Overview
The TPS3851G30EQDRBRQ1, produced by Texas Instruments, is a high-accuracy voltage supervisor with an integrated watchdog timer. This device is specifically designed for automotive applications and is AEC-Q100 qualified, ensuring it meets stringent automotive standards. It operates over a wide temperature range of –40°C to 125°C, making it suitable for various harsh environments. The TPS3851-Q1 combines a precision voltage supervisor with a programmable watchdog timer, offering high accuracy and reliability in monitoring and managing system voltages and timeouts.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Supply Voltage Range | –0.3 to 7 | V |
| Undervoltage Threshold Accuracy | 0.8% | % |
| Operating Temperature Range | –40 to 125 | °C |
| Watchdog Timeout Options | Programmable via capacitor or preset settings | |
| Reset Delay Accuracy | 15% | % |
| Package Type | 8-pin VSON | |
| 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 set using an external capacitor or factory-programmed default delay settings.
- Independent Watchdog Output (WDO): Provides flexibility to flag a fault in the watchdog timing without performing an entire system reset.
- Manual Reset (MR) Input: Allows a processor or other logic circuits to initiate a reset.
- SET1 Pin for Watchdog Enable/Disable: Enables or disables the watchdog timer dynamically.
- Small Package Size: Available in a 3.00-mm × 3.00-mm, 8-pin VSON package with wettable flanks for easy optical inspection.
Applications
The TPS3851G30EQDRBRQ1 is designed for use in automotive and other high-reliability applications where precise voltage monitoring and watchdog functionality are critical. It is particularly suited for systems requiring tight tolerance voltage supervision, such as:
- Automotive control units
- Industrial control systems
- Medical devices
- Aerospace and defense systems
Q & A
- What is the operating temperature range of the TPS3851G30EQDRBRQ1?
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 timeout be programmed?
The watchdog timeout can be programmed using an external capacitor or by using factory-programmed default delay settings.
- What is the purpose of the SET1 pin?
The SET1 pin enables or disables the watchdog timer dynamically.
- What is the significance of the WDO (Watchdog Output) pin?
The WDO pin provides an independent signal to flag a fault in the watchdog timing without performing an entire system reset.
- How does the manual reset (MR) input work?
A logic low on the MR input causes the RESET to assert. After MR returns to a logic high and VDD is above VITN + VHYST, RESET is deasserted after the reset delay time (tRST).
- What is the package type and size of the TPS3851G30EQDRBRQ1?
The device is available in a 3.00-mm × 3.00-mm, 8-pin VSON package.
- Is the TPS3851G30EQDRBRQ1 AEC-Q100 qualified?
Yes, the device is AEC-Q100 qualified.
- What are some typical applications for the TPS3851G30EQDRBRQ1?
Typical applications include automotive control units, industrial control systems, medical devices, and aerospace and defense systems.
- How does the thermal pad of the TPS3851G30EQDRBRQ1 contribute to its performance?
The thermal pad is internally connected to GND and should be connected to a large-area ground plane to enhance thermal performance.
