MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches ________________General Description ____________________________Features The MAX6509/MAX6510 are fully integrated, resistorprogrammable temperature switches with thresholds set by an external resistor. They require only one external 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. These switches operate with a +2.7V to +5.5V single supply while providing a temperature threshold accuracy of ±0.5°C (typ) or ±4.7°C (max). They typically consume 32µA supply current. Hysteresis is pin selectable to 2°C or 10°C. o ±0.5°C Threshold Accuracy o ±4.7°C (max) Threshold Accuracy (-40°C to +125°C) o Temperature Threshold Set by a 1% External Resistor o Set-Hot or Set-Cold Option o Low 32µA Supply Current o Open-Drain, Push-Pull Outputs; Open-Drain with Internal Pull-Up Resistor o Pin-Selectable 2°C or 10°C Hysteresis o SOT23 Packages The MAX6509/MAX6510 are available in 5-pin and 6-pin SOT23 packages, respectively. Ordering Information ________________________Applications µP Temperature Monitoring in High-Speed Computers Temperature Control Temperature Alarms Fan Control Automotive PART* TEMP. RANGE PINPACKAGE TOP MARK MAX6509CAUK+T -40°C to +125°C 5 SOT23-5 ADNT MAX6509HAUK+T -40°C to +125°C 5 SOT23-5 ADNU MAX6510CAUT+T** -40°C to +125°C 6 SOT23-6 AAHA MAX6510HAUT+T** 6 SOT23-6 AAHB -40°C to +125°C +Denotes a lead(Pb)-free/RoHS-compliant package. *A minimum order of 2500 pc. 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 VCC + VCC + 5 VCC SET 1 MAX6509 SET OUT MAX6510 (OUT) RSET (OUTSET) GND HYST INT µP SET 1 MAX6509 6 VCC MAX6510 GND 2 5 OUTSET GND 2 GND GND 4 HYST OUT 3 OUT, OUT 3 SOT23-5 4 HYST SOT23-6 ( ) ARE FOR MAX6510. For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com. 19-1617; Rev 3; 5/13 MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches ABSOLUTE MAXIMUM RATINGS Reference to GND Supply Voltage (VCC).................-0.3V to +6V OUT (MAX6509) ....................................................-0.3V to +6V OUT, OUT (MAX6510).............................-0.3V to (VCC + 0.3V) SET, HYST, OUTSET ..................................-0.3V to (VCC + 0.3V) Output Current (all pins) .....................................................20mA Input Current (all pins) ........................................................20mA Continuous Power Dissipation (TA = +70°C) 5-Pin SOT23 (derate 7.1mW/°C above +70°C).............571mW 6-Pin SOT23 (derate 8.7mW/°C above +70°C).............696mW Operating Temperature Range .........................-40°C to +125°C Junction Temperature ......................................................+150°C Storage Temperature Range .............................-65°C to +150°C Soldering Temperature (reflow) .......................................+260°C Lead Temperature (soldering, 10s) .................................+300°C 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 (VCC = +2.7V to +5.5V, TA = TMIN to TMAX, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Supply Voltage Range Supply Current SYMBOL CONDITIONS TYP 2.7 VCC ICC MIN ΔTTH Temperature Threshold Hysteresis THYST 5.5 V 32 50 OUTSET = GND or VCC (MAX6510) 47 80 µA µA 97 165 TA = 0°C to +125°C ±0.5 ±4.7 TA = -40°C to 0°C ±0.5 ±3.7 HYST = GND 2 HYST = VCC 10 µA VCC - 0.4 VIH 0.4 VIL OUT Impedance to VCC OUTSET = unconnected (MAX6510) 60 °C °C 1 HYST Input Leakage HYST Input Threshold UNITS MAX6509 OUTSET = unconnected, OUT = low Temperature Threshold Accuracy MAX 100 160 VCC - 0.4 V kΩ Output Voltage High VOH IOUT = 5mA, OUTSET = GND or VCC Output Voltage Low VOL IOUT = 5mA 0.3 V Open-Drain Output Leakage Current IOUT VOUT = VCC (MAX6509) 10 µA 0.2 · VCC OUT, active low OUTSET Voltage OUTSET Current VOUTSET IOUTSET MAX6510 MAX6510 V OUT, active high 0.85 · VCC OUT, open drain 0.72 · VCC V 0.55 · VCC VOUTSET = GND -5.5 VOUTSET = VCC 5.5 OUTSET = unconnected µA ±0.1 Note 1: 100% production tested at TA = +25°C. Specifications over temperature limits are guaranteed by design. 2 Maxim Integrated MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches __________________________________________Typical Operating Characteristics (VCC = +5V, RPULL-UP = 10kΩ (MAX6509 only), TA = +25°C, unless otherwise noted.) RSET vs. TEMPERATURE (TA = -40°C TO 0°C) SUPPLY CURRENT vs. TEMPERATURE VCC = +5V 150 140 VCC = +3.3V RSET (kΩ) 35 30 VCC = +2.7V 25 130 120 110 20 100 RSET = 0 OUTSET = GND (MAX6510) 10 -50 -25 0 25 90 50 75 100 125 -40 -35 -30 TEMPERATURE (°C) -20 -15 -10 -5 0 TRIP THRESHOLD OFFSET vs. TEMPERATURE RSET vs. TEMPERATURE (TA = 0°C TO +125°C) 0.20 90 80 70 60 50 40 30 0.15 SET POINT OFFSET (°C) MAX6509/10 toc03 100 RSET (kΩ) -25 TEMPERATURE (°C) VCC = +2.7V 0.10 MAX6509/10 toc04 15 VCC = +3.3V VCC = +5V 0.05 0 -0.05 VCC = +3.3V -0.10 20 -0.15 VCC = +2.7V 10 -0.20 0 0 20 40 60 80 100 120 -50 140 -25 TRIP POINT ERROR vs. SET TEMPERATURE MAX6509/10 toc05 0.8 50 75 100 125 HYSTERESIS vs. TEMPERATURE VCC = +5V 1% RSET SET RESISTOR TEMPCO 0.9 25 TEMPERATURE (°C) TEMPERATURE (°C) 1.0 0 12 MAX6509/10 toc06 SUPPLY CURRENT (µA) 40 160 MAX6509/10 toc02 45 MAX6509/10 toc01 50 HYST = VCC 10 HYSTERESIS (°C) ⎪ERROR⎪ (°C) 0.7 0.6 0.5 RSET 0.4 200ppm 100ppm 0.3 8 6 4 HYST = GND 0.2 2 0.1 50ppm 0 -40 -25 0 25 50 75 TEMPERATURE (°C) Maxim Integrated 100 125 0 -40 -25 0 25 50 75 100 125 TEMPERATURE (°C) 3 MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches Pin Description PIN NAME FUNCTION 1 SET Temperature Set Point. Connect an external 1% resistor from SET to GND to set trip point. 2 2 GND Ground 3 — OUT Open-Drain Output. Reset to high impedance during power-on. — 3 OUT, OUT Open-Drain with Internal Pull-Up Resistor, Active-High, or Active-Low Output. See Table 1. Reset to deassert during power-on. 4 4 HYST Hysteresis Selection. Hysteresis is 10°C for HYST = VCC, 2°C for HYST = GND. 5 6 VCC MAX6509 MAX6510 1 — 5 OUTSET Power-Supply Input Trilevel Control Input: OUTSET = VCC sets OUT to active high. OUTSET = GND sets OUT to active low. OUTSET = Unconnected sets OUT to open drain with internal pull-up resistor. Detailed Description The MAX6509/MAX6510 fully integrated temperature switches incorporate two temperature-dependent references 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 output options from which to choose (Table 1). 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 (µP) reset input (Figure 2). The MAX6510 output is intended for applications such as driving a fan control switch (Figure 3). Table 1. MAX6510 OUTSET-Selectable Outputs 4 OUTSET OUT Connected to VCC Active high Connected to GND Active low Unconnected Open drain with internal pull-up resistor Hysteresis Input The HYST pin is a CMOS-compatible input that selects hysteresis at either a high level (10°C for HYST = VCC) or a low level (2°C for HYST = GND). Hysteresis prevents the output from oscillating when the temperature is near the trip point. Do not leave HYST unconnected. Connect HYST to GND or VCC. Other input voltages cause increased supply current. Choose the set-hot temperature (H) or set-cold temperature (C) 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 temperature drops below +100°C minus the selected hysteresis value (e.g., +98°C if 2°C hysteresis is chosen). Conversely, 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 temperature rises above -40°C plus the hysteresis value (e.g., -38°C if 2°C hysteresis is chosen) as shown in Figure 4. Output Selection The MAX6509 provides an open-drain output. The MAX6510 features three output options selectable by OUTSET (Table 1). Maxim Integrated MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches OUT MAX6509 WITH A PULL-UP RESISTOR V OUT NEGATIVE TEMPCO REFERENCE POSITIVE TEMPCO REFERENCE HYST NETWORK HYST TTH TEMP HYSTERESIS* MAX6509HAUK+T MAX6510 V OUT OUT NEGATIVE TEMPCO REFERENCE POSITIVE TEMPCO REFERENCE OUTSET = VCC HYST NETWORK HYST TTH TEMP HYSTERESIS* MAX6510HAUT+T OUT MAX6509 WITH A PULL-UP RESISTOR V OUT NEGATIVE TEMPCO REFERENCE POSITIVE TEMPCO REFERENCE HYST NETWORK HYST TEMP TTH HYSTERESIS* MAX6509CAUK+T MAX6510 OUT OUT NEGATIVE TEMPCO REFERENCE POSITIVE TEMPCO REFERENCE OUTSET = VCC HYST NETWORK HYST MAX6510CAUT+T TTH TEMP HYSTERESIS* *HYSTERESIS IS 10°C FOR HYST = VCC AND 2°C FOR HYST = GND. Figure 1. Block and Functional Diagrams Maxim Integrated 5 MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches +3.3V +5V RPULL-UP 100k VCC µP MAX6509 µP INT SHUTDOWN OR RESET OUT HEAT HYST VCC OUTSET VCC VCC HEAT SET GND HYST SET MAX6510 GND FAN RSET OUT RSET Figure 2. Microprocessor Alarm/Reset Figure 3. Overtemperature Fan Control Applications Information 100°C T THRESHOLD = 65°C 98°C TEMPERATURE -38°C THYST = 2°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 monitoring is good thermal contact between the MAX6509/ MAX6510 package and the device being monitored. In some applications, the SOT23-5 and SOT23-6 packages 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 temperature monitoring depends on the thermal resistance between the device being monitored and the MAX6509/MAX6510 die. The rise in die temperature due to self-heating is given by the following formula: ΔTJ = PDISS · θJA where P DISS is the power dissipated by the MAX6509/MAX6510, and θJA is the package’s thermal resistance. The typical thermal resistance is 115°C/W for the SOT23-6 package. To limit the effects of selfheating, minimize the output currents. For example, if the MAX6510 sinks 5mA, the output voltage is guaranteed to be less than 0.3V; therefore, an additional 1.5mW of power is dissipated within the IC. This corresponds to a 0.173°C shift in the die temperature in the SOT23-6. Temperature-Window Detector The MAX6509/MAX6510 temperature switch outputs assert when the die temperature is outside the programmed range. Combining the outputs of a set-cold and a set-hot device creates an over/undertemperature 6 -40°C T THRESHOLD = -10°C OUT SET HOT MAX6509H 100°C 98°C OUT SET COLD MAX6510C OUTSET = GND -40°C -38°C Figure 4. Temperature Response 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 temperature. 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 resistor to accomplish the same task (Figure 5). The temperature window (alarms or detectors as in Figure 5) 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 thermal shutdown, power-up, recalibration, or other temperature-dependent function. Maxim Integrated MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches +5V +5V VCC MAX6510HAUT GND RSET 30k VCC OVERTEMP HYST OUTSET HEAT OUT HYST MAX6510CAUT OUTSET HYST RSET 30k UNDERTEMP FAN CONTROL VCC HEAT SET GND SET µP OUT VCC TEMPERATURE FAULT OUT GND OUT OF RANGE VCC VCC OUTSET MAX6510HAUT VCC OUT HYST RSET 100k OUTSET VCC MAX6510HAUT SET +5V RPULL-UP 100k VCC RSET 30k RSET 55k OUT OF RANGE VCC OUT MAX6509HAUK OUT Figure 6. Low-Power, High-Reliability, Fail-Safe Temperature Monitor MAX6509CAUK GND GND HYST Set-Point Resistor SET HYST RSET 100k Figure 5. Temperature-Window Detector Low-Cost, Fail-Safe Temperature Monitor In high-performance/high-reliability applications, multiple 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 monitored 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 output asserts when a wide variety of destructive fault conditions occur, including latchups, short circuits, and cooling-system failures. Maxim Integrated GND To set the trip-point temperature, connect a resistor between SET and GND. The resistor’s value is determined either from the RSET vs. Temperature graphs (see Typical Operating Characteristics ) or from the equations below. To set the temperature trip point from -40°C to 0°C, use the following equation: RSET(kΩ) = [(1.3258 · 105) / (T+1.3)] - 310.1693 [(5.7797 · 106) / (T+1.3)2] To set the temperature trip point from 0°C to +125°C, use the following equation: RSET(kΩ) = [(8.3793 · 104) / T] - 211.3569 + [(1.2989 · 105) / T2] where T is the trip temperature in Kelvin. 7 MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches Package Information Chip Information TRANSISTOR COUNT: 234 8 For the latest package outline information and land patterns (footprints), go to www.maximintegrated.com/packages. Note that a “+”, “#”, or “-” in the package code indicates RoHS status only. Package drawings may show a different suffix character, but the drawing pertains to the package regardless of RoHS status. PACKAGE TYPE PACKAGE CODE OUTLINE NO. LAND PATTERN NO. 5 SOT23 U5+1 21-0057 90-0175 6 SOT23 U6+1 21-0058 90-0174 Maxim Integrated MAX6509/MAX6510 Resistor-Programmable SOT Temperature Switches Revision History REVISION NUMBER REVISION DATE 3 5/13 DESCRIPTION Converted OPNs in Ordering Information to lead(Pb)-free PAGES CHANGED 1 Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values (min and max limits) shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated 160 Rio Robles, San Jose, CA 95134 USA 1-408-601-1000 _________________________________ 9 © 2013 Maxim Integrated Products, Inc. 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