TMP300BQDCKRQ1

TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com 1.8V, Resistor-Programmable TEMPERATURE SWITCH and ANALOG OUT TEMPERATURE SENSOR in SC70 Check for Samples: TMP300B-Q1 FEATURES DESCRIPTION • • • • • • • • • The TMP300B-Q1 is a low-power, resistor-programmable, digital output temperature switch. It allows a threshold point to be set by adding an external resistor. Two levels of hysteresis are available. The TMP300B-Q1 has a VTEMP analog output that can be used as a testing point or in temperature-compensation loops. 1 2 ACCURACY: ±1°C (typical at +25°C) PROGRAMMABLE TRIP POINT PROGRAMMABLE HYSTERESIS: 5°C/10°C OPEN-DRAIN OUTPUTS LOW-POWER: 110μA (max) WIDE VOLTAGE RANGE: +1.8V to +18V OPERATION: –40°C to +150°C ANALOG OUT: 10mV/°C SC70-6 PACKAGE With a supply voltage as low as 1.8V and low current consumption, the TMP300B-Q1 is ideal for power-sensitive systems. Available in two micropackages that have proven thermal characteristics, this part gives a complete and simple solution for users who need simple and reliable thermal management. APPLICATIONS • • • • • QUALIFIED FOR for AUTOMOTIVE APPLICATIONS POWER-SUPPLY SYSTEMS DC-DC MODULES THERMAL MONITORING ELECTRONIC PROTECTION SYSTEMS V+ 3mA TMP300B-Q1 TSET 1 6 V+ GND 2 5 VTEMP OUT 3 4 HYSTSET Proportional to TA RPULL-UP VTEMP OUT TSET RSET 210kW (1) SC70-6 TMP300 HYSTSET NOTE: (1) Thinfilm resistor with approximately 10% accuracy; however, this accuracy error is trimmed out at the factory. 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 © 2011, Texas Instruments Incorporated TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com This integrated circuit can be damaged by ESD. Texas Instruments recommends that all integrated circuits be handled with appropriate precautions. Failure to observe proper handling and installation procedures can cause damage. ESD damage can range from subtle performance degradation to complete device failure. Precision integrated circuits may be more susceptible to damage because very small parametric changes could cause the device not to meet its published specifications. ORDERING INFORMATION (1) (1) ORDERABLE P/N TA PACKAGE TOP SIDE SYMBOL TMP300BQDCKRQ1 or TMP300B-Q1 -40°C to 125°C SC70 - DCK | Reel of 3000 SBG For the most current package and ordering information see the Package Option Addendum at the end of this document, or see the TI web site at www.ti.com. ABSOLUTE MAXIMUM RATINGS (1) Supply Voltage V+ Signal Input Terminals, Voltage (2) Signal Input Terminals, Current (2) Output Short-Circuit (3) VALUE UNIT +18 V –0.5 to (V+) + 0.5 V ±10 mA ISC Open-Drain Output Continuous (V+) + 0.5 V Operating Temperature TA –40 to +150 °C Storage Temperature TA –55 to +150 °C Junction Temperature TJ +150 °C Human Body Model (HBM) 4000 V Charged Device Model (CDM) 1000 V Machine Model (MM) 200 V ESD Rating (1) (2) (3) 2 Stresses above these ratings may cause permanent damage. Exposure to absolute maximum conditions for extended periods may degrade device reliability. These are stress ratings only, and functional operation of the device at these or any other conditions beyond those specified is not supported. Input terminals are diode-clamped to the power-supply rails. Input signals that can swing more than 0.5V beyond the supply rails should be current limited to 10mA or less. Short-circuit to ground. Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com ELECTRICAL CHARACTERISTICS At VS = 3.3V and TA = –40°C to +125°C, unless otherwise noted. TMP300B-Q1 PARAMETER TEST CONDITIONS MIN VS = 2.35V to 18V TYP MAX UNIT –40 +125 °C –40 100 × (VS – 0.95) °C TEMPERATURE MEASUREMENT Measurement Range VS = 1.8V to 2.35V TRIP POINT Total Accuracy TA = –40°C to +125°C ±2 RSET Equation TC is in °C RSET = 10 (50 + TC)/3 ±6 °C kΩ HYSTERESIS SET INPUT (1) LOW Threshold HIGH Threshold 0.4 (1) V VS – 0.4 Threshold Hysteresis V HYSTSET = GND 5 °C HYSTSET = VS 10 °C DIGITAL OUTPUT Logic Family CMOS Open-Drain Leakage Current (1) OUT = VS 10 μA VS = 1.8V to 18V, ISINK = 5mA 0.3 V Logic Levels VOL ANALOG OUTPUT Accuracy ±2 Temperature Sensitivity 10 Output Voltage (1) TA = +25°C 720 VTEMP Pin Output Resistance 750 ±5 °C mV/°C 780 mV 210 kΩ POWER SUPPLY Quiescent Current (2) IQ VS = 1.8V to 18V, TA = –40°C to +125°C 110 μA –40 +125 °C VS = 1.8V to 2.35V –40 100 × (VS – 0.95) °C VS = 2.35V to 18V –40 +150 °C –50 100 × (VS – 0.95) °C TEMPERATURE RANGE VS = 2.35V to 18V Specified Range TA Operating Range TA Thermal Resistance θJA (1) (2) VS = 1.8V to 2.35V SC70 250 °C/W SOT23-6 180 °C/W Specified by design. Not production tested. See Figure 1 for typical quiescent current. Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 3 TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS At VS = 5V, unless otherwise noted. QUIESCENT CURRENT OVER TEMPERATURE AND SUPPLY RSET SHIFT DUE TO RSET TOLERANCE 2.0 95 TERROR + 1% 1.5 85 1.0 75 Error (°C) IQ (mA) VS = 18V VS = 3.3V 65 VS = 1.8V 0.5 TERROR + 0.1% 0 TERROR - 0.1% -0.5 -1.0 55 -1.5 45 -40 -25 0 25 50 75 100 TERROR - 1% -2.0 -40 -25 125 25 0 Figure 1. 4.0 600 3.0 125 100 125 2.0 Error (°C) RSET (kW) 100 TYPICAL TRIP ERROR 700 500 400 300 200 1.0 0 -1.0 -2.0 100 -3.0 0 -40 -25 0 25 50 75 100 -4.0 -40 -25 125 0 Temperature (°C) 50 75 Figure 4. TYPICAL ANALOG OUTPUT ERROR ANALOG PSR OVER TEMPERATURE 0.10 3.0 2.5 0.08 2.0 1.5 0.06 0.04 Error (°C/V) 1.0 0.5 0 -0.5 -1.0 -1.5 -2.0 -2.5 -3.0 -40 -25 25 Temperature (°C) Figure 3. Error (°C) 75 Figure 2. RSET vs TEMPERATURE TMAX is +85°C for VS = 1.8V to 3.3V 0.02 0 3.3V to 18V -0.02 -0.04 -0.06 -0.08 0 25 50 75 100 125 -0.10 -40 -25 Temperature (°C) 0 25 50 75 100 125 Temperature (°C) Figure 5. 4 50 Temperature (°C) Temperature (°C) Figure 6. Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com TYPICAL CHARACTERISTICS (continued) At VS = 5V, unless otherwise noted. TRIP PSR OVER TEMPERATURE 0.10 0.08 0.06 Error (°C/V) 0.04 0.02 3.3V to 18V 0 -0.02 -0.04 -0.06 TMAX is +85°C for VS = 1.8V to 3.3V -0.08 -0.10 -40 -25 0 25 50 75 100 125 Temperature (°C) Figure 7. Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 5 TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com APPLICATIONS INFORMATION To set the TMP300B-Q1 to trip at a preset value, calculate the RSET resistor value according to Equation 1 or Equation 2: (TSET ´ 0.01 + 0.5) RSET = -6 3e (1) The TMP300B-Q1 is a thermal sensor designed for over-temperature protection circuits in electronic systems. The TMP300B-Q1 uses a set resistor to program the trip temperature of the digital output. An additional high-impedance (210kΩ) analog voltage output provides the temperature reading. Where TSET is in °C; or 10(50 + TSET) RSET in kW = 3 CALCULATING RSET The set resistor (RSET) provides a threshold voltage for the comparator input. The TMP300B-Q1 trips when the VTEMP pin exceeds the TSET voltage. The value of the set resistor is determined by the analog output function and the 3μA internal bias current. (2) Where TSET is in °C. USING VTEMP TO TRIP THE DIGITAL OUTPUT The analog voltage output can also serve as a voltage input that forces a trip of the digital output to simulate a thermal event. This simulation facilitates easy system design and test of thermal safety circuits, as shown in Figure 8. V+ 3 mA Voltage source to test trip point. Proportional to TA VTEMP OUT Open-Drain Control TSET RINT 210kW RSET TMP300 HYSTSET Figure 8. Applying Voltage to Trip Digital Output 6 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com ANALOG TEMPERATURE OUTPUT USING A DAC TO SET THE TRIP POINT The analog out or VTEMP pin is high-impedance (210kΩ). Avoid loading this pin to prevent degrading the analog out value or trip point. Buffer the output of this pin when using it for direct thermal measurement. Figure 9 shows buffering of the analog output signal. The trip point is easily converted by changing the digital-to-analog converter (DAC) code. This technique can be useful for control loops where a large thermal mass is being brought up to the set temperature and the OUT pin is used to control the heating element. The analog output can be monitored in a control algorithm that adjusts the set temperature to prevent overshoot. Trip set voltage error versus temperature is shown in Figure 10, which shows error in °C of the comparator input over temperature. An alternative method of setting the trip point by using a DAC is shown in Figure 11. Analog Out OPA335 V+ 1.00 Proportional to TA 0.75 VTEMP Trip Set Voltage Error (°C) 3mA OUT TSET 210kW TMP300 0.50 0.25 0 -0.25 -0.50 -0.75 HYSTSET -1.00 -50 -25 Figure 9. Buffering the Analog Output Signal 0 25 50 75 100 125 Temperature (°C) Figure 10. Trip Set Voltage Error vs Temperature V+ 3 mA Voltage source to test trip point. Proportional to TA VTEMP OUT Open-Drain Control TSET 210kW DAC8560 TMP300 HYSTSET Figure 11. DAC Generates the Voltage-Driving TSET Pin Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 7 TMP300B-Q1 SBOS586 – DECEMBER 2011 www.ti.com HYSTERESIS The hysteresis pin has two settings. Grounding HYSTSET results in 5°C of hysteresis. Connecting it to VS results in 10°C of hysteresis. Hysteresis error variation over temperature is shown in Figure 12 and Figure 13. Bypass capacitors should be used on the supplies as well as on the RSET and analog out (VTEMP) pins when in noisy environments, as shown in Figure 14. These capacitors reduce premature triggering of the comparator. 5 4 4 3 3 2 Error (°C) 2 Error (°C) 5 Maximum 1 0 -1 -2 Average Maximum 1 0 -1 Average -2 Minimum -3 -3 -4 -4 -5 -50 -5 -50 Minimum -25 0 25 50 75 100 -25 0 25 50 75 100 125 Temperature (°C) 125 Temperature (°C) Figure 13. 10°C Hysteresis Error vs Temperature Figure 12. 5°C Hysteresis Error vs Temperature V+ 3mA Proportional to TA VTEMP OUT Open-Drain Control TSET CBYPASS CBYPASS 210kW RSET TMP300 HYSTSET Figure 14. Bypass Capacitors Prevent Early Comparator Toggling Due to Circuit Board Noise 8 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated Product Folder Link(s): TMP300B-Q1 PACKAGE OPTION ADDENDUM www.ti.com 10-Dec-2020 PACKAGING INFORMATION Orderable Device Status (1) Package Type Package Pins Package Drawing Qty Eco Plan (2) Lead finish/ Ball material MSL Peak Temp Op Temp (°C) Device Marking (3) (4/5) (6) TMP300BQDCKRQ1 ACTIVE SC70 DCK 6 3000 RoHS & Green NIPDAU Level-1-260C-UNLIM -40 to 125 SBG (1) The marketing status values are defined as follows: ACTIVE: Product device recommended for new designs. LIFEBUY: TI has announced that the device will be discontinued, and a lifetime-buy period is in effect. NRND: Not recommended for new designs. Device is in production to support existing customers, but TI does not recommend using this part in a new design. PREVIEW: Device has been announced but is not in production. Samples may or may not be available. OBSOLETE: TI has discontinued the production of the device. (2) RoHS: TI defines "RoHS" to mean semiconductor products that are compliant with the current EU RoHS requirements for all 10 RoHS substances, including the requirement that RoHS substance do not exceed 0.1% by weight in homogeneous materials. Where designed to be soldered at high temperatures, "RoHS" products are suitable for use in specified lead-free processes. TI may reference these types of products as "Pb-Free". RoHS Exempt: TI defines "RoHS Exempt" to mean products that contain lead but are compliant with EU RoHS pursuant to a specific EU RoHS exemption. Green: TI defines "Green" to mean the content of Chlorine (Cl) and Bromine (Br) based flame retardants meet JS709B low halogen requirements of