Overview
The TPS3808G01Q1EVM is a microprocessor supervisory circuit developed by Texas Instruments. This device is part of the TPS3808 family and is designed to monitor system voltages, ensuring reliable operation of microprocessors and other digital systems. It features a low-quiescent current, programmable delay, and manual reset capabilities, making it suitable for a wide range of applications, particularly in battery-powered devices.
Key Specifications
| Parameter | Description |
|---|---|
| Supply Voltage Range | 1.8 V to 6.5 V |
| Threshold Voltage Range | 0.4 V to 5 V |
| Threshold Accuracy | 0.5% for VIT ≤ 3.3 V |
| Reset Delay Time | 20 ms (default), 300 ms (with resistor), or user-adjustable (1.25 ms to 10 s) |
| Quiescent Current | 2.4 µA typical |
| Package Options | SOT-23 and 2-mm × 2-mm WSON |
| Temperature Range | –40°C to 125°C (TJ) |
| Manual Reset Input | Yes, MR pin |
| RESET Output | Open-drain |
Key Features
- Power-On Reset Generator with Adjustable Delay Time: 1.25 ms to 10 s
- Very Low Quiescent Current: 2.4 µA typical, suitable for battery-powered applications
- High Threshold Accuracy: 0.5% typical for VIT ≤ 3.3 V
- Fixed and Adjustable Threshold Voltages: Available for standard voltage rails from 0.9 V to 5 V and adjustable down to 0.4 V
- Manual Reset Input: MR pin for manual reset capability
- Open-Drain RESET Output: Compatible with various system configurations
- Compact Packages: Available in SOT-23 and 2-mm × 2-mm WSON packages
Applications
The TPS3808G01Q1EVM is well-suited for a variety of applications, including:
- Battery-powered devices due to its low quiescent current
- Microprocessor and microcontroller systems requiring reliable power-on reset and voltage monitoring
- Industrial control systems and automation
- Medical devices and portable electronics
- Aerospace and automotive systems where precise voltage monitoring is critical
Q & A
- What is the primary function of the TPS3808G01Q1EVM?
The primary function 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 activated.
- What is the range of supply voltages for the TPS3808G01Q1EVM?
The supply voltage range is from 1.8 V to 6.5 V.
- 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 user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor.
- What is the typical quiescent current of the TPS3808G01Q1EVM?
The typical quiescent current is 2.4 µA.
- What are the available package options for the TPS3808G01Q1EVM?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the temperature range for the TPS3808G01Q1EVM?
The device is fully specified over a temperature range of –40°C to 125°C (TJ).
- Does the TPS3808G01Q1EVM have a manual reset feature?
Yes, it has a manual reset input (MR pin).
- What type of output does the RESET signal have?
The RESET output is open-drain.
- What are some common applications for the TPS3808G01Q1EVM?
Common applications include battery-powered devices, microprocessor and microcontroller systems, industrial control systems, medical devices, and aerospace and automotive systems.
- How accurate is the threshold voltage monitoring of the TPS3808G01Q1EVM?
The threshold accuracy is 0.5% typical for VIT ≤ 3.3 V.
