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Texas Instruments TMP302DDRLT
- Part No.:
- TMP302DDRLT
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SOT-563, SOT-666
- Datasheet:
-
TMP302DDRLT.pdf
- Description:
- THERMOSTAT ACT LOW OPEN DRN 6SOT
- Quantity:
- Payment:
- Shipping:
Inventory:3,041
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Product details
Overview
TMP302DDRLT from Texas Instruments is a micropackage temperature switch (SOT-563) with pin-selectable trip points (110°C, 115°C, 120°C, or 125°C), ±0.2°C typical trip accuracy from +40°C to +125°C, and open-drain active-low output - used for overtemperature protection in DC-DC modules and power-supply systems.
For engineers reviewing the TMP302DDRLT datasheet, TMP302DDRLT pinout, TMP302DDRLT application, or TMP302DDRLT equivalent, key selection considerations include trip-point programmability via TRIPSET0/TRIPSET1 pins, 5°C/10°C hysteresis selection via HYSTSET, 1.4 V to 3.6 V supply operation, 15 μA max quiescent current, and SOT-563 package compatibility with space-constrained thermal monitoring designs.
Technical Context
The TMP302DDRLT implements a fully integrated bandgap-based temperature sensor, comparator, and digital logic block - requiring no external components beyond a pullup resistor and bypass capacitor. Its trip threshold is set by two digital inputs (TRIPSET0/TRIPSET1) tied to GND or VS, selecting one of four factory-programmed thresholds specific to the TMP302D variant.
Hysteresis is controlled solely by the HYSTSET pin: grounded for 5°C, connected to VS for 10°C. The open-drain OUT pin asserts low when temperature reaches or exceeds the selected trip point and remains low until temperature falls below (trip point – hysteresis), eliminating oscillation near threshold.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | 1.4 V to 3.6 V - supports direct interface with low-voltage microcontrollers and battery-powered systems without level-shifting. |
| Max Quiescent Current | 15 μA - enables always-on thermal monitoring in energy-sensitive applications like portable media players. |
| Tripping Accuracy | ±0.2°C (typical) from +40°C to +125°C - ensures precise overtemperature detection critical for server CPU thermal throttling. |
| Selectable Trip Points | 110°C, 115°C, 120°C, 125°C - fixed per TMP302D variant; configured via TRIPSET0/TRIPSET1 voltage states (GND/VS). |
| Hysteresis Options | 5°C (HYSTSET = GND) or 10°C (HYSTSET = VS) - prevents output chatter during slow thermal transients in power converters. |
| Output Type | Open-drain, active-low - allows wired-OR configuration with other fault signals and flexible pullup to any compatible rail up to 4 V. |
| Operating Temp Range | –40°C to +125°C - qualified for industrial and extended-temperature embedded power systems. |
Pinout & Package
SOT-563 (DRL) package: 1.6 mm × 1.6 mm × 0.6 mm, 6-pin micropackage with exposed pad for thermal coupling.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| 1 - TRIPSET0 | Digital input | Combines with TRIPSET1 to select one of four trip points (110°C–125°C); must be tied to GND or VS. |
| 2 - GND | Ground reference | System ground connection; required for internal biasing and temperature sensing reference. |
| 3 - OUT | Digital output | Open-drain, active-low alert signal; requires external pullup (10 kΩ–100 kΩ) to VS or another logic rail. |
| 4 - HYSTSET | Digital input | Selects hysteresis: GND = 5°C, VS = 10°C; determines return temperature after trip event. |
| 5 - VS | Power supply | Single supply input (1.4 V–3.6 V); powers internal sensor, comparator, and logic; bypass capacitor required. |
| 6 - TRIPSET1 | Digital input | Combines with TRIPSET0 to select one of four trip points (110°C–125°C); must be tied to GND or VS. |
Key Features
| Feature | Design Value |
|---|---|
| Pin-selectable trip points | Four discrete thresholds (110°C/115°C/120°C/125°C) set by static logic levels on TRIPSET0/TRIPSET1 - no firmware or I²C needed. |
| Configurable hysteresis | 5°C or 10°C window selected via single HYSTSET pin - eliminates need for external RC networks or comparator feedback. |
| Ultra-low power operation | 15 μA maximum supply current - enables continuous thermal monitoring in always-on battery-backed systems. |
| Self-contained functionality | No external components required beyond 0.1 µF bypass cap and pullup resistor - reduces BOM count and layout complexity. |
| Wide supply range | Operates from 1.4 V to 3.6 V - compatible with Li-ion, coin-cell, and multi-rail embedded power architectures. |
Applications
| Cell Phone Handsets | DC-DC Modules |
|---|---|
Use Scenario: Real-time battery and SoC thermal protection during fast charging or sustained compute load. IC Role / Device Role / Timing Role: Standalone overtemperature switch triggering system shutdown or throttling before thermal damage occurs. Use Value: Prevents lithium-ion battery thermal runaway using ±0.2°C accuracy at 125°C trip point without MCU intervention. | Use Scenario: Monitoring MOSFET junction temperature in high-efficiency buck converters powering FPGAs or ASICs. IC Role / Device Role / Timing Role: Direct thermal fault detector asserting low on OUT to disable PWM controller or enable backup cooling. Use Value: Enables immediate hardware-level response to MOSFET overheating, avoiding software latency and ensuring robust power stage protection. |
| Servers | Power-Supply Systems |
Use Scenario: CPU/GPU VRM thermal monitoring in rack-mounted servers with strict fan control and shutdown policies. IC Role / Device Role / Timing Role: Dedicated trip-point sensor feeding fault signal into baseboard management controller (BMC) or PMBus interface. Use Value: Provides deterministic, low-latency thermal alert at 110°C–125°C with 5°C hysteresis to prevent repeated cycling during thermal transients. | Use Scenario: Overtemperature safeguard in AC-DC adapters and industrial power supplies with wide ambient operating ranges. IC Role / Device Role / Timing Role: Independent thermal cutoff device placed near transformer or rectifier stack to halt output before insulation failure. Use Value: Delivers fail-safe protection with 1.4 V minimum supply support - operational even during brownout conditions where MCU may be unresponsive. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP302BDRLR | Fixed trip points: 70°C, 75°C, 80°C, 85°C - lower threshold range; identical SOT-563 package and pinout. | Targeted at consumer electronics with lower thermal limits (e.g., portable media players), not high-temp power stages. | Select TMP302BDRLR only if application requires sub-90°C trip thresholds and same footprint. |
| TMP302CDRLR | Fixed trip points: 90°C, 95°C, 100°C, 105°C - mid-range thresholds; identical electrical specs and package. | Suitable for thermal management in laptops and industrial controllers where 105°C is the maximum safe operating limit. | Choose TMP302CDRLR when 105°C is the design-critical trip point and 110°C+ is excessive. |
Compared with TMP302BDRLR and TMP302CDRLR, the TMP302DDRLT provides the highest factory-programmed trip points (110°C–125°C), making it uniquely suited for high-power density applications such as server VRMs and high-current DC-DC modules where thermal margins are tight and failure consequences severe.
Availability
TMP302DDRLT is available at Aetrix Electronics and suitable for DC-DC modules, power-supply systems, and server thermal monitoring requiring stable component supply across extended product lifecycles.
Supply support for TMP302DDRLT 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 specializing in analog and embedded processing technologies, with leadership in precision analog, power management, and sensor solutions.
The TMP302 family was designed specifically for ultra-low-power, pin-configurable thermal protection in space-constrained electronics - targeting applications where MCU-based monitoring adds cost, latency, or power overhead.
FAQ
What is the exact trip-point range supported by the TMP302DDRLT?
The TMP302DDRLT supports four factory-programmed trip points: 110°C, 115°C, 120°C, and 125°C. These values are fixed for the TMP302D variant and selected exclusively via voltage states on the TRIPSET0 and TRIPSET1 pins (GND or VS). No other trip temperatures are available for the TMP302DDRLT, and the device does not support user-programmable or analog-adjustable thresholds.
Does the TMP302DDRLT require external components to operate?
Yes, the TMP302DDRLT requires two external passive components: a 0.1 µF ceramic bypass capacitor between VS and GND (placed as close as possible to the device), and a pullup resistor (10 kΩ to 100 kΩ) from the OUT pin to VS or another compatible logic rail. These components ensure stable power delivery and proper open-drain output logic levels - no additional ICs, resistors for threshold setting, or calibration circuitry are needed.
How is hysteresis configured on the TMP302DDRLT?
Hysteresis on the TMP302DDRLT is configured solely via the HYSTSET pin: connecting HYSTSET to GND selects 5°C hysteresis, while connecting it to VS selects 10°C hysteresis. This setting determines the temperature drop required before the OUT pin returns high after a trip event. For example, with a 120°C trip point and HYSTSET = VS, OUT remains low until temperature falls to 110°C.
Is the TMP302DDRLT pin-compatible with other TMP302 variants?
Yes, the TMP302DDRLT is fully pin-compatible with all TMP302x variants (TMP302A/B/C/D) in the SOT-563 (DRL) package. Pin numbering, functions (TRIPSET0, TRIPSET1, GND, OUT, VS, HYSTSET), and electrical characteristics (supply range, quiescent current, output drive) are identical across variants - only the factory-programmed trip-point values differ.
What is the recommended pullup resistor value for the TMP302DDRLT OUT pin?
The recommended pullup resistor value for the TMP302DDRLT OUT pin is 10 kΩ connected between OUT and VS. Values from 10 kΩ to 100 kΩ are acceptable per datasheet specifications; higher values reduce power consumption but increase rise time, while lower values improve speed at the cost of increased static current. For most applications, 10 kΩ provides optimal balance of response time and efficiency.
TMP302DDRLT Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-563, SOT-666
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Obsolete
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- 110°C, 115°C, 120°C, 125°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
TMP302DDRLT FAQ
1.How can I place an order for TMP302DDRLT through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP302DDRLT 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 TMP302DDRLT reliable?
The price and inventory of TMP302DDRLT are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP302DDRLT is usually 5 days.
3.What payment methods are accepted for TMP302DDRLT?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP302DDRLT transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP302DDRLT?
TMP302DDRLT orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP302DDRLT 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 TMP302DDRLT?
For technical support, including TMP302DDRLT datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP302DDRLT requirements.
6.How does Aetrix verify that TMP302DDRLT is sourced from the original manufacturer or authorized distributors?
All TMP302DDRLT 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 TMP302DDRLT meets industry standards.
7.What is the process for return or replacement of TMP302DDRLT?
All TMP302DDRLT units undergo pre-shipment inspection (PSI). If there is an issue with TMP302DDRLT, 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 TMP302DDRLT part is unused and in its original packaging.
Return procedure for TMP302DDRLT:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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