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Texas Instruments TMP300BIDBVR
- Part No.:
- TMP300BIDBVR
- Manufacturer:
- Texas Instruments
- Category:
- Thermostats - Solid State
- Package:
- SOT-23-6
- Datasheet:
-
TMP300BIDBVR.pdf
- Description:
- THERMOSTAT PROG ACT LOW SOT23-6
- Quantity:
- Payment:
- Shipping:
Inventory:3,100
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Product details
Overview
TMP300BIDBVR from Texas Instruments is a resistor-programmable temperature switch and analog-output temperature sensor in SOT-23-6 package, featuring ±2°C trip accuracy (–40°C to +125°C), 10 mV/°C analog output, programmable 5°C/10°C hysteresis, open-drain digital output, and 110 μA max quiescent current. It serves as thermal protection and sensing element in DC-DC modules and power-supply systems.
For engineers reviewing the TMP300BIDBVR datasheet, TMP300BIDBVR pinout, TMP300BIDBVR application, or TMP300BIDBVR equivalent, key selection criteria include resistor-programmable trip point, dual hysteresis configuration, analog output usability for calibration/testing, low-voltage operation down to 1.8 V, and SOT-23-6 thermal performance with θJA = 180°C/W.
Technical Context
The TMP300BIDBVR integrates a precision bandgap-based temperature sensor core with a comparator whose threshold is set externally via RSET on the TSET pin. Its analog output (VTEMP) provides a high-impedance 10 mV/°C voltage proportional to die temperature, usable for system-level monitoring or closed-loop compensation.
Hysteresis is selected digitally by pulling HYSTSET to GND (5°C) or V+ (10°C); the open-drain OUT pin asserts low when temperature exceeds the programmed trip point. The device operates across 1.8 V to 18 V supply, with functional range extended to –50°C at 1.8 V, and supports bypass capacitor filtering on TSET and VTEMP to suppress noise-induced false triggering.
Key Specifications
| Parameter | Value and Actual Design Meaning |
|---|---|
| Supply Voltage Range | +1.8 V to +18 V - enables direct integration into low-voltage microcontroller rails and high-voltage industrial supplies without level-shifting. |
| Temperature Accuracy (Trip) | ±2°C (min/max over –40°C to +125°C) - ensures reliable overtemperature shutdown in safety-critical power stages. |
| Analog Output Sensitivity | 10 mV/°C - delivers linear, factory-trimmed voltage output for accurate ambient or junction temperature measurement. |
| Hysteresis Options | 5°C (HYSTSET = GND) or 10°C (HYSTSET = V+) - prevents output chatter during slow thermal transitions near trip point. |
| Quiescent Current | 110 μA maximum - minimizes standby power in battery-backed or energy-constrained thermal monitoring circuits. |
| Package Thermal Resistance | θJA = 180°C/W (SOT-23-6) - supports stable operation under sustained thermal load in compact PCB layouts. |
| Operating Temperature Range | –40°C to +125°C (full specification); functional to +150°C - suitable for automotive under-hood and industrial motor control environments. |
Pinout & Package
SOT-23-6 package (DBV), 2.90 mm × 1.60 mm body size, 1.45 mm max height, JEDEC MO-178 compliant, RoHS-compliant NIPDAU lead finish, MSL Level-1.
| Pin/Terminal | Circuit Role | Design Meaning |
|---|---|---|
| TSET (Pin 1) | Input | Resistor-programmable trip threshold node; connects to RSET to define temperature setpoint per RSET = 10(50 + TSET)/3 kΩ. |
| GND (Pin 2) | Power Reference | System ground return for internal circuitry and comparator reference; must be low-impedance for accuracy. |
| OUT (Pin 3) | Output | Open-drain digital output; sinks current when temperature exceeds trip point; requires external pull-up for logic-high state. |
| HYSTSET (Pin 4) | Input | Hysteresis select input; grounded for 5°C hysteresis, tied to V+ for 10°C hysteresis - no external resistor needed. |
| VTEMP (Pin 5) | Output | Analog temperature output (10 mV/°C, 210 kΩ source impedance); used for calibration, testing, or feedback loops; must be buffered if loaded. |
| V+ (Pin 6) | Power Input | Positive supply input; powers internal circuitry and defines logic high for HYSTSET; accepts 1.8–18 V with no regulation required. |
Key Features
| Feature | Design Value |
|---|---|
| Resistor-programmable trip point | Enables precise, field-adjustable thermal thresholds without firmware or DAC - simplifies BOM and reduces design iteration time. |
| Dual hysteresis selection (5°C / 10°C) | Eliminates need for external hysteresis components; configurable via single connection, reducing layout complexity and component count. |
| High-impedance analog output (210 kΩ) | Allows direct connection to ADC inputs or test equipment without loading error; supports in-system calibration and thermal loop diagnostics. |
| Low 110 μA quiescent current | Extends battery life in portable thermal monitors and enables always-on sensing in energy-sensitive applications like IoT edge nodes. |
| 1.8-V minimum supply operation | Permits direct interface with modern ultra-low-voltage MCUs and PMICs, avoiding dedicated LDOs for sensor biasing. |
Applications
| Power-Supply Overtemperature Protection | DC-DC Module Thermal Monitoring |
|---|---|
|
Use Scenario: Monitors heatsink or MOSFET junction temperature in isolated DC-DC converters to prevent thermal runaway during overload or poor airflow. IC Role / Device Role / Timing Role: Digital temperature switch asserting fault signal to enable/disable PWM controller or trigger system reset. Use Value: Prevents irreversible damage by initiating shutdown before critical silicon temperature is reached, leveraging ±2°C trip accuracy and 5°C hysteresis. |
Use Scenario: Embedded in telecom or server DC-DC modules to track internal temperature rise during dynamic load transients. IC Role / Device Role / Timing Role: Analog output (VTEMP) feeds back to host MCU for real-time thermal derating; digital OUT triggers hard cutoff at preset limit. Use Value: Enables adaptive power management using 10 mV/°C analog output while maintaining fail-safe digital protection with programmable hysteresis. |
| Electronic Protection Systems | Thermal Management in Industrial Controllers |
|
Use Scenario: Used in motor drive inverters or battery management systems to detect overtemperature conditions in IGBT gate drivers or cell stacks. IC Role / Device Role / Timing Role: Resistor-programmable trip point allows matching to specific component thermal limits; open-drain OUT interfaces directly with optocouplers or isolation logic. Use Value: Provides deterministic, hardware-based thermal cutoff independent of software execution - critical for functional safety compliance. |
Use Scenario: Mounted on PLC CPU boards or servo amplifier PCBs to monitor processor or power stage temperature during continuous operation. IC Role / Device Role / Timing Role: VTEMP pin connected to onboard ADC for predictive maintenance logging; OUT pin drives LED indicator or fan control logic. Use Value: Combines diagnostic visibility (analog) and autonomous response (digital) in one 6-pin SOT-23 device, minimizing footprint and routing overhead. |
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 |
|---|---|---|---|
| LMT01LPGM | Digital pulse-output (not analog voltage); ±0.5°C accuracy; requires external counter; no hysteresis programming. | Used where high-accuracy digital temperature reading is prioritized over simple trip signaling; incompatible with analog feedback loops. | Select when absolute temperature measurement precision outweighs need for analog output or programmable hysteresis. |
| TMP235AIDBVR | Analog-only output (no digital trip); ±0.5°C accuracy; fixed 10 mV/°C; no RSET or hysteresis pins. | Suitable only for temperature monitoring - lacks overtemperature protection capability; requires external comparator for switching. | Choose when only analog sensing is needed and system already includes digital decision logic; not a functional replacement for TMP300BIDBVR's dual-mode operation. |
Compared with LMT01LPGM and TMP235AIDBVR, the TMP300BIDBVR uniquely combines resistor-programmable trip, selectable hysteresis, and factory-calibrated analog output in a single SOT-23-6 package - enabling both autonomous thermal protection and system-level temperature awareness without added components.
Availability
TMP300BIDBVR is available at Aetrix Electronics and suitable for power-supply systems, DC-DC modules, and electronic protection systems requiring stable component supply, long-term manufacturability, and consistent thermal performance across production batches.
Supply support for TMP300BIDBVR 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 product line was designed specifically for cost-sensitive, space-constrained thermal protection applications requiring both analog monitoring and hardware-based overtemperature shutdown - targeting power conversion, industrial automation, and computing infrastructure.
FAQ
What is the trip point accuracy of the TMP300BIDBVR over its full operating temperature range?
The TMP300BIDBVR has a total trip point accuracy of ±2°C over the full specified temperature range of –40°C to +125°C. This value includes initial accuracy, temperature drift, and hysteresis effects. At +25°C, typical accuracy improves to ±1°C. The specification applies to the TMP300B grade, which is confirmed in the Electrical Characteristics table of the SBOS335F datasheet.
How do I calculate the RSET resistor value to program a specific trip temperature for the TMP300BIDBVR?
To set the TMP300BIDBVR trip point to a desired temperature TSET (in °C), use the equation RSET = 10(50 + TSET)/3 kΩ. For example, a 75°C trip requires RSET = 10(50 + 75)/3 ≈ 417 kΩ. This relationship is derived from the internal 3-μA bias current and VTEMP slope, and is validated in Section 7.2.1 of the TMP300BIDBVR datasheet.
Can the TMP300BIDBVR operate reliably at 1.8 V supply voltage?
Yes, the TMP300BIDBVR is fully specified to operate at 1.8 V. Its functional temperature range at 1.8 V is –40°C to 100 × (1.8 – 0.95) = +85°C, and it maintains 110 μA max quiescent current across this condition. The device remains functional up to +150°C at 1.8 V, though trip accuracy is not guaranteed beyond +85°C per the Electrical Characteristics table.
What is the purpose of the VTEMP pin on the TMP300BIDBVR, and how should it be used?
The VTEMP pin on the TMP300BIDBVR provides a high-impedance analog output (10 mV/°C, 210 kΩ source resistance) proportional to die temperature. It can be used for system calibration, thermal loop compensation, or direct ADC measurement. To avoid loading error, TI recommends buffering VTEMP with an op-amp (e.g., OPA335) before connecting to any downstream circuitry, as detailed in Figure 7-2 of the datasheet.
Does the TMP300BIDBVR support both 5°C and 10°C hysteresis, and how is it selected?
Yes, the TMP300BIDBVR supports two discrete hysteresis levels: 5°C and 10°C. Selection is made by the voltage applied to the HYSTSET pin (Pin 4). Connecting HYSTSET to GND selects 5°C hysteresis; connecting it to V+ selects 10°C hysteresis. No external resistors or timing components are required - this is a purely digital pin-state configuration confirmed in Table 5-1 and Section 7.2.5 of the datasheet.
TMP300BIDBVR Specifications
- Product attributes
- Attribute value
- Manufacturer:
- Texas Instruments
- Series:
- -
- Package/Case:
- SOT-23-6
- Packaging:
- Tape & Reel (TR)
- Product Status:
- Active
- Trip Temperature Threshold:
- Hot
- Switching Temperature:
- Programmable
- Accuracy:
- ±6°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
TMP300BIDBVR FAQ
1.How can I place an order for TMP300BIDBVR through Aetrix?
Please submit a Request for Quotation (RFQ) for TMP300BIDBVR 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 TMP300BIDBVR reliable?
The price and inventory of TMP300BIDBVR are updated periodically and may fluctuate due to market conditions. Stock and pricing data are typically refreshed every 24 hours. Quotation validity for TMP300BIDBVR is usually 5 days.
3.What payment methods are accepted for TMP300BIDBVR?
We accept Wire Transfer, PayPal, Credit Card, Western Union, MoneyGram, and Escrow for TMP300BIDBVR transactions.
Note: Certain payment methods may incur a processing fee.
4.How is shipping managed for TMP300BIDBVR?
TMP300BIDBVR orders can be shipped via leading logistics carriers, including DHL, UPS, FedEx, TNT, or Registered Mail.
Once your TMP300BIDBVR 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 TMP300BIDBVR?
For technical support, including TMP300BIDBVR datasheets, pinout diagrams, or application guidance, please contact our engineering support team. They can provide detailed documentation and assistance for your TMP300BIDBVR requirements.
6.How does Aetrix verify that TMP300BIDBVR is sourced from the original manufacturer or authorized distributors?
All TMP300BIDBVR 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 TMP300BIDBVR meets industry standards.
7.What is the process for return or replacement of TMP300BIDBVR?
All TMP300BIDBVR units undergo pre-shipment inspection (PSI). If there is an issue with TMP300BIDBVR, 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 TMP300BIDBVR part is unused and in its original packaging.
Return procedure for TMP300BIDBVR:
1.Submit a request within 90 days.
2.Obtain a Return Material Authorization (RMA) from Aetrix.
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