MAX6509-MAX6510 [MAXIM]
Resistor-Programmable SOT Temperature Switches; 电阻可编程SOT温度开关
| 型号： | MAX6509-MAX6510 |
| 厂家： | 
MAXIM INTEGRATED PRODUCTS |
| 描述： | Resistor-Programmable SOT Temperature Switches |
| 文件： | 总8页 (文件大小：142K) |
| 中文： | 中文翻译 | 下载： | 下载PDF数据表文档文件 |
19-1617; Rev 0; 1/00
Resistor-Programmable
SOT Temperature Switches
________________General Description
____________________________Features
The MAX6509/MAX6510 are fully integrated, resistor-
programmable temperature switches with thresholds
set by an external resistor. They require only one exter-
nal resistor to set the temperature threshold within a
wide -40°C to +125°C temperature range. The MAX6509
provides an open-drain output. The MAX6510 features
three selectable output options: active-low, active-high,
and open drain with an internal pull-up resistor.
ꢀ
0.5°C Threshold Accuracy
ꢀ
4.0°C (max) Threshold Accuracy (-40°C to +125°C)
ꢀ Temperature Threshold Set by a 1% External
Resistor
ꢀ Set-Hot or Set-Cold Option
ꢀ Low 32µA Supply Current
ꢀ Open-Drain, Push-Pull Outputs;
These switches operate with a +2.7V to +5.5V single
supply while providing a temperature threshold accura-
cy of 0.5°C ꢀtypꢁ or 4.0°C ꢀmaxꢁ. They typically con-
sume 32µA supply current. Hysteresis is pin selectable
to 2°C or 10°C.
Open-Drain with Internal Pull-Up Resistor
ꢀ Pin-Selectable 2°C or 10°C Hysteresis
ꢀ SOT23 Packages
The MAX6509/MAX6510 are available in 5-pin and 6-pin
SOT23 packages, respectively.
Ordering Information
________________________Applications
PIN-
TOP
µP Temperature Monitoring in High-Speed
Computers
PART
TEMP. RANGE
PACKAGE MARK
5 SOT23-5 ADNT
5 SOT23-5 ADNU
6 SOT23-6 AAHA
6 SOT23-6 AAHB
MAX6509HAUK-T
MAX6509CAUK-T
MAX6510HAUT-T*
MAX6510CAUT-T*
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
-40°C to +125°C
Temperature Control
Temperature Alarms
Fan Control
Automotive Applications
Note: A 2500 pc. minimum is required for SOT packages.
*See Table 1 for selectable output options.
Typical Operating Circuit
Pin Configurations
+2.7V TO +5.5V
TOP VIEW
0.1µF
V
CC
V
CC
V
SET
GND
OUT
1
2
3
5
4
CC
SET
GND
1
2
3
6
5
4
V
CC
MAX6509
MAX6510
SET
INT µP
OUT
MAX6509
MAX6510
(OUT)
OUTSET
HYST
R
SET
(OUTSET)
GND HYST
GND
GND
HYST
OUT, OUT
SOT23-5
SOT23-6
( ) ARE FOR MAX6510.
________________________________________________________________ Maxim Integrated Products
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.
For small orders, phone 1-800-835-8769.
Resistor-Programmable
SOT Temperature Switches
ABSOLUTE MAXIMUM RATINGS
Reference to GND Supply Voltage ꢀV ꢁ.................-0.3V to +6V
Continuous Power Dissipation ꢀT = +70°Cꢁ
A
CC
OUT ꢀMAX6509ꢁ ....................................................-0.3V to +6V
5-Pin SOT23 ꢀderate 7.1mW/°C above +70°Cꢁ.............571mW
6-Pin SOT23 ꢀderate 8.7mW/°C above +70°Cꢁ.............696mW
Operating Temperature Range .........................-40°C to +125°C
Junction Temperature......................................................+150°C
Storage Temperature Range.............................-65°C to +150°C
Lead Temperature ꢀsoldering, 10sꢁ .................................+300°C
OUT, OUT ꢀMAX6510ꢁ.............................-0.3V to ꢀV
SET, HYST, OUTSET ..................................-0.3V to ꢀV
+ 0.3Vꢁ
+ 0.3Vꢁ
CC
CC
Output Current ꢀall pinsꢁ .....................................................20mA
Input Current ꢀall pinsꢁ ........................................................20mA
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
ꢀV = +2.7V to +5.5V, T = T
to T
, unless otherwise noted. Typical values are at T = +25°C.ꢁ ꢀNote 1ꢁ
MAX A
CC
A
MIN
PARAMETER
SYMBOL
CONDITIONS
MIN
TYP
MAX
5.5
50
UNITS
Supply Voltage Range
V
CC
2.7
V
MAX6509
32
47
97
0.5
0.5
2
Supply Current
I
OUTSET = GND or V ꢀMAX6510ꢁ
CC
80
CC
165
4.0
3.0
OUTSET = unconnected ꢀMAX6510ꢁ, OUT = low
T
A
T
A
= 0°C to +125°C
= -40°C to 0°C
Temperature Threshold
Accuracy
∆T
TH
°C
HYST = GND
HYST = V
Temperature Threshold
Hysteresis
T
HYST
°C
µA
V
10
1
CC
HYST Input Leakage
V
IH
V
- 0.4
CC
HYST Input Threshold
V
IL
0.4
OUT Impedance to V
Output Voltage High
Output Voltage Low
OUTSET = unconnected ꢀMAX6510ꢁ
60
- 0.4
100
160
kΩ
V
CC
V
I = 5mA, OUTSET = GND or V ꢀMAX6510ꢁ V
CC
OUT
OH
CC
V
I
= 5mA
0.3
10
V
OL
OUT
Open-Drain Output Leakage
Current
I
V
OUT
= V ꢀMAX6509ꢁ
µA
OUT
CC
OUTSET, active low
0.2 · V
CC
OUTSET Voltage
V
I
MAX6510 OUTSET, active high
OUTSET, open drain
V
0.85 · V
0.42 · V
OUTSET
CC
0.55 ·V
CC
CC
V
V
= GND
-5.5
5.5
OUTSET
OUTSET
OUTSET Current
MAX6510
µA
= V
CC
OUTSET
OUTSET = unconnected
Note 1: 100% production tested at T = +25°C. Specifications over temperature limits are guaranteed by design.
+0.1
A
2
_______________________________________________________________________________________
Resistor-Programmable
SOT Temperature Switches
__________________________________________Typical Operating Characteristics
ꢀV
= +5V, R
= 10kΩ ꢀMAX6509 onlyꢁ, T = +25°C, unless otherwise noted.ꢁ
CC
PULL-UP
A
R
vs. TEMPERATURE
(T = -40°C TO 0°C)
A
SET
SUPPLY CURRENT vs. TEMPERATURE
50
45
40
35
30
25
20
15
10
160
V
= +5V
CC
150
140
130
120
110
100
90
V
= +3.3V
CC
V
= +2.7V
CC
R
= 0Ω
SET
OUTSET = GND (MAX6510)
-50 -25
0
25
50
75 100 125
-40 -35 -30 -25 -20 -15 -10 -5
0
TEMPERATURE (°C)
TEMPERATURE (°C)
R
vs. TEMPERATURE
(T = 0°C TO +125°C)
SET
A
TRIP THRESHOLD OFFSET vs.
TEMPERATURE
0.20
0.15
0.10
0.05
0
100
90
80
70
60
50
40
30
20
10
0
V
= +2.7V
CC
V
= +3.3V
CC
V
CC
= +5V
-0.05
-0.10
-0.15
-0.20
V
= +3.3V
CC
V
= +2.7V
0
CC
0
20
40
60
80 100 120 140
-50 -25
25
50
75 100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
TRIP POINT ERROR vs.
SET TEMPERATURE
HYSTERESIS vs. TEMPERATURE
12
10
8
1.0
0.9
0.8
0.7
0.6
0.5
0.4
0.3
0.2
0.1
0
V
= +5V
SET
CC
1% R
HYST = V
CC
SET RESISTOR TEMPCO
6
200ppm
R
SET
100ppm
4
HYST = GND
2
50ppm
50
0
-40 -25
0
25
50
75 100 125
-40 -25
0
25
75
100 125
TEMPERATURE (°C)
TEMPERATURE (°C)
_______________________________________________________________________________________
3
Resistor-Programmable
SOT Temperature Switches
Pin Description
PIN
NAME
MAX6509 MAX6510
FUNCTION
1
2
3
1
2
SET
GND
OUT
Temperature Set Point. Connect an external 1% resistor from SET to GND to set trip point.
Ground
—
Open-Drain Output. Reset to high impedance during power-on.
OUT,
OUT
Open-Drain with Internal Pull-Up Resistor, Active-High, or Active-Low Output.
See Table 1. Reset to deassert during power-on.
—
3
4
5
4
6
HYST
Hysteresis Selection. Hysteresis is 10°C for HYST = V , 2°C for HYST = GND.
CC
V
CC
Power-Supply Input
Trilevel Control Input:
OUTSET = V
OUTSET = GND sets OUT to active low.
sets OUT to active high.
CC
—
5
OUTSET
OUTSET = Unconnected sets OUT to open drain with internal pull-up resistor.
Hysteresis Input
Detailed Description
The HYST pin is a CMOS-compatible input that selects
The MAX6509/MAX6510 fully integrated temperature
switches incorporate two temperature-dependent refer-
ences and one comparator. One reference exhibits a
positive temperature coefficient, and the other has a
negative temperature coefficient. The temperature at
which the two reference voltages are equal determines
the temperature trip point. Pin-selectable 2°C or 10°C
hysteresis keeps the output from oscillating when the
temperature is close to the threshold. The MAX6509
has an active-low, open-drain output structure that can
only sink current. The MAX6510 has three different out-
put options from which to choose ꢀTable 1ꢁ.
hysteresis at either a high level ꢀ10°C for HYST = V
ꢁ
CC
or a low level ꢀ2°C for HYST = GNDꢁ. Hysteresis pre-
vents the output from oscillating when the temperature
is near the trip point. Do not leave HYST unconnected.
Connect HYST to GND or V . Other input voltages
CC
cause increased supply current.
Choose the set-hot temperature ꢀHꢁ or set-cold temper-
ature ꢀCꢁ option to ensure that the trip point is accurate
and the hysteresis is in the right direction. A MAX6509
or MAX6510 with the H suffix will first trip at the correct
point when temperature is increasing. For example, a
MAX6509HAUK-T or MAX6510HAUT-T with its trip point
set to 100°C will assert when its temperature rises
above +100°C, and will not deassert until its tempera-
ture drops below +100°C minus the selected hysteresis
value ꢀe.g., +98°C if 2°C hysteresis is chosenꢁ. Con-
versely, if the trip temperature of a MAX6509CAUK-T or
MAX6510CAUT-T is -40°C, the output asserts at
-40°C as temperature falls, and deasserts when tem-
perature rises above -40°C plus the hysteresis value
ꢀe.g., -38°C if 2°C hysteresis is chosenꢁ as shown in
Figure 4.
The MAX6509/MAX6510 are programmable for a wide
range of temperature thresholds from -40°C to +125°C.
The temperature threshold is set by an external resistor
between SET and GND. The MAX6509 output easily
interfaces with a microprocessor ꢀµPꢁ reset input
ꢀFigure 2ꢁ. The MAX6510 output is intended for applica-
tions such as driving a fan control switch ꢀFigure 3ꢁ.
Table 1. OUTSET-Selectable Outputs
OUTSET
OUT
Connected to V
Active high
Active low
CC
Output Selection
The MAX6509 provides an open-drain output. The
MAX6510 features three output options selectable by
OUTSET ꢀTable 1ꢁ.
Connected to GND
Open drain with internal
pull-up resistor
Unconnected
4
_______________________________________________________________________________________
Resistor-Programmable
SOT Temperature Switches
MAX6509
WITH A PULL-UP RESISTOR
V
OUT
OUT
NEGATIVE
TEMPCO
REFERENCE
POSITIVE
TEMPCO
REFERENCE
HYST
NETWORK
HYST
TEMP
T
TH
HYSTERESIS*
MAX6509HAUK-T
V
OUT
MAX6510
OUT
NEGATIVE
TEMPCO
REFERENCE
POSITIVE
TEMPCO
REFERENCE
HYST
NETWORK
HYST
TEMP
T
TH
OUTSET = V
CC
HYSTERESIS*
MAX6510HAUT-T
MAX6509
WITH A PULL-UP RESISTOR
V
OUT
OUT
NEGATIVE
TEMPCO
REFERENCE
POSITIVE
TEMPCO
REFERENCE
HYST
NETWORK
HYST
TEMP
T
TH
HYSTERESIS*
MAX6509CAUK-T
MAX6510
OUT
OUT
NEGATIVE
TEMPCO
REFERENCE
POSITIVE
TEMPCO
REFERENCE
HYST
NETWORK
HYST
TEMP
T
TH
OUTSET = V
CC
HYSTERESIS*
MAX6510CAUT-T
*HYSTERESIS IS 10°C FOR HYST = V AND 2°C FOR HYST = GND.
CC
Figure 1. Block and Functional Diagrams
_______________________________________________________________________________________
5
Resistor-Programmable
SOT Temperature Switches
+3.3V
+5V
V
V
HYST
SET
CC
CC
R
V
V
CC
PULL-UP
100k
OUTSET
CC
µP
FAN
HEAT
R
µP
MAX6510
MAX6509
INT
SET
SHUTDOWN
OR
OUT
SET
GND
OUT
RESET
HYST
GND
R
SET
HEAT
Figure 2. Microprocessor Alarm/Reset
Figure 3. Overtemperature Fan Control
Applications Information
100°C
Thermal Considerations
The MAX6509/MAX6510 supply current is typically
32µA. When used to drive high-impedance loads, the
devices dissipate negligible power; therefore, the die
temperature is essentially the same as the package
temperature. The key to accurate temperature monitor-
ing is good thermal contact between the MAX6509/
MAX6510 package and the device being monitored. In
some applications, the SOT23-5 and SOT23-6 pack-
ages may be small enough to fit underneath a socketed
µP, allowing the device to monitor the µP’s temperature
directly. Use the monitor’s output to reset the µP, assert
an interrupt, or trigger an external alarm. Accurate tem-
perature monitoring depends on the thermal resistance
between the device being monitored and the
MAX6509/MAX6510 die.
98°C
TEMPERATURE
-38°C
THYST = 2°C
-40°C
OUT
SET HOT
MAX6509H
100°C
98°C
OUT
SET COLD
MAX6510C
OUTSET = GND
-40°C
-38°C
The rise in die temperature due to self-heating is given
by the following formula:
Figure 4. Temperature Response
∆T = P
· θ
JA
J
DISS
and a set-hot device creates an over/undertemperature
detector. The MAX6509/MAX6510 are designed to form
two complementary pairs, each containing one cold trip
point output and one hot trip point output. The assertion
of either output alerts the system to an out-of-range tem-
perature. The MAX6510 push-pull output stages can be
ORed to produce a thermal out-of-range alarm. More
favorably, a MAX6509HAUK-T and MAX6509CAUK-T
can be directly wire-ORed with a single external resis-
tor to accomplish the same task ꢀFigure 5ꢁ.
where P
is the power dissipated by the
MAX6509/MAX6510, and θ is the package’s thermal
DISS
JA
resistance. The typical thermal resistance is 115°C/W
for the SOT23-6 package. To limit the effects of self-
heating, minimize the output currents. For example, if
the MAX6510 sinks 5mA, the output voltage is guaran-
teed to be less than 0.3V; therefore, an additional
1.5mW of power is dissipated within the IC. This corre-
sponds to a 0.173°C shift in the die temperature in the
SOT23-6.
The temperature window ꢀalarms or detectors as in
Figure 5ꢁ can be used to accurately determine when a
device’s temperature falls out of a programmed range,
for example -3°C to +75°C as shown in Figure 5. The
thermal overrange signal can be used to assert a ther-
Temperature-Window Detector
The MAX6509/MAX6510 temperature switch outputs
assert when the die temperature is outside the pro-
grammed range. Combining the outputs of a set-cold
6
_______________________________________________________________________________________
Resistor-Programmable
SOT Temperature Switches
+5V
+5V
V
CC
V
V
CC
OUTSET
R
30k
CC
SET
MAX6510HAUT
GND
TEMPERATURE
FAULT
MAX6510HAUT
HEAT
OVERTEMP
OUT
SET
GND
HYST
OUT
OUTSET
OUT OF RANGE
HYST
V
CC
R
30k
SET
µP
OUT
V
CC
UNDERTEMP
FAN
CONTROL
MAX6509CAUT
OUTSET
V
CC
HEAT
V
CC
OUT
HYST
SET
HYST
OUTSET
V
CC
GND
R
100k
SET
MAX6510HAUT
SET
R
GND
SET
+5V
55k
R
PULL-UP
100k
OUT OF RANGE
Figure 6. Low-Power, High-Reliability, Fail-Safe Temperature
Monitor
V
V
CC
CC
OUT
OUT
R
30k
SET
Set-Point Resistor
To set the trip-point temperature, connect a resistor
between SET and GND. The resistor’s value is deter-
MAX6509HAUK
MAX6509CAUK
GND
SET
GND
HYST
HYST
mined either from the R
vs. Temperature graphs
SET
R
100k
SET
ꢀsee Typical Operating Characteristicsꢁ or from the
equations below.
To set the temperature trip point from -40°C to 0°C, use
the following equation:
Figure 5. Temperature-Window Detector
R
SET
= [ꢀ1.3258 · 105ꢁ / ꢀT+1.3ꢁ] - 310.1693 -
[ꢀ5.7797 · 106ꢁ / ꢀT+1.3ꢁ2]
mal shutdown, power-up, recalibration, or other tem-
perature-dependent function.
To set the temperature trip point from 0°C to +125°C,
use the following equation:
Low-Cost, Fail-Safe Temperature Monitor
In high-performance/high-reliability applications, multi-
ple temperature monitoring is important. The high-level
integration and low cost of the MAX6509/MAX6510
facilitate the use of multiple temperature monitors to
increase system reliability. Figure 6 shows two
MAX6510s with different temperature thresholds. This
ensures that fault conditions that can overheat the mon-
itored device cause no permanent damage. The first
temperature monitor activates the fan when the die
temperature exceeds +45°C. The second MAX6510
triggers a system shutdown if the die temperature
reaches +75°C. The second temperature monitor’s out-
put asserts when a wide variety of destructive fault con-
ditions occur, including latchups, short circuits, and
cooling-system failures.
R
= [ꢀ8.3793 · 104ꢁ / T] - 211.3569 +
[ꢀ1.2989 · 105ꢁ / T2]
SET
where T is the trip temperature in Kelvin.
Chip Information
TRANSISTOR COUNT: 234
_______________________________________________________________________________________
7
Resistor-Programmable
SOT Temperature Switches
________________________________________________________Package Information
Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are
implied. Maxim reserves the right to change the circuitry and specifications without notice at any time.
8 _____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600
© 2000 Maxim Integrated Products
Printed USA
is a registered trademark of Maxim Integrated Products.
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