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Texas Instruments TMP300AIDBVR
- Part No.:
- TMP300AIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
TMP300AIDBVR.pdf
- Description:
- THERMOSTAT PROG ACT LOW SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:2,052
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Product details
Overview
TMP300AIDBVR from Texas Instruments is a resistor-programmable temperature switch and analog-output temperature sensor in SOT-23-6 package, featuring ±1°C typical accuracy at +25°C, 10 mV/°C analog output, programmable trip point via external RSET, 5°C/10°C selectable hysteresis, and open-drain digital output - used for overtemperature protection in DC-DC modules and power-supply systems.
For engineers reviewing the TMP300AIDBVR datasheet, TMP300AIDBVR pinout, TMP300AIDBVR application, or TMP300AIDBVR equivalent, this page delivers verified functional identity, validated pin functions, confirmed thermal performance across –40°C to +125°C, supply voltage range (+1.8 V to +18 V), and real-world design implications of its dual analog/digital output architecture.
Technical Context
The TMP300AIDBVR integrates a precision bandgap-based temperature sensor with a comparator whose trip threshold is set by an external resistor (RSET) connected to the TSET pin; hysteresis is selected digitally via HYSTSET pin logic level (GND = 5°C, V+ = 10°C). Its VTEMP pin provides a high-impedance (210 kΩ), proportional 10 mV/°C analog output usable for calibration or closed-loop compensation.
It operates as a system-level thermal safety element: the open-drain OUT pin drives external circuitry (e.g., enable/disable control of power stages), while the analog output enables real-time temperature monitoring without requiring additional ADC resources - all within 110 μA max quiescent current and down to 1.8 V supply.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Accuracy | ±1°C typical at +25°C - enables reliable trip-point setting without factory calibration in most ambient conditions. |
| Analog Output Sensitivity | 10 mV/°C - allows direct interface with 12-bit ADCs (e.g., 1 LSB ≈ 0.25°C at 3.3 V full-scale) for precise thermal logging. |
| Supply Voltage Range | +1.8 V to +18 V - supports direct integration into wide-input industrial power rails and battery-backed systems. |
| Operating Temperature | –40°C to +125°C - qualified for under-hood automotive auxiliary circuits and industrial motor drive thermal monitoring. |
| Quiescent Current | 110 μA maximum - ensures minimal impact on standby power in always-on thermal supervision nodes. |
| Hysteresis Options | 5°C (HYSTSET = GND) or 10°C (HYSTSET = V+) - prevents chatter during slow thermal transients in fan control or shutdown sequencing. |
| Digital Output Type | Open-drain - permits wired-OR configuration with other fault signals and flexible pull-up voltage selection (up to 18 V). |
Pinout & Package
SOT-23-6 (DBV) package: 2.90 mm × 1.60 mm body, 1.45 mm max height, JEDEC MO-178 compliant, tape-and-reel (3000 pcs/reel), MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TSET (Pin 1) | Resistor-programmed threshold input | Connects to RSET to generate trip voltage; value sets trip point per RSET = 10(50 + TC)/3 kΩ (TC in °C). |
| GND (Pin 2) | Reference ground | Common return for analog and digital sections; must be low-impedance to avoid trip-point drift. |
| OUT (Pin 3) | Digital trip output | Open-drain output active-low when temperature exceeds trip point; sinks up to 5 mA. |
| HYSTSET (Pin 4) | Hysteresis configuration input | Logic-low (GND) selects 5°C hysteresis; logic-high (V+) selects 10°C - no external components required. |
| VTEMP (Pin 5) | Analog temperature output | High-impedance (210 kΩ) 10 mV/°C output; requires buffering if loaded >10 kΩ to preserve accuracy. |
| V+ (Pin 6) | Power supply input | Accepts 1.8–18 V; powers internal circuitry and serves as pull-up reference for HYSTSET logic detection. |
Key Features
| Feature | Design Value |
|---|---|
| Resistor-programmable trip point | Enables field-adjustable thermal thresholds without firmware changes or reprogramming - ideal for variant management across product families. |
| Dual-mode output (digital + analog) | Eliminates need for separate temperature monitor ICs: OUT handles safety-critical shutdown, VTEMP supports diagnostics and compensation loops. |
| Low 110 μA quiescent current | Permits continuous thermal supervision in energy-constrained applications like battery-powered IoT gateways or always-on PMICs. |
| Wide 1.8–18 V supply range | Supports direct connection to unregulated intermediate rails (e.g., post-rectifier, pre-LDO) without external regulators. |
| Factory-trimmed accuracy | ±1°C typical error at +25°C is achieved via on-die trimming - removes need for system-level calibration in cost-sensitive designs. |
Applications
| Power-Supply Thermal Protection | DC-DC Module Monitoring |
|---|---|
Use Scenario: Monitoring MOSFET junction temperature in isolated flyback converters to prevent thermal runaway during overload. IC Role / Device Role / Timing Role: TMP300AIDBVR acts as autonomous overtemperature cutoff - triggers immediate disable of PWM controller via open-drain OUT signal. Use Value: Prevents catastrophic failure without MCU intervention; hysteresis avoids oscillation during thermal recovery. | Use Scenario: Detecting abnormal heating in compact 12 V → 3.3 V buck modules used in network switches. IC Role / Device Role / Timing Role: TMP300AIDBVR provides both fault signaling (OUT) and real-time temperature telemetry (VTEMP) to host processor for predictive maintenance. Use Value: Enables dynamic derating before thermal throttling occurs - extends module lifetime and improves system uptime. |
| Electronic Protection Systems | Thermal Management in Industrial PLCs |
Use Scenario: Safeguarding IGBT gate drivers in motor control inverters against excessive heatsink temperature. IC Role / Device Role / Timing Role: TMP300AIDBVR's V+ pin accepts up to 18 V, allowing direct interface with driver supply rail; OUT asserts fault to isolation barrier. Use Value: Reduces BOM count by eliminating level-shifting components while maintaining functional safety integrity. | Use Scenario: Monitoring CPU and FPGA die temperatures inside sealed industrial programmable logic controllers. IC Role / Device Role / Timing Role: TMP300AIDBVR's SC70/SOT-23 footprint minimizes PCB area; analog output feeds local ADC for thermal profiling logs. Use Value: Supports compliance with IEC 61131-2 thermal derating requirements using single-component solution. |
Equivalent & Alternatives
The following parts are listed as comparable options for similar temperature switch and analog sensor applications.
| Alternative Part | Technical Difference | Application Difference | Selection Advice |
|---|---|---|---|
| TMP300BIDBVR | Higher trip accuracy (±2°C min, ±4°C max vs. ±2°C/±4°C for TMP300); same pinout, package, and electrical interface. | Preferred where tighter trip tolerance is required across full –40°C to +125°C range, e.g., medical power supplies. | Select TMP300BIDBVR when datasheet-specified worst-case trip error must remain ≤ ±4°C over temperature. |
| TMP235AIDBVR | Analog-only output (no digital trip), higher accuracy (±0.5°C typ), no hysteresis or RSET programming - fixed 10 mV/°C output only. | Suitable for precision temperature measurement only; lacks autonomous shutdown capability. | Choose TMP235AIDBVR only when digital fault signaling is unnecessary and measurement accuracy is prioritized over protection functionality. |
Compared with TMP300BIDBVR, the TMP300AIDBVR offers identical packaging and interface but relaxed trip accuracy specs - making it optimal for cost-sensitive thermal cutoffs where ±4°C worst-case error is acceptable. Versus TMP235AIDBVR, TMP300AIDBVR adds critical safety functionality (programmable trip + hysteresis) at minor accuracy trade-off.
Availability
TMP300AIDBVR is available at Aetrix Electronics and suitable for power-supply systems, DC-DC modules, and electronic protection systems requiring stable component supply with long-term manufacturability assurance.
Supply support for TMP300AIDBVR 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 leader specializing in analog, embedded processing, and connectivity technologies, with decades of expertise in precision sensing and power management ICs.
The TMP300 series was designed specifically for cost-effective, resistor-configurable thermal protection in space-constrained power electronics - balancing accuracy, low power, and dual analog/digital output flexibility.
FAQ
What is the function of the HYSTSET pin on the TMP300AIDBVR?
The HYSTSET pin on the TMP300AIDBVR selects hysteresis magnitude: connecting it to GND configures 5°C hysteresis, while connecting it to V+ selects 10°C. This prevents output oscillation during slow thermal transitions. The pin has CMOS-compatible thresholds (0.4 V low, V+ – 0.4 V high), and no external pull-up/down is needed - the TMP300AIDBVR internally detects the logic level.
Can the TMP300AIDBVR operate from a 1.8-V supply?
Yes, the TMP300AIDBVR operates from +1.8 V to +18 V. At 1.8 V, its functional temperature range is –40°C to 100 × (VS – 0.95) = +85°C, and analog output remains accurate. Full –40°C to +125°C operation requires ≥2.35 V supply. The TMP300AIDBVR maintains 110 μA max quiescent current across this entire voltage range.
How is the trip temperature set on the TMP300AIDBVR?
The trip temperature on the TMP300AIDBVR is set by an external resistor (RSET) connected between TSET (Pin 1) and GND. The formula is RSET = 10(50 + TC)/3 kΩ, where TC is the desired trip point in °C. For example, a 100°C trip requires RSET ≈ 500 kΩ. The TMP300AIDBVR uses internal 3-μA bias current to develop the threshold voltage at TSET.
What is the purpose of the VTEMP pin on the TMP300AIDBVR?
The VTEMP pin on the TMP300AIDBVR provides a high-impedance (210 kΩ) analog output proportional to temperature at 10 mV/°C. It can serve as a test point for validation, feed a microcontroller ADC for thermal logging, or inject simulated temperature signals to verify system fault response - all without loading the sensor core. Buffering is recommended if driving loads <100 kΩ.
Is the TMP300AIDBVR pin-compatible with other variants in the TMP300 family?
Yes, the TMP300AIDBVR is pin-compatible with all SOT-23-6 variants in the TMP300 family, including TMP300BIDBVR and TMP300AIDCKR (SC70-6). Pin functions (TSET, GND, OUT, HYSTSET, VTEMP, V+) and electrical behavior are identical across grades and packages. Differences are limited to accuracy specs, temperature range limits at low supply voltages, and lifecycle status - not pinout or interface.
TMP300AIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Not For New Designs
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- Programmable
- Accuracy:
- ±4°C
- Current - Output (Max):
- -
- Output Type:
- Open Drain
- Output:
- Active Low
- Output Function:
- /OverTemp, VTemp
- Selectable Hysteresis:
- Yes
- Features:
- Trip Test
- Voltage - Supply:
- 1.8 V ~ 18 V
- Current - Supply:
- 110µA
- Operating Temperature:
- -40°C ~ 150°C
- Mounting Type:
- Surface Mount
- Grade:
- -
- Qualification:
- -
- Supplier Device Package:
- SOT-23-6
TMP300AIDBVR FAQ
1.How can I place an order for TMP300AIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP300AIDBVR 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 TMP300AIDBVR reliable?
The price and inventory of TMP300AIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP300AIDBVR is usually 5 days.
3.What payment methods are accepted for TMP300AIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP300AIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP300AIDBVR?
TMP300AIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP300AIDBVR 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 TMP300AIDBVR?
For technical support, including TMP300AIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP300AIDBVR requirements.
6.How does Aetrix verify that TMP300AIDBVR is sourced from the original manufacturer or authorized distributors?
All TMP300AIDBVR 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 TMP300AIDBVR meets industry standards.
7.What is the process for return or replacement of TMP300AIDBVR?
All TMP300AIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TMP300AIDBVR, 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 TMP300AIDBVR part is unused and in its original packaging.
Return procedure for TMP300AIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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