0
.
4
0
.
4
Embedded System
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