Overview
The TPS3851H33EQDRBRQ1 is a high-accuracy voltage supervisor with an integrated watchdog timer, designed and manufactured by Texas Instruments. This device is part of the TPS3851 series, which is known for its precision and reliability in voltage supervision and system reset functions. The TPS3851H33EQDRBRQ1 is AEC-Q100 qualified, ensuring it meets stringent automotive standards with an operating temperature range of -40°C to 125°C. It combines a precision undervoltage supervisor with a programmable watchdog timer, making it ideal for use in critical systems where tight voltage tolerances are essential.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | -0.3 to 7 | V |
| Operating Temperature Range | -40 to 125 | °C |
| Undervoltage Threshold Accuracy | 0.8% | - |
| RESET Delay Accuracy | 15% | - |
| Package Type | VSON (DRB)-8 | - |
| Package Size | 3.00 mm × 3.00 mm | - |
| Junction-to-Ambient Thermal Resistance | 47.7 | °C/W |
Key Features
- Precision Undervoltage Supervisor: Achieves 0.8% accuracy over the specified temperature range of -40°C to +125°C.
- Programmable Watchdog Timer: Can be programmed using an external capacitor or factory-programmed default delay settings.
- Independent Watchdog Output (WDO): Provides the flexibility to flag a fault in the watchdog timing without performing an entire system reset.
- RESET Delay with High Precision: Features a 15% accuracy in delay timing.
- Dynamic Watchdog Enable/Disable: The watchdog timer can be enabled or disabled via the SET1 pin.
- Compact Package: Available in a small 3.00-mm × 3.00-mm, 8-pin VSON package with wettable flanks for easy optical inspection.
Applications
- Automotive Systems: AEC-Q100 qualified, making it suitable for automotive applications where high reliability and precision are critical.
- Industrial Control Systems: Ideal for systems requiring tight voltage tolerances and robust supervision.
- Embedded Systems: Useful in microcontroller and system-on-a-chip (SoC) applications to ensure stable power supply and prevent unwanted shutdowns.
- Critical Infrastructure: Suitable for use in systems where precise voltage monitoring and supervision are essential for optimal operation.
Q & A
- What is the operating temperature range of the TPS3851H33EQDRBRQ1?
The operating temperature range is -40°C to 125°C.
- What is the accuracy of the undervoltage threshold?
The undervoltage threshold accuracy is 0.8% over the specified temperature range.
- How can the watchdog timer be programmed?
The watchdog timer can be programmed using an external capacitor or factory-programmed default delay settings.
- What is the purpose of the WDO (Watchdog Output) pin?
The WDO pin provides the flexibility to flag a fault in the watchdog timing without performing an entire system reset.
- How can the watchdog timer be enabled or disabled?
The watchdog timer can be enabled or disabled via the SET1 pin.
- What is the package type and size of the TPS3851H33EQDRBRQ1?
The package type is VSON (DRB)-8, and the size is 3.00 mm × 3.00 mm.
- What is the junction-to-ambient thermal resistance of the device?
The junction-to-ambient thermal resistance is 47.7 °C/W.
- Is the TPS3851H33EQDRBRQ1 suitable for automotive applications?
Yes, it is AEC-Q100 qualified, making it suitable for automotive applications.
- What is the significance of the RESET delay accuracy?
The RESET delay accuracy is 15%, ensuring high precision in delay timing.
- How does the device ensure proper voltage levels during reset?
The device ensures proper voltage levels by using a pullup resistor connected to the proper voltage rail.
