MCP9501/2/3/4
Temperature Switch with Selectable Hysteresis
Description
Features
• Factory Set Temperature Switch
Microchip Technology’s MCP9501/2/3/4 family 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.
• Available Temperature Switch Thresholds:
- T
= -35°C, -25°C, -15°C, -5°C, +5°C,
SET
+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)
In addition, this family of devices provides
user-selectable +2°C and +10°C (typical) switch hyster-
esis, and various output configurations. The MCP9501/2
outputs switch for rising temperatures, while the
MCP9503/4 devices switch for falling temperatures, with
the relative hysteresis at the set thresholds. This family
of devices is also available with an active-high, push-pull
output (MCP9502/4) and an active-low, open-drain
output (MCP9501/3). 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.
• Qualification: AEC-Q100 Rev. G, Grade 1
(-40°C to +125°C)
• Temperature Switch Accuracy:
- ±1°C (typical)
- ±4°C (maximum) between -15°C to +75°C
- ±6°C (maximum) between -40°C to +125°C
• Switch Threshold Options (Hot/Cold):
- Rising temperature: MCP9501/2 (Hot option)
-
Falling temperature: MCP9503/4 (Cold option)
• Output Configuration Options:
The MCP9501/2/3/4 devices operate from a 2.7V to 5.5V
supply. This family is available with the space-saving
5-lead SOT-23 package.
- Active-low, open-drain output: MCP9501/3
- Uses external pull-up resistor
- Active-high, push-pull output: MCP9502/4
Package Types
• User-Selectable Hysteresis: +2°C or +10°C
(typical)
MCP9501/2/3/4
5-Lead SOT-23
• 5-Lead SOT-23 Package
Applications
• Power Supply Critical Temperature Shutdown
• Temperature Alarm
• Thermostat Control
• Fan Control
GND
1
5 Output
GND 2
V
4
3
HYST
DD
• Base Stations
• Automotive
Typical Performance
40%
TA = -35°C to +125°C
VDD = 4.1V
32 Units
35%
30%
25%
20%
15%
10%
5%
0%
-4.0 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0 4.0
Temperature Accuracy (°C)
2011-2016 Microchip Technology Inc.
DS20002268B-page 1