Datasheet

ManualsBrandsTEXAS INSTRUMENTS ManualsPMICsSM72480SDE-120/NOPB

1 6

GND

TRIP

TEST

TEMP

OVERTEMP

DAP

SM72480

www.ti.com

SNIS156C –NOVEMBER 2010–REVISED APRIL 2013

SM72480 SolarMagic 1.6V, WSON-6 Factory Preset Temperature Switch and Temperature

Sensor

Check for Samples: SM72480

FEATURES

DESCRIPTION

The SM72480 is a low-voltage, precision, dual-output,

• Renewable Energy Grade

low-power temperature switch and temperature

• Low 1.6V Operation

sensor. The temperature trip point (T

TRIP

) is set at the

• Latching Function: Device Can Latch the Over

factory to be 120°C. Built-in temperature hysteresis

Temperature Condition

HYST

) keeps the output stable in an environment of

temperature instability.

• Push-pull and Open-Drain Temperature Switch

Outputs

In normal operation the SM72480 temperature switch

outputs assert when the die temperature exceeds

• Very Linear Analog V

TEMP

Temperature Sensor

TRIP

. The temperature switch outputs will reset when

Output

the temperature falls below a temperature equal to

• V

TEMP

Output Short-circuit Protected

TRIP

− T

HYST

). The OVERTEMP digital output, is

• 2.2 mm by 2.5 mm (typ) WSON-6 Package

active-high with a push-pull structure, while the

OVERTEMP digital output, is active-low with an open-

• Excellent Power Supply Noise Rejection

drain structure.

APPLICATIONS

The analog output, V

TEMP

, delivers an analog output

voltage with Negative Temperature Coefficient —

• PV Power Optimizers

NTC.

• Wireless Transceivers

Driving the TRIP TEST input high: (1) causes the

• Battery Management

digital outputs to be asserted for in-situ verification

• Automotive

and, (2) causes the threshold voltage to appear at the

• Disk Drives

TEMP

output pin, which could be used to verify the

temperature trip point.

KEY SPECIFICATIONS

The SM72480's low minimum supply voltage makes it

ideal for 1.8 volt system designs. Its wide operating

• Supply Voltage 1.6V to 5.5V

range, low supply current , and excellent accuracy

• Supply Current 8 μA (typ)

provide a temperature switch solution for a wide

• Accuracy, Trip Point Temperature 0°C to 150°C

range of commercial and industrial applications.

±2.2°C

• Accuracy, VTEMP 0°C to 150°C ±2.3°C

• VTEMP Output Drive ±100 μA

• Operating Temperature −50°C to 150°C

• Hysteresis Temperature 4.5°C to 5.5°C

Connection Diagram

Figure 1. WSON-6 - Top View

See Package Number NGF0006A

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.

2All 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.

Summary of content (26 pages)

PAGE 1
SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 SM72480 SolarMagic 1.6V, WSON-6 Factory Preset Temperature Switch and Temperature Sensor Check for Samples: SM72480 FEATURES DESCRIPTION • • • The SM72480 is a low-voltage, precision, dual-output, low-power temperature switch and temperature sensor. The temperature trip point (TTRIP) is set at the factory to be 120°C. Built-in temperature hysteresis (THYST) keeps the output stable in an environment of temperature instability.
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SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com Typical Transfer Characteristic Figure 2. VTEMP Analog Voltage vs Die Temperature VTEMP OUTPUT VOLTAGE (mV) 3500 3000 120oC ± 125oC Trip 2500 105oC Trip 2000 1500 1000 500 0 0 -50 50 100 150 DIE TEMPERATURE (oC) Block Diagram VDD 4 TRIP TEST = 0 (Default) SM72480 6 TRIP TEST = 1 VTS 3 VTEMP OVERTEMP VTRIP VDD TEMP SENSOR TEMP THRESHOLD 5 2 GND OVERTEMP 1 TRIP TEST PIN DESCRIPTIONS Pin No.
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SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 PIN DESCRIPTIONS (continued) Pin No. Name Type Equivalent Circuit Description VDD 5 OVERTEMP Over Temperature Switch output Active High, Push-Pull Asserted when the measured temperature exceeds the Trip Point Temperature or if TRIP TEST = 1 This pin may be left open if not used.
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SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com Absolute Maximum Ratings (1) −0.3V to +6.0V Supply Voltage −0.3V to +6.0V Voltage at OVERTEMP pin Voltage at OVERTEMP and VTEMP pins −0.3V to (VDD + 0.5V) TRIP TEST Input Voltage −0.3V to (VDD + 0.
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SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 Accuracy Characteristics VTEMP Analog Temperature Sensor Output Accuracy The limits do not include DC load regulation. The stated accuracy limits are with reference to the values in the SM72480 Conversion Table. Parameter VTEMP Temperature Accuracy (2) Trip Point 125°C or 120°C VTEMP Temperature Accuracy (1) (2) Limits (1) Conditions Trip Point 105°C TA = 20°C to 40°C VDD = 2.3 to 5.5 V ±1.8 TA = 0°C to 70°C VDD = 2.5 to 5.
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SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com Electrical Characteristics (continued) Unless otherwise noted, these specifications apply for +VDD = +1.6V to +5.5V. Boldface limits apply for TA = TJ = TMIN to TMAX ; all other limits TA = TJ = 25°C. Symbol Parameter OVERTEMP DIGITAL OUTPUT Logic "1" Output Leakage Current (3) IOH Typical (1) Conditions Limits (2) Units (Limit) 1 μA (max) ACTIVE LOW, OPEN DRAIN TA = 30 °C 0.001 TA = 150 °C 0.
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SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 Definitions of tEN and tV VDD VDD 1.3V tEN OVERTEMP tVTEMP Valid Enabled VTEMP OVERTEMP Enabled The curves shown represent typical performance under worst-case conditions. Performance improves with larger overhead (VDD − VTEMP), larger VDD, and lower temperatures. The curves shown represent typical performance under worst-case conditions. Performance improves with larger VTEMP, larger VDD and lower temperatures.
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SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com Typical Performance Characteristics VTEMP Output Temperature Error vs. Temperature Minimum Operating Temperature vs. Supply Voltage 120° or 125° C Trip 105° C Trip 0 8 Figure 3. Figure 4. Supply Current vs. Temperature Supply Current vs. Supply Voltage Figure 5. Figure 6. VTEMP Supply-Noise Rejection vs. Frequency Line Regulation VTEMP vs. Supply Voltage Trip Points 120°C Figure 7. Figure 8.
PAGE 9
SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 SM72480 VTEMP VS DIE TEMPERATURE CONVERSION TABLE The SM72480 has a factory-set gain, which is dependent on the Temperature Trip Point. The VTEMP temperature sensor voltage, in millivolts, at each discrete die temperature over the complete operating range is shown in the conversion table below. Table 1. VTEMP Temperature Sensor Output Voltage vs Die Temperature Conversion Table (1) (1) VTEMP, Analog Output Voltage, mV Die Temp.
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SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com Table 1. VTEMP Temperature Sensor Output Voltage vs Die Temperature Conversion Table(1) (continued) 10 VTEMP, Analog Output Voltage, mV Die Temp.
PAGE 11
SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 Table 1. VTEMP Temperature Sensor Output Voltage vs Die Temperature Conversion Table(1) (continued) VTEMP, Analog Output Voltage, mV Die Temp.
PAGE 12
SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com Table 1. VTEMP Temperature Sensor Output Voltage vs Die Temperature Conversion Table(1) (continued) 12 VTEMP, Analog Output Voltage, mV Die Temp.
PAGE 13
SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 Table 1. VTEMP Temperature Sensor Output Voltage vs Die Temperature Conversion Table(1) (continued) VTEMP, Analog Output Voltage, mV Die Temp.
PAGE 14
SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com First-Order Approximation (Linear) over Small Temperature Range For a linear approximation, a line can easily be calculated over the desired temperature range from the Conversion Table using the two-point equation: · ¹ V - V1 = V2 - V1 T2 - T1 · u (T - T1) ¹ (3) Where V is in mV, T is in °C, T1 and V1 are the coordinates of the lowest temperature, T2 and V2 are the coordinates of the highest temperature. V - 2396 mV = (-12.
PAGE 15
SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 1. We see that for VOL of 0.2 V the electrical specification for OVERTEMP shows a maximim isink of 385 µA. 2. Let iL= 1 µA, then iT is about 386 µA max. If we select 35 µA as the current limit then iT for the calculation becomes 35 µA 3. We notice that VDD(Max) is 3.3V + 0.3V = 3.6V and then calculate the pull-up resistor as RPull-up = (3.6 − 0.2)/35 µA = 97k 4.
PAGE 16
SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com VDD SM72480 OPTIONAL BYPASS CAPACITANCE VTEMP RS GND CLOAD > 1100 pF Figure 11. CLOAD Minimum RS 1.1 nF to 99 nF 3 kΩ 100 nF to 999 nF 1.5 kΩ 1 μF 800 Ω VOLTAGE SHIFT The SM72480 is very linear over temperature and supply voltage range. Due to the intrinsic behavior of an NMOS/PMOS rail-to-rail buffer, a slight shift in the output can occur when the supply voltage is ramped over the operating range of the device.
PAGE 17
SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 Table 2. SM72480 Thermal Resistance Device Number Package Number Thermal Resistance (θJA) SM72480SD SDB06A 152° C/W Applications Circuits VDD 4 1 NC 5 Asserts when TDIE > TTRIP 6 SM72480 OVERTEMP NC 3 See text. NC 2 GND Figure 12. Temperature Switch Using Push-Pull Output VDD 4 100k 1 NC SM72480 3 OVERTEMP 6 Asserts when TDIE > TTRIP NC See text. 5 NC 2 GND Figure 13.
PAGE 18
SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com Most CMOS ADCs found in microcontrollers and ASICs have a sampled data comparator input structure. When the ADC charges the sampling cap, it requires instantaneous charge from the output of the analog source such as the SM72480 temperature sensor and many op amps. This requirement is easily accommodated by the addition of a capacitor (CFILTER). The size of CFILTER depends on the size of the sampling capacitor and the sampling frequency.
PAGE 19
SM72480 www.ti.com SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 VDD 100k 4 TRIP TEST 1 RESET Momentary 5 SM72480 6 OVERTEMP NC 3 OVERTEMP 2 GND Figure 17. Latch Circuit using OVERTEMP Output The TRIP TEST pin, normally used to check the operation of the OVERTEMP and OVERTEMP pins, may be used to latch the outputs whenever the temperature exceeds the programmed limit and causes the digital outputs to assert.
PAGE 20
SM72480 SNIS156C – NOVEMBER 2010 – REVISED APRIL 2013 www.ti.com REVISION HISTORY Changes from Revision B (April 2013) to Revision C • 20 Page Changed layout of National Data Sheet to TI format ..........................................................................................................
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PACKAGE OPTION ADDENDUM www.ti.
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PACKAGE OPTION ADDENDUM www.ti.com (3) 11-Apr-2013 MSL, Peak Temp. -- The Moisture Sensitivity Level rating according to the JEDEC industry standard classifications, and peak solder temperature. (4) Multiple Top-Side Markings will be inside parentheses. Only one Top-Side Marking contained in parentheses and separated by a "~" will appear on a device. If a line is indented then it is a continuation of the previous line and the two combined represent the entire Top-Side Marking for that device.
PAGE 23
PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 TAPE AND REEL INFORMATION *All dimensions are nominal Device Package Package Pins Type Drawing SPQ Reel Reel A0 Diameter Width (mm) (mm) W1 (mm) B0 (mm) K0 (mm) P1 (mm) W Pin1 (mm) Quadrant SM72480SD-105/NOPB WSON NGF 6 1000 178.0 12.4 2.8 2.5 1.0 8.0 12.0 Q1 SM72480SD-120/NOPB WSON NGF 6 1000 178.0 12.4 2.8 2.5 1.0 8.0 12.0 Q1 SM72480SD-125/NOPB WSON NGF 6 1000 178.0 12.4 2.8 2.5 1.0 8.0 12.
PAGE 24
PACKAGE MATERIALS INFORMATION www.ti.com 11-Oct-2013 *All dimensions are nominal Device Package Type Package Drawing Pins SPQ Length (mm) Width (mm) Height (mm) SM72480SD-105/NOPB WSON NGF 6 1000 210.0 185.0 35.0 SM72480SD-120/NOPB WSON NGF 6 1000 210.0 185.0 35.0 SM72480SD-125/NOPB WSON NGF 6 1000 210.0 185.0 35.0 SM72480SDE-105/NOPB WSON NGF 6 250 210.0 185.0 35.0 SM72480SDE-120/NOPB WSON NGF 6 250 210.0 185.0 35.
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MECHANICAL DATA NGF0006A www.ti.
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