Overview
The TPS3702CX33DDCR is a high-accuracy overvoltage and undervoltage window voltage detector produced by Texas Instruments. This device is integrated into a small SOT-6 package, making it ideal for systems that operate on low-voltage supply rails with narrow margin supply tolerances. It features internal glitch immunity and noise filters to eliminate false resets resulting from erroneous signals. The TPS3702 does not require external resistors for setting overvoltage and undervoltage reset thresholds, which increases overall accuracy and reduces solution size and cost.
Key Specifications
| Parameter | Description |
|---|---|
| Package | SOT-6 (TSOT-23-6) |
| Input Voltage Range | 2 V to 18 V |
| Threshold Accuracy | 0.25% (typ), 0.9% (–40°C to 125°C) |
| Threshold Hysteresis | 0.55%, 1.0% |
| Quiescent Current | 7 µA (typ) |
| Operating Temperature Range | –40°C to 125°C |
| Output Configuration | Open-drain outputs for OV and UV |
| SENSE and VDD Pins | Separate input pins for redundancy in safety-critical systems |
Key Features
- High threshold accuracy: 0.25% (typ), 0.9% (–40°C to 125°C)
- Internal glitch immunity and noise filters to prevent false resets
- No external resistors required for setting overvoltage and undervoltage thresholds
- Threshold adjust using the SET pin to select between two available threshold voltages
- Low quiescent current: 7 µA (typ)
- Open-drain outputs for overvoltage and undervoltage indication
- Independent reset outputs for OV and UV pins, which can be tied together
- Outputs can be pulled up to 18V, independent of the device supply voltage
Applications
- FPGA and ASIC applications
- DSP-based systems
- Industrial control systems
- Factory automation
- Personal electronics
- Building automation
- Motor drives
Q & A
- What is the primary function of the TPS3702CX33DDCR?
The primary function of the TPS3702CX33DDCR is to monitor voltage supplies for overvoltage and undervoltage conditions, providing accurate and reliable reset signals when the monitored voltage is outside the specified window.
- What is the input voltage range of the TPS3702CX33DDCR?
The input voltage range of the TPS3702CX33DDCR is from 2 V to 18 V.
- How accurate are the threshold voltages of the TPS3702CX33DDCR?
The threshold voltages of the TPS3702CX33DDCR have a high accuracy of 0.25% (typ) and 0.9% over the temperature range of –40°C to 125°C.
- Does the TPS3702CX33DDCR require external resistors for setting thresholds?
No, the TPS3702CX33DDCR does not require external resistors for setting overvoltage and undervoltage thresholds, as these are integrated into the device.
- What is the quiescent current of the TPS3702CX33DDCR?
The quiescent current of the TPS3702CX33DDCR is typically 7 µA.
- What is the operating temperature range of the TPS3702CX33DDCR?
The operating temperature range of the TPS3702CX33DDCR is from –40°C to 125°C.
- How are the output signals configured in the TPS3702CX33DDCR?
The TPS3702CX33DDCR features open-drain outputs for overvoltage and undervoltage indication, which can be pulled up to 18V independent of the device supply voltage.
- Can the overvoltage and undervoltage outputs be tied together?
- What types of systems benefit from using the TPS3702CX33DDCR?
The TPS3702CX33DDCR is beneficial for safety-critical and high-reliability systems, including FPGA, ASIC, DSP-based systems, industrial control systems, factory automation, personal electronics, building automation, and motor drives.
- How does the SET pin function in the TPS3702CX33DDCR?
The SET pin allows the user to select between two available threshold voltages, enabling the adjustment of the accuracy band during different system conditions.
