Overview
The TPS3808G18DBVTG4 is a microprocessor supervisory circuit from Texas Instruments, designed to monitor system voltages and ensure reliable operation of microprocessors and other digital systems. This device is part of the TPS3808 family, which offers a range of features including power-on reset generation, adjustable delay times, and very low quiescent current. It is particularly suited for applications requiring precise voltage monitoring and low power consumption.
Key Specifications
| Parameter | Value |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TPS3808G18DBVTG4 |
| Package Type | SOT-23 (DBV) - 6 pins |
| Operating Temperature Range | -40°C to 125°C |
| Supply Voltage Range | 1.8 V to 6.5 V |
| Threshold Voltage | Fixed and adjustable options, down to 0.4 V |
| Reset Threshold Accuracy | 0.5% typical for VIT ≤ 3.3 V |
| Quiescent Current | 2.4 µA typical |
| Reset Delay Time | 1.25 ms to 10 s (user-adjustable) |
| Output Driver Type/Reset Output | Active-low, Open-drain |
| Manual Reset | Yes |
Key Features
- Power-on reset generator with adjustable delay time: 1.25 ms to 10 s
- Very low quiescent current: 2.4 µA typical, making it suitable for battery-powered applications
- High threshold accuracy: 0.5% typical for VIT ≤ 3.3 V
- Fixed and adjustable threshold voltages for standard voltage rails from 0.9 V to 5 V and down to 0.4 V
- Manual reset (MR) input
- Open-drain RESET output
- Small SOT-23 and 2-mm × 2-mm WSON packages
Applications
- DSP or microcontroller applications
- Notebook and desktop computers
- PDAs and hand-held products
- Portable and battery-powered products
- FPGA and ASIC applications
Q & A
- What is the primary function of the TPS3808G18DBVTG4?
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 operating temperature range of the TPS3808G18DBVTG4?
The operating temperature range is -40°C to 125°C.
- What are the available package types for the TPS3808G18DBVTG4?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- 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 TPS3808G18DBVTG4?
The typical quiescent current is 2.4 µA.
- Does the TPS3808G18DBVTG4 have a manual reset feature?
Yes, it has a manual reset (MR) input.
- What is the output type of the RESET signal?
The output type is active-low, open-drain.
- What are some common applications for the TPS3808G18DBVTG4?
Common applications include DSP or microcontroller systems, notebook and desktop computers, PDAs, hand-held products, and portable battery-powered devices.
- Is the TPS3808G18DBVTG4 suitable for battery-powered applications?
Yes, due to its very low quiescent current, it is well-suited for battery-powered applications.
- What is the threshold accuracy of the TPS3808G18DBVTG4 for VIT ≤ 3.3 V?
The threshold accuracy is 0.5% typical for VIT ≤ 3.3 V.
