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Texas Instruments TMP302ADRLR
- Part No.:
- TMP302ADRLR
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TMP302ADRLR.pdf
- Description:
- THERMOSTAT ACT LOW OPEN DRN 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:2,425
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Product details
Overview
TMP302ADRLR from Texas Instruments is a low-power, pin-configurable temperature switch in SOT-563 (DRL) package, delivering ±0.2°C typical trip-point accuracy from +40°C to +125°C, 15 μA maximum quiescent current, and open-drain active-low output - used for overtemperature protection in space-constrained DC-DC modules and portable electronics.
For engineers reviewing the TMP302ADRLR datasheet, TMP302ADRLR pinout, TMP302ADRLR application, or TMP302ADRLR equivalent, key selection criteria include its 6-pin SOT-563 footprint, selectable 50/55/60/65°C trip points via TRIPSET0/TRIPSET1, 5°C/10°C hysteresis via HYSTSET, 1.4–3.6 V supply range, and direct integration without microcontroller dependency.
Technical Context
The TMP302ADRLR implements an analog temperature sensor core feeding a comparator with digitally selectable thresholds and hysteresis. Trip point is set by two digital inputs (TRIPSET0/TRIPSET1), each tied to GND or VS, selecting one of four factory-trimmed thresholds (50°C, 55°C, 60°C, or 65°C). Hysteresis is independently configured via HYSTSET (GND = 5°C, VS = 10°C), preventing output oscillation near threshold.
Its open-drain OUT pin requires an external pullup resistor (10–100 kΩ) and operates across 1.4–3.6 V supply, consuming only 8–15 μA over –40°C to +125°C. No calibration, external components beyond bypass capacitor and pullup, or firmware support is needed - enabling autonomous thermal alerting in power-sensitive systems.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage | 1.4 V to 3.6 V - supports single-cell Li-ion, coin cell, and low-voltage logic rails without level-shifting. |
| Quiescent Current | 8–15 μA - enables multi-year battery life in always-on thermal monitoring applications. |
| Tripping Accuracy | ±0.2°C (typical) from +40°C to +125°C - ensures precise overtemperature response without system-level calibration. |
| Selectable Trip Points | 50°C, 55°C, 60°C, 65°C - selected via TRIPSET0/TRIPSET1 logic states; no programming interface required. |
| Hysteresis Options | 5°C (HYSTSET = GND) or 10°C (HYSTSET = VS) - prevents chatter during slow thermal transients. |
| Output Type | Open-drain, active-low - compatible with 1.4–3.6 V logic domains and allows wired-OR fault signaling. |
| Operating Temp Range | –40°C to +125°C - qualified for industrial and extended-temperature embedded environments. |
Pinout & Package
SOT-563 (DRL) package: 1.6 mm × 1.6 mm × 0.6 mm, 6-pin micropackage with exposed pad for thermal coupling; RoHS-compliant, MSL Level-1, tape-and-reel (4000 pcs/reel).
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - TRIPSET0 | Digital input | LSB of trip-point selection; GND/VS state pairs with TRIPSET1 to configure 50/55/60/65°C threshold. |
| 2 - GND | Ground reference | Primary return path for internal circuitry and external pullup; must be low-impedance for accuracy. |
| 3 - OUT | Digital output | Open-drain, active-low alert signal; requires external pullup (10–100 kΩ) to VS for proper logic high. |
| 4 - HYSTSET | Digital input | Selects hysteresis: GND = 5°C, VS = 10°C - determines temperature delta before output reasserts high. |
| 5 - VS | Power supply | Single 1.4–3.6 V supply input; bypass capacitor (0.1 µF) required adjacent to pin for noise immunity. |
| 6 - TRIPSET1 | Digital input | MSB of trip-point selection; combined with TRIPSET0 to define exact trip temperature per datasheet table. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable trip points | Four factory-trimmed thresholds (50/55/60/65°C) set statically via two logic inputs - eliminates firmware or I²C configuration overhead. |
| Configurable hysteresis | 5°C or 10°C window selected by single HYSTSET pin - avoids false triggering during marginal thermal excursions. |
| Ultra-low quiescent current | Max 15 μA across full temperature range - enables use in energy-harvesting and battery-backed systems where sleep current dominates lifetime. |
| Self-contained operation | No external components beyond 0.1 µF bypass cap and pullup resistor - reduces BOM count and layout complexity vs. ADC-based solutions. |
| Wide supply voltage range | Operates from 1.4 V (coin cell) to 3.6 V (Li-ion max) - supports diverse power architectures without regulators or LDOs. |
Applications
| Cell Phone Thermal Protection | DC-DC Module Overtemperature Shutdown |
|---|---|
Use Scenario: Monitors baseband processor die temperature during sustained RF transmission or video encoding. IC Role / Device Role / Timing Role: Autonomous temperature switch asserting active-low interrupt to PMIC when local junction exceeds 60°C. Use Value: Prevents thermal throttling-induced performance collapse by triggering early-stage power reduction before silicon damage occurs. | Use Scenario: Embedded in compact 12 V-to-3.3 V buck converter for FPGA power rail, detecting MOSFET or inductor overheating. IC Role / Device Role / Timing Role: Directly disables enable pin of controller IC via open-drain output when PCB hotspot reaches 55°C. Use Value: Eliminates need for microcontroller polling or analog sensing chain - cuts response latency to <100 ms and reduces component count by 3+ parts. |
| Server Fan Speed Control Trigger | Portable Media Player Battery Safety |
Use Scenario: Mounted on CPU VRM heatsink to initiate fan ramp-up before thermal throttling begins. IC Role / Device Role / Timing Role: Temperature switch driving optocoupler input to increase PWM duty cycle on 4-wire fan controller. Use Value: Provides deterministic, repeatable 50°C activation point with ±0.2°C tolerance - improves acoustic profile vs. software-based thermal algorithms. | Use Scenario: Integrated into lithium-polymer battery pack PCB to halt charging if cell temperature exceeds safe limit during fast-charge cycles. IC Role / Device Role / Timing Role: Standalone overtemperature cutoff device asserting fault signal to charger IC when battery surface hits 65°C. Use Value: Meets IEC 62133 safety requirements with zero firmware dependency - removes single point of failure in battery management architecture. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| MAX6512UTP+T | Fixed 50°C trip point; no pin-selectable hysteresis; 3.6 V max supply; ±2°C accuracy over –40°C to +125°C. | Lacks configurable thresholds/hysteresis - suitable only for fixed-threshold designs requiring lower cost, not flexibility. | Choose MAX6512UTP+T when trip point is invariant and ±2°C tolerance is acceptable; avoid if hysteresis tuning or multiple thresholds are needed. |
| LM75BIMMX/NOPB | I²C digital temperature sensor + thermostat; 9-bit resolution; ±2°C accuracy; 2.7–5.5 V supply; requires MCU interface and firmware. | Provides programmable thresholds via register writes but adds software complexity and power overhead (~250 μA active). | Choose LM75BIMMX/NOPB only when dynamic threshold adjustment or temperature telemetry is required - not for simple, autonomous switching. |
Compared with MAX6512UTP+T and LM75BIMMX/NOPB, the TMP302ADRLR uniquely delivers pin-selectable trip points and hysteresis with ultra-low power and zero firmware dependency - making it optimal for cost-sensitive, space-constrained, and battery-powered thermal cutoff applications where simplicity and precision are critical.
Availability
TMP302ADRLR is available at Aetrix Electronics and suitable for DC-DC modules, portable media players, and server thermal monitoring requiring stable component supply, long-term manufacturability, and automotive-grade reliability assurance.
Supply support for TMP302ADRLR includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.
Manufacturer
Texas Instruments is a global semiconductor company designing analog ICs, embedded processors, and connectivity solutions for industrial, automotive, and consumer markets.
The TMP302ADRLR belongs to TI's precision analog temperature sensing portfolio, engineered specifically for autonomous, low-power thermal protection in compact electronics where size, accuracy, and self-sufficiency are design priorities.
FAQ
What is the exact trip-point temperature range supported by TMP302ADRLR?
The TMP302ADRLR supports four discrete, factory-trimmed trip points: 50°C, 55°C, 60°C, and 65°C. These are selected exclusively via logic states applied to TRIPSET0 and TRIPSET1 pins (GND or VS), as defined in Table 1 of the SBOS488E datasheet. No other trip temperatures are supported by the TMP302ADRLR variant.
Does TMP302ADRLR require a microcontroller to operate?
No, the TMP302ADRLR operates autonomously without any microcontroller or firmware. It functions as a standalone temperature switch: trip point and hysteresis are set by hardwiring TRIPSET0, TRIPSET1, and HYSTSET to GND or VS; output is open-drain active-low and requires only an external pullup resistor. The TMP302ADRLR needs no communication interface, clock, or initialization sequence.
What is the minimum pullup resistor value recommended for TMP302ADRLR's OUT pin?
The recommended pullup resistor range for TMP302ADRLR's OUT pin is 10 kΩ to 100 kΩ connected to VS. A 10 kΩ value ensures robust logic-high voltage under worst-case load (IOL = 3 mA), while higher values (e.g., 100 kΩ) reduce quiescent current further - critical for battery-operated systems. Values below 10 kΩ risk exceeding VOL specification under load.
Can TMP302ADRLR be used in automotive applications?
The standard TMP302ADRLR is not AEC-Q200 qualified. For automotive use, TI offers the TMP302-Q1 variant, which is qualified to AEC-Q200 Grade 1 (–40°C to +125°C) and undergoes additional reliability testing. The TMP302ADRLR itself is rated for industrial temperature range (–40°C to +125°C) but lacks automotive-specific qualification documentation and screening.
How does hysteresis work on TMP302ADRLR, and how is it configured?
Hysteresis on TMP302ADRLR prevents output oscillation near the trip point by defining a temperature window between turn-on and turn-off. It is configured solely via the HYSTSET pin: connecting HYSTSET to GND selects 5°C hysteresis, while connecting it to VS selects 10°C. For example, with a 60°C trip point and HYSTSET = VS, OUT goes low at 60°C and returns high only when temperature falls to 50°C - a behavior fully implemented within the TMP302ADRLR's analog core.
TMP302ADRLR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 50°C, 55°C, 60°C, 65°C
- Accuracy:
- ±2°C
- Current - Output (Max):
- 10mA
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp
- Selectable Hysteresis:
- Yes
- Features:
- Selectable Trip Point
- Voltage - Supply:
- 1.4 V ~ 3.6 V
- Current - Supply:
- 8µA
- Operating Temperature:
- -40°C ~ 125°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-5X3
TMP302ADRLR FAQ
1.How can I place an order for TMP302ADRLR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP302ADRLR on Aetrix. Our sales agent will provide a competitive quotation and guide you through the order confirmation once you accept the terms.
2.Are the price and stock information for TMP302ADRLR reliable?
The price and inventory of TMP302ADRLR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP302ADRLR is usually 5 days.
3.What payment methods are accepted for TMP302ADRLR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP302ADRLR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP302ADRLR?
TMP302ADRLR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP302ADRLR order is processed, you will receive an email with the shipment details and tracking number.
Note: Tracking information may take up to 24 hours to appear. Express delivery typically takes 3–5 business days.
5.How can I obtain technical support or documentation for TMP302ADRLR?
For technical support, including TMP302ADRLR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP302ADRLR requirements.
6.How does Aetrix verify that TMP302ADRLR is sourced from the original manufacturer or authorized distributors?
All TMP302ADRLR products on Aetrix are procured from qualified distributors and authorized channels. Our dedicated quality assurance team conducts strict verification, including traceability checks and, if necessary, third-party testing. This ensures that TMP302ADRLR meets industry standards.
7.What is the process for return or replacement of TMP302ADRLR?
All TMP302ADRLR units undergo pre-shipment inspection (PSI). If there is an issue with TMP302ADRLR, returns or replacements are accepted under the following conditions:
1.Quantity discrepancies, incorrect items, or visible external defects (such as breakage or corrosion), acknowledged by Aetrix.
2.The issue is reported within 90 days of delivery.
3.The TMP302ADRLR part is unused and in its original packaging.
Return procedure for TMP302ADRLR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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