Overview
The TPS3702CX50DDCR from Texas Instruments is a high-accuracy overvoltage and undervoltage window voltage detector. This device is packaged in a small SOT-6 package, making it an excellent choice for systems operating on low-voltage supply rails with narrow margin supply tolerances. It features internal resistors for setting overvoltage and undervoltage reset thresholds, eliminating the need for external resistors and thus increasing overall accuracy and reducing solution size and cost. The device is designed for safety-critical and high-reliability systems, offering independent reset outputs for overvoltage (OV) and undervoltage (UV) with open-drain configuration, allowing the outputs to be tied together if needed.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-6 | - |
| Body Size | 2.90mm × 1.60mm | - |
| Supply Voltage Range | 2V to 18V | V |
| Threshold Hysteresis | 0.55%, 1.0% | % |
| Quiescent Current | 7µA (typical) | A |
| Operating Temperature Range | –40°C to 125°C | °C |
| SENSE Input Current | 1 to 1.5µA | A |
| SET Pin Internal Pull-up Current | 600nA | A |
| Low-level Output Voltage | 250mV (max) | V |
| Output Sink Current | Up to 10mA | A |
| Junction-to-Ambient Thermal Resistance | 201.6°C/W | °C/W |
Key Features
- High Accuracy: The TPS3702 offers highly accurate window threshold voltages with an accuracy of 0.9% over temperature.
- Internal Resistors: No external resistors are required for setting overvoltage and undervoltage reset thresholds, enhancing accuracy and reducing component count.
- Low Threshold Hysteresis: Options of 0.55% and 1.0% prevent false reset signals during normal operation.
- Glitch Immunity and Noise Filters: Internal filters eliminate false resets due to erroneous signals.
- Independent Reset Outputs: Open-drain outputs for OV and UV can be tied together if necessary.
- Low Quiescent Current: Typical quiescent current of 7µA.
- Wide Supply Voltage Range: Operates from 2V to 18V.
- Redundancy for Safety-Critical Systems: Separate SENSE input pin and VDD pin for redundancy in safety-critical and high-reliability systems.
Applications
The TPS3702 is suitable for a variety of applications, including:
- Low-Voltage Systems: Ideal for systems operating on low-voltage supply rails with narrow margin supply tolerances.
- Safety-Critical Systems: Used in safety-critical and high-reliability systems due to its redundancy features and high accuracy.
- Power Supply Monitoring: Monitors power supply voltages to ensure they remain within specified limits.
- Reset and Enable Inputs: Can be connected to the reset or enable inputs of processors, voltage regulators, or other critical components.
Q & A
- What is the package type of the TPS3702CX50DDCR?
The TPS3702CX50DDCR is packaged in a small SOT-6 package. - What is the supply voltage range of the TPS3702?
The device operates over a supply voltage range of 2V to 18V. - Does the TPS3702 require external resistors for setting thresholds?
No, the TPS3702 includes internal resistors for setting overvoltage and undervoltage reset thresholds. - What are the threshold hysteresis options for the TPS3702?
The threshold hysteresis options are 0.55% and 1.0%. - What is the typical quiescent current of the TPS3702?
The typical quiescent current is 7µA. - What is the operating temperature range of the TPS3702?
The device operates over an industrial temperature range of –40°C to 125°C. - Can the OV and UV outputs be tied together?
Yes, the OV and UV outputs can be tied together due to their open-drain configuration. - What is the maximum sink current for the outputs?
The outputs can sink up to 10mA. - Does the TPS3702 have built-in noise filters?
Yes, the device includes internal glitch immunity and noise filters to eliminate false resets. - What is the junction-to-ambient thermal resistance of the TPS3702?
The junction-to-ambient thermal resistance is 201.6°C/W.
