Overview
The TPS3808G50QDBVRQ1 is a low-quiescent current, programmable-delay supervisor IC designed by Texas Instruments. This device is specifically qualified for automotive applications and is part of the TPS3808-Q1 family. It monitors system voltages ranging from 0.4 V to 5 V and asserts an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin is asserted to a logic low. The RESET output remains low for a user-adjustable delay time after the SENSE voltage and MR return above their thresholds. The device is known for its high threshold accuracy and very low quiescent current, making it suitable for battery-powered applications.
Key Specifications
| Attribute | Value |
|---|---|
| Package | SOT-23 (DBV)-6 |
| Pins | 6 |
| Operating Temperature Range (°C) | -40 to 125 |
| Voltage Threshold | 4.65 V |
| Output | Open Drain or Open Collector |
| Reset | Active Low |
| Reset Timeout | Adjustable/Selectable |
| Quiescent Current | 2.4 µA Typical |
| Mounting Type | Surface Mount |
| Series | Automotive, AEC-Q100 |
| Product Status | Active |
Key Features
- Qualified for Automotive Applications
- Power-On Reset Generator With Adjustable Delay Time: 1.25 ms to 10 s
- Very Low Quiescent Current: 2.4 µA Typical
- High Threshold Accuracy: 0.5% Typical for VIT ≤ 3.3 V
- Fixed Threshold Voltages for Standard Voltage Rails From 1.2 V to 5 V and Adjustable Voltage Down to 0.4 V
- Manual Reset (MR) Input
- Open-Drain RESET Output
- Temperature Range: –40°C to +125°C
- Small SOT-23 Package and WSON Package (for some variants)
Applications
- DSP or Microcontroller Applications
- FPGA and ASIC Applications
- Automotive Vision
- Automotive Radar
- Battery-Powered Applications
Q & A
- What is the primary function of the TPS3808G50QDBVRQ1?
The primary function of the TPS3808G50QDBVRQ1 is to monitor system voltages and assert a reset signal when the voltage drops below a preset threshold or when the manual reset pin is asserted.
- What is the operating temperature range of the TPS3808G50QDBVRQ1?
The operating temperature range is from -40°C to 125°C.
- What is the typical quiescent current of the TPS3808G50QDBVRQ1?
The typical quiescent current is 2.4 µA.
- How can the reset delay time be adjusted?
The reset delay time can be set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD using a resistor, or can be user-adjusted from 1.25 ms to 10 s by connecting the CT pin to an external capacitor.
- What types of applications is the TPS3808G50QDBVRQ1 suited for?
The device is suited for DSP or microcontroller applications, FPGA and ASIC applications, automotive vision, automotive radar, and battery-powered applications.
- What is the voltage threshold for the TPS3808G50QDBVRQ1?
The voltage threshold for the TPS3808G50QDBVRQ1 is 4.65 V.
- What is the package type of the TPS3808G50QDBVRQ1?
The package type is SOT-23 (DBV)-6.
- Is the TPS3808G50QDBVRQ1 qualified for automotive applications?
- How does the manual reset (MR) input work?
The manual reset (MR) input allows a processor or other logic circuits to initiate a reset. A logic low on MR causes RESET to assert low. After MR returns to a logic high and SENSE is above its reset threshold, RESET is deasserted high after the user-defined reset delay expires.
- What is the significance of the high threshold accuracy in the TPS3808G50QDBVRQ1?
The high threshold accuracy of 0.5% ensures reliable monitoring of system voltages, especially for critical applications.
