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PDF MCP9502 Data sheet ( Hoja de datos )
| Número de pieza | MCP9502 | |
| Descripción | Temperature Switch | |
| Fabricantes | Microchip | |
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MCP9501/2/3/4
Temperature Switch with Selectable Hysteresis
Features
• Factory Set Temperature Switch
• Available Temperature Switch Thresholds:
- TSET = -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)
• 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:
- 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
Applications
• Power Supply Critical Temperature Shutdown
• Temperature Alarm
• Thermostat Control
• Fan Control
• Base Stations
• Automotive
Typical Performance
40%
35%
30%
TA = -35°C to +125°C
VDD = 4.1V
32 Units
25%
20%
15%
10%
5%
0%
-4.0 -3.0 -2.0 -1.0 0.0 1.0 2.0 3.0
Temperature Accuracy (°C)
4.0
Description
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.
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.
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.
Package Types
MCP9501/2/3/4
5-Lead SOT-23
GND 1
GND 2
HYST 3
5 Output
4 VDD
2011-2016 Microchip Technology Inc.
DS20002268B-page 1
1 page  
MCP9501/2/3/4
2.0 TYPICAL PERFORMANCE CURVES
Note:
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, VDD = 2.7V to 5.5V, TA = -40°C to +125°C, GND = Ground, RPULL-UP = 10 k
(MCP9501/3 only) and 0.1 µF bypass capacitor.
6.0
4.0
Spec. Limits
2.0
0.0
-2.0
-4.0
-6.0
-40 -20 0
+ St. Dev.
Average
- St. Dev.
VDD = 4.1V
32 units
20 40 60
TA (°C)
80 100 120
FIGURE 2-1:
Temperature Accuracy.
0.10
0.08
0.06
HYST Input Pin
0.04
0.02
Open-Drain Output
(MCP9501/3 only)
0.00
-40 -20 0 20 40 60 80 100 120
TA (°C)
FIGURE 2-4:
Leakage vs. Temperature.
4.0 14.0
3.5 13.0
3.0
HYST = VSS
2.5
12.0
11.0
2.0 10.0
1.5 9.0
1.0
HYST = VDD
8.0
0.5 7.0
0.0 6.0
-40 -20 0 20 40 60 80 100 120
TA (°C)
FIGURE 2-2:
Hysteresis vs. Temperature.
40
35
30 VDD = 5.5V
VDD = 4.1V
25 VDD = 2.7V
20
15
10
-40 -20
0
20 40 60
TA (°C)
80 100 120
FIGURE 2-3:
Temperature.
Supply Current vs.
20%
100%
15%
10%
VOH, VDD = 5.5V
VOH, VDD = 4.1V
VOH, VDD = 2.7V
5%
95%
VOL, VDD = 5.5V
VOL, VDD = 4.1V
VOL, VDD = 2.7V
90%
85%
0% 80%
-40 -20 0 20 40 60 80 100 120
TA (°C)
FIGURE 2-5:
VOL,VOH vs. Temperature.
3.0
2.5 VPOR
-15
-25
2.0 -35
1.5 -45
1.0 -55
0.5
0.0
-40 -20 0
Hysteresis
20 40 60
TA (°C)
-65
-75
80 100 120
FIGURE 2-6:
Power-on Reset Threshold
vs. Temperature.
2011-2016 Microchip Technology Inc.
DS20002268B-page 5
5 Page 
4.1.2 POWER SUPPLY REJECTION
The MCP9501/2/3/4 family does not require any
additional components. However, it is recommended
that a decoupling capacitor of 0.1 µF to 1 µF be used
between the VDD and GND pins. A high-frequency
ceramic capacitor is recommended. It is necessary for
the capacitor to be located as close as possible to the
power pins in order to provide effective noise
protection.
Switching
Regulator
200
0.1 µF
Bypass
MCP9501/2/3/4
VDD
Switching
Regulator
Linear
Regulator
200
0.1 µF
Bypass
MCP9501/2/3/4
VDD
FIGURE 4-5:
Single Resistor.
Power Supply Filter Using a
For applications where a switching regulator is used to
power the sensor, it is recommended to add a 200
resistor in series to VDD to filter out the switcher noise.
It is also recommended to add the series resistor in
applications where a linear regulator is used to
step-down a switching regulator voltage to power the
sensor, as shown in Figure 4-5. For example, if a
linearly regulated 3.3V from a 5V switching regulator is
used to power the sensor, add a 200 series resistor.
MCP9501/2/3/4
The MCP9501/2/3/4 family of sensors is designed to
prevent false output triggers due to high-frequency
power supply or system noise. Figure 4-6 shows the
device performance with a high-frequency signal
added on VDD. The output is not triggered due to the
signal added on VDD. With some applications, it is
recommended to add a bypass capacitor of 0.1 µF to
1 µF.
6
5
4 No False Trigger
3
2 VDD = 5V + 400mVA
VDD = 5V + 400mVSQR
1
TSET = +25°C
TA = +23°C
0
110 0
100
100
1000
10000
1k 10k
100k100000
Frequency (Hz)
1M1000000
10M10000000
FIGURE 4-6:
(TSET = +25°C).
Power Supply Rejection
2011-2016 Microchip Technology Inc.
DS20002268B-page 11
11 Page | ||
| Páginas | Total 22 Páginas | |
| PDF Descargar | [ Datasheet MCP9502.PDF ] | |
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