LM27CIM5-1HJ

LM27 www.ti.com SNIS124D – AUGUST 2002 – REVISED JULY 2013 LM27 SOT-23, ±3°C Accurate, 120°C-150°C Factory Preset Thermostat Check for Samples: LM27 FEATURES DESCRIPTION • The LM27 is a precision, single digital-output, lowpower thermostat comprised of an internal reference, DAC, temperature sensor and comparator. Utilizing factory programming, it can be manufactured with different trip points as well as different digital output functionality. The trip point (TOS) can be preset at the factory to any temperature in the range of +120°C to +150°C in 1°C increments. The LM27 has one digital output (OS/OS/US/US), one digital input (HYST) and one analog output (VTEMP). The digital output stage can be preset as either open-drain or push-pull. In addition, it can be factory programmed to be active HIGH or LOW. The digital output can be factory programmed to indicate an over temperature shutdown event (OS or OS) or an under temperature shutdown event (US or US). When preset as an overtemperature shutdown (OS) it will go LOW to indicate that the die temperature is over the internally preset TOS and go HIGH when the temperature goes below (TOS–THYST). Similarly, when preprogrammed as an undertemperature shutdown (US) it will go HIGH to indicate that the temperature is below TUS and go LOW when the temperature is above (TUS+THYST). The typical hysteresis, THYST, can be set to 2°C or 10°C and is controlled by the state of the HYST pin. A VTEMP analog output provides a voltage that is proportional to temperature and has a −10.7mV/°C output slope. 1 2 • • • • • • • Internal Comparator with Pin Selectable 2°C or 10°C Hysteresis No External Components Required Open-drain or Push-pull Digital Output; Supports CMOS Logic Levels Internal Temperature Sensor with VTEMP Output Pin VTEMP Output Allows After-assembly System Testing Internal Voltage Reference and DAC for Trippoint Setting Currently Available in 5-pin SOT-23 Plastic Package Excellent Power Supply Noise Rejection APPLICATIONS • • • • • • • Microprocessor Thermal Management Appliances Portable Battery Powered Systems Fan Control Industrial Process Control HVAC Systems Electronic System Protection KEY SPECIFICATIONS • • • • Power Supply Voltage 2.7V to 5.5V Power Supply Current 40μA (Max), 15μA (Typ) Hysteresis Temperature 2°C or 10°C (Typ) Temperature Trip Point Accuracy ±3°C (Max) Currently, there are several standard parts available, see Table 1. For other part options, contact a Texas Instruments Distributor or Sales Representative for information on minimum order qualification. The LM27 is currently available in a 5-lead SOT-23 package. Simplified Block Diagram and Connection Diagram LM27CIM5-2HJ (140°C Trip-Point) TOS HYST OS HYST REF GND TEMP SENSOR TOS- THYST Temp. of Leads + OS VTEMP LM27-2HJ V+=2.7V to 5.5V HYST=GND for 10oC Hysteresis HYST=V+ for 2oC Hysteresis VTEMP=(-3.552x10-6x(T-30)2)+(-10.69576x10-3x(T-30))+1.8386V 1 2 Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. Copyright © 2002–2013, Texas Instruments Incorporated LM27 SNIS124D – AUGUST 2002 – REVISED JULY 2013 www.ti.com Table 1. Summary Table of Trip Point and Output Function Capabilities of Released Parts (1) Orderable Device Trip Point Temperature (°C) Digital Output Function LM27CIM5-ZHJ 120 Active-Low, Open-Drain, OS output LM27CIM5-1HJ 130 Active-Low, Open-Drain, OS output LM27CIM5-2HJ 140 Active-Low, Open-Drain, OS output (1) Other device options have not been released to market, contact Texas Instruments for volume and other requirements for release. Connection Diagram HYST GND VTEMP 1 2 5 OS, OS, US or US LM27 3 4 V+ PIN DESCRIPTIONS (1) Pin Number Pin Name 1 HYST Hysteresis control, digital input Function GND for 10°C or V+ for 2°C Connection 2 GND Ground, connected to the back side of the die through lead frame. System GND 3 VTEMP Analog output voltage proportional to temperature Leave floating or connect to a high impedance node. 4 V+ Supply input 2.7V to 5.5V with a 0.1µF bypass capacitor. For PSRR information see NOISE CONSIDERATIONS. 5 (1) OS Overtemperature Shutdown open-drain Controller interrupt, system or power supply shutdown; active low thermostat digital output pull-up resistor ≥ 10kΩ OS Overtemperature Shutdown totem-pull active high thermostat digital output Controller interrupt, system or power supply shutdown US Undertemperature Shutdown opendrain active low thermostat digital output System or power supply shutdown; pull-up resistor ≥ 10kΩ US Undertemperature Shutdown totempull active high thermostat digital output System or power supply shutdown Pin 5 functionality and trip point setting are programmed during LM27 manufacture. These devices have limited built-in ESD protection. The leads should be shorted together or the device placed in conductive foam during storage or handling to prevent electrostatic damage to the MOS gates. 2 Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: LM27 LM27 www.ti.com SNIS124D – AUGUST 2002 – REVISED JULY 2013 Absolute Maximum Ratings (1) Input Voltage 6.0V Input Current at any pin (2) 5mA Package Input Current (2) 20mA Package Dissipation at TA = 25°C (3) Soldering Information (4) 500mW Vapor Phase (60 seconds) SOT23 Package (1) (2) (3) (4) (5) 220°C −65°C to + 150°C Storage Temperature ESD Susceptibility (5) 215°C Infrared (15 seconds) Human Body Model 2500V Machine Model 250V Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the Electrical Characteristics. The specified specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. When the input voltage (VI) at any pin exceeds the power supply (VI < GND or VI > V+), the current at that pin should be limited to 5mA. The 20mA maximum package input current rating limits the number of pins that can safely exceed the power supplies with an input current of 5mA to four. Under normal operating conditions the maximum current that pins 2, 4 or 5 can handle is limited to 5mA each. The maximum power dissipation must be derated at elevated temperatures and is dictated by TJmax (maximum junction temperature), θJA (junction to ambient thermal resistance) and TA (ambient temperature). The maximum allowable power dissipation at any temperature is PD = (TJmax–TA)/θJA or the number given in the Absolute Maximum Ratings, whichever is lower. For this device, TJmax = 150°C. For this device the typical thermal resistance (θJA) of the different package types when board mounted refer to Table 2 See http://www.ti.com/packaging for other recommendations and methods of soldering surface mount devices. The human body model is a 100pF capacitor discharge through a 1.5kΩ resistor into each pin. The machine model is a 200pF capacitor discharged directly into each pin. Table 2. Package Type θJA SOT23-5, DBV 250°C/W Operating Ratings (1) TMIN ≤ TA ≤ TMAX Specified Temperature Range −40°C ≤ TA ≤ +150°C LM27CIM Positive Supply Voltage (V+) +2.7V to +5.5V Maximum VOUT (1) +5.5V Absolute Maximum Ratings indicate limits beyond which damage to the device may occur. Operating Ratings indicate conditions for which the device is functional, but do not ensure specific performance limits. For ensured specifications and test conditions, see the Electrical Characteristics. The specified specifications apply only for the test conditions listed. Some performance characteristics may degrade when the device is not operated under the listed test conditions. Submit Documentation Feedback Copyright © 2002–2013, Texas Instruments Incorporated Product Folder Links: LM27 3 LM27 SNIS124D – AUGUST 2002 – REVISED JULY 2013 www.ti.com LM27 Electrical Characteristics The following specifications apply for V+ = 2.7VDC to 5.5VDC, and VTEMP load current = 0µA unless otherwise specified. Boldface limits apply for TA = TJ = TMIN to TMAX; all other limits TA = TJ = 25°C unless otherwise specified. Parameter Symbol Conditions Typical (1) LM27CIM Limits (2) Units (Limits) ±3 °C (max) Temperature Sensor Trip Point Accuracy (Includes VREF, DAC, Comparator Offset, and Temperature Sensitivity errors) +120°C