MAX6515UKP105+T

19-3147; Rev 1; 2/11 Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 The MAX6514/MAX6515 low-cost, fully integrated temperature switches assert a logic signal when their die temperature crosses a factory-programmed threshold. Operating from a 2.7V to 5.5V supply, these devices feature a fixed voltage reference, an analog temperature sensor, and a comparator. They are available with factory-trimmed temperature trip thresholds from -45°C to +15°C and +35°C to +115°C in 10°C increments, and are accurate to ±1°C (typ). These devices require no external components and typically consume 22µA of supply current. Hysteresis is pin selectable at 2°C or 10°C. The MAX6514/MAX6515 are offered with hot-temperature thresholds (+35°C to +115°C), asserting when the temperature is above the threshold or with cold-temperature thresholds (-45°C to +15°C), asserting when the temperature is below the threshold. The MAX6514/ MAX6515 can be used over a -35°C to +125°C range with a supply voltage of 2.7V to 5.5V. For applications sensing temperature down to -45°C, a supply voltage above 4.5V is required. The MAX6514 has an active-high, push-pull output. The MAX6515 has an active-low, open-drain output. These devices are available in a space-saving 5-pin SOT23 package and operate over the -55°C to +125°C temperature range. Applications Over/Undertemperature Protection Fan Control Test Equipment Temperature Control Temperature Alarms Notebook, Desktop PCs RAID Servers Features ♦ High-Accuracy ±1.5°C (max) over -15°C to +65°C Temperature Range ♦ Low-Power Consumption: 22µA Typical Current ♦ Factory-Programmed Thresholds from -45°C to +115°C in 10°C Increments ♦ Open-Drain or Push-Pull Outputs ♦ Pin-Selectable 2°C or 10°C Hysteresis Ordering Information TEMP RANGE MAX6514UK_ _ _ _+T -55°C to +125°C 5 SOT23 MAX6515UK_ _ _ _+T -55°C to +125°C 5 SOT23 Note: These parts are offered in 16 standard temperature versions with a minimum order of 2500 pieces. To complete the suffix information, add P or N for positive or negative trip temperature, and select an available trip point in degrees centigrade. For example, the MAX6514UKP065+T describes a MAX6514 in a 5-pin SOT23 package with a +65°C threshold in tape and reel (2.5k minimum order). Contact the factory for pricing and availability. +Denotes a lead(Pb)-free/RoHS-compliant package. T = Tape and reel. Typical Operating Circuit VCC 100kΩ VCC VCC TOVER 0.1μF Pin Configurations and Functional Diagram appear at end of data sheet. PINPACKAGE PART INT MAX6515 MICROCONTROLLER GND GND HYST GND ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com. 1 MAX6514/MAX6515 General Description MAX6514/MAX6515 Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 ABSOLUTE MAXIMUM RATINGS All Voltages Are Referenced to GND VCC ..........................................................................-0.3V to +6V TOVER, TUNDER (open drain)................................ -0.3V to +6V TOVER, TUNDER (push-pull)....................... -0.3V to VCC + 0.3V HYST .............................................................-0.3V to VCC + 0.3V Continuous Power Dissipation SOT23 (derate 3.1mW/°C above +70°C) .....................247mW Operating Temperature Range ........................-55°C to +125°C Junction Temperature ..................................................... +150°C Storage Temperature Range .............................-65°C to +150°C Lead Temperature (soldering, 10s) ................................ +300°C Soldering Temperature ....................................................+260°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, RPULLUP = 100kΩ, (open-drain output only), TA = -55°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C.) (Note 1) PARAMETER Supply Voltage Range Supply Current Temperature Threshold Accuracy (Note 2) SYMBOL CONDITIONS VCC ICC ΔTTH HYST Input Threshold (Note 4) THYST Hot-temperature thresholds (+35°C to +115°C) 22 Cold-temperature thresholds (-45°C to +15°C) 40 Logic Output Voltage Low (Push-Pull and Open Drain) VOL UNITS 5.5 V 40 -15°C to +65°C -1.5 +1.5 +75°C to +115°C -2.5 +2.5 -3 2 HYST = GND 10 °C 0.8 x VCC 0.2 x VCC ISOURCE = 500µA, VCC > 2.7V 0.8 x VCC ISOURCE = 800µA, VCC > 4.5V VCC - 1.5 V V ISINK = 1.2mA, VCC > 2.7V 0.3 ISINK = 3.2mA, VCC > 4.5V 0.4 VCC = 2.7V, open-drain output = 5.5V °C +3 HYST = VCC VIL VOH MAX µA VIH Logic Output Voltage High (Push-Pull) Open-Drain Output Leakage Current TYP 2.7 -45°C to -25°C (Note 3) Temperature Threshold Hysteresis MIN 10 V nA Note 1: 100% production tested at TA = +25°C. Specifications over temperature are guaranteed by design. Note 2: The MAX6514/MAX6515 are available with internal factory-programmed temperature trip thresholds from -45°C to +15°C and +35°C to +115°C in 10°C increments. Note 3: VCC must be greater than 4.5V for a switching threshold of -45°C. Note 4: Guaranteed by design. 2 _______________________________________________________________________________________ Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 SUPPLY CURRENT vs. TEMPERATURE TRIP THRESHOLD ACCURACY MAX6514 toc01 40 30 25 SUPPLY CURRENT (μA) PERCENTAGE OF PARTS SAMPLED (%) SAMPLE SIZE = 147 MAX6514 toc02 50 30 20 10 20 15 10 5 0 -1.25 TO -0.75 TO -0.25 TO 0.25 TO 0.75 TO 1.25 TO -1.5 0.5 1.0 1.5 -1.0 -0.5 0 -55 -35 -15 5 ACCURACY (°C) TOVER/TUNDER OUTPUT VOLTAGE HIGH vs. SOURCE CURRENT 45 65 85 105 125 TOVER/TUNDER OUTPUT VOLTAGE LOW vs. SINK CURRENT 4 MAX6514 toc04 500 MAX6514 toc03 5 400 3 VOL (V) VOH (V) 25 TEMPERATURE (°C) 300 2 200 1 100 0 0 0 1 2 3 4 5 6 7 8 9 10 0 ISINK (mA) 1 2 3 4 5 6 STARTUP AND POWER-DOWN (TEMP < TTH) 8 9 10 STARTUP DELAY (TEMP > TTH) MAX6514 toc06 MAX6514 toc05 TIME (400μs/div) 7 ISINK (mA) VCC (2V/div) VCC (2V/div) TOVER (2V/div) TOVER (2V/div) TIME = 100μs _______________________________________________________________________________________ 3 MAX6514/MAX6515 Typical Operating Characteristics (VCC = 4.5V, TA = +25°C, unless otherwise noted.) Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 MAX6514/MAX6515 Pin Description PIN NAME FUNCTION MAX6514 MAX6515 1, 2 1, 2 GND 3 3 HYST 4 4 VCC 5 — TOVER Push-Pull Active-High Output (Hot Threshold). TOVER goes high when the die temperature exceeds the factory-programmed hot-temperature threshold. — 5 TOVER Open-Drain, Active-Low Output (Hot Threshold). TOVER goes low when the die temperature exceeds the factory-programmed hot-temperature threshold. Connect to a 100kΩ pullup resistor. Can be pulled up to a voltage higher than VCC. 5 — TUNDER Push-Pull Active-High Output (Cold Threshold). TUNDER goes high when the die temperature falls below the factory-programmed cold-temperature threshold. — 5 TUNDER Open-Drain, Active-Low Output (Cold Threshold). TUNDER goes low when the die temperature goes below the factory-programmed cold-temperature threshold. Connect to a 100kΩ pullup resistor. Can be pulled up to a voltage higher than VCC. Ground Hysteresis Input. Connect to VCC for 2°C of hysteresis or to GND for 10°C hysteresis. Input Supply. Bypass to ground with a 0.1µF capacitor. Detailed Description Logic Temperature Indicators The MAX6514/MAX6515 fully integrated temperature switches incorporate a fixed reference, an analog temperature sensor, and a comparator. Pin-selectable 2°C or 10°C hysteresis keeps the digital output from oscillating when the die temperature approaches the threshold temperature. The MAX6514 has an activehigh, push-pull output structure that can sink or source current. The MAX6515 has an active-low, open-drain output structure that can only sink current. The internal power-on reset circuit guarantees the logic output is at its +25°C state for at least 50µs. Overtemperature Indicator (Hot Thresholds) TOVER and TOVER designations apply to thresholds above T A = +25°C (+35°C, +45°C, +55°C, +65°C, +75°C, +85°C, +95°C, +105°C, and +115°C). All “hot” thresholds are positive temperatures. The overtemperature indicator output is open drain active low (TOVER) or push-pull active high (TOVER). TOVER goes low when the die temperature exceeds the factory-programmed temperature threshold. TOVER should be pulled up to a voltage no greater than 5.5V with a 100kΩ pullup resistor. TOVER is a push-pull active-high CMOS output that goes high when the die temperature exceeds the factory-programmed temperature threshold. Hysteresis Input The HYST input selects the devices’ temperature hysteresis and prevents the output from oscillating when the temperature approaches the trip point. Connect HYST to VCC for 2°C hysteresis or to GND for 10°C hysteresis. 4 Undertemperature Indicator (Cold Thresholds) TUNDER and TUNDER designations apply to thresholds below TA = +25°C (+15°C, +5°C, -5°C, -15°C, -25°C, -35°C, -45°C). The undertemperature indicator output is open-drain, active low (TUNDER) or push-pull, active high (TUNDER). TUNDER goes low when the die temperature goes below the factory-programmed temperature threshold. TUNDER should be pulled up to a voltage no greater than 5.5V with a 100kΩ pullup resistor. TUNDER is a push-pull active-high CMOS output that goes high when the die temperature falls below the factory-programmed temperature threshold. _______________________________________________________________________________________ Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 Temperature-Window Alarm The MAX6515 logic output asserts when the die temperature is outside the factory-programmed range. Combining the outputs of two devices creates an over/undertemperature alarm. Two MAX6515s are used to form two complementary pairs, containing one cold trip-point output and one hot trip-point output. The assertion of either output alerts the system to an out-ofrange temperature (Figure 1). The thermal overrange signal can be used to assert a thermal shutdown, power-up, recalibration, or other temperature-dependent function. The typical thermal resistance is +140°C/W for the 5pin SOT23 package. To limit the effects of self-heating, minimize the output current. For example, if the MAX6514/MAX6515 sink 1mA, the open-drain output voltage is guaranteed to be less than 0.3V. Therefore, an additional 0.3mW of power is dissipated within the IC. This corresponds to a 0.042°C shift in the die temperature in the 5-pin SOT23 package. +5V 100kΩ OUT OF RANGE VCC Low-Cost, Fail-Safe Temperature In high-performance/high-reliability applications, multiple temperature monitoring is important. The high-level integration and low cost of the MAX6514/MAX6515 facilitate the use of multiple temperature monitors to increase system reliability. The Figure 2 application uses two MAX6514s with different hot-temperature thresholds to ensure 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 MAX6514 triggers a system shutdown if the die temperature reaches +75°C, preventing damage from a wide variety of destructive fault conditions, including latchups, short circuits, and cooling-system failures. TUNDER MAX6515UKP075 MAX6515UKN005 GND GND HYST GND GND HYST Figure 1. Temperature-Window Alarms Using the MAX6515 +5V VCC Thermal Considerations The MAX6514/MAX6515 supply current is typically 22µA. When used to drive high-impedance loads, the devices dissipate negligible power and self-heating effects are minimized. Accurate temperature monitoring depends on the thermal resistance between the device being monitored and the MAX6514/MAX6515 die. Heat flows in and out of plastic packages, primarily through the leads. Pin 2 of the 5-pin SOT23 package provides the lowest thermal resistance to the die. Short, wide copper traces between the MAX6514/MAX6515 and the objects whose temperature is being monitored ensure heat transfers occur quickly and reliably. The rise in die temperature due to self-heating is given by the following formula: ΔTJ = PDISSIPATION x θJA VCC TOVER SYSTEM SHUTDOWN TOVER MAX6514UKP075 HEAT μP GND GND HYST VCC HYST GND FAN CONTROL TOVER MAX6514UKP045 HEAT GND GND where P DISSIPATION is the power dissipated by the MAX6514/MAX6515, and θJA is the thermal resistance of the package. Figure 2. Low-Power, High-Reliability, Fail-Safe Temperature Monitor _______________________________________________________________________________________ 5 MAX6514/MAX6515 Applications Information MAX6514/MAX6515 Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 Table 1. Top Marks TOP MARK PART TOP MARK AEKU MAX6515UKN005 AEMK MAX6514UKN015 AEKV MAX6515UKN015 AEML MAX6514UKN025 AEKW MAX6515UKN025 AEMM MAX6514UKN035 AECV MAX6515UKN035 AECX MAX6514UKN045 AEKX MAX6515UKN045 AEMN MAX6514UKP005 AEKY MAX6515UKP005 AEMO MAX6514UKP015 AEKZ MAX6515UKP015 AEMP MAX6514UKP035 AELA MAX6515UKP035 AEMQ MAX6514UKP045 AELB MAX6515UKP045 AEMR MAX6514UKP055 AELC MAX6515UKP055 AEMS MAX6514UKP065 AELD MAX6515UKP065 AEMT MAX6514UKP075 AECW MAX6515UKP075 AECY MAX6514UKP085 AELE MAX6515UKP085 AEMU MAX6514UKP095 AELF MAX6515UKP095 AEMV MAX6514UKP105 AELG MAX6515UKP105 AEMW MAX6514UKP115 AELH MAX6515UKP115 AEMX PART MAX6514UKN005 Pin Configurations TOP VIEW HOT THRESHOLDS (+35°C TO +115°C) COLD THRESHOLDS (-45°C TO +15°C) GND GND 1 1 GND 2 5 (TOVER) TOVER (MAX6514) MAX6515 HYST 3 GND 2 4 Chip Information 6 4 VCC SOT23 SOT23 PROCESS: BiCMOS (TUNDER) TUNDER (MAX6514) MAX6515 HYST 3 VCC 5 Package Information For the latest package outline information and land patterns (footprints), go to www.maxim-ic.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+2 21-0057 90-0174 _______________________________________________________________________________________ Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 V MAX6514 (HOT THRESHOLD) TOVER TOVER NEGATIVE TEMPCO SENSOR MAX6514 FIXED REFERENCE HYST NETWORK HYST COLD +25°C HOT TEMP MAX6515 (HOT THRESHOLD) WITH 100kΩ PULLUP V TOVER TTH TOVER NEGATIVE TEMPCO SENSOR MAX6515 FIXED REFERENCE HYST NETWORK HYST COLD +25°C V HOT TEMP MAX6514 (COLD THRESHOLD) TUNDER TUNDER NEGATIVE TEMPCO SENSOR MAX6514 TTH FIXED REFERENCE HYST NETWORK HYST COLD TTH HOT TEMP MAX6515 (COLD THRESHOLD) WITH 100kΩ PULLUP V TUNDER +25°C TUNDER NEGATIVE TEMPCO SENSOR MAX6515 FIXED REFERENCE HYST NETWORK HYST COLD TTH +25°C HOT TEMP _______________________________________________________________________________________ 7 MAX6514/MAX6515 MAX6514/MAX6515 Functional Diagram MAX6514/MAX6515 Low-Cost, 2.7V to 5.5V Temperature Switches in a SOT23 Revision History REVISION NUMBER REVISION DATE 0 1/04 Initial release 2/11 Changed the leaded parts to lead(Pb)-free parts in the Ordering Information table; in the Absolute Maximum Ratings section changed the continuous power dissipation numbers (7.1mW/°C to 3.1mW/°C and 571mW to 247mW); added the Package Information table 1 DESCRIPTION PAGES CHANGED — 1, 2, 6 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 © 2011 Maxim Integrated Products Maxim is a registered trademark of Maxim Integrated Products, Inc.