Overview
The TPS3808G01DBVR, produced by Texas Instruments, is a microprocessor supervisory circuit designed to monitor system voltages and generate a reset signal when the voltage drops below a preset threshold or when the manual reset pin is triggered. This device is part of the TPS3808 family and is particularly suited for applications requiring low quiescent current and high threshold accuracy.
It features adjustable reset delay times and can monitor voltages from 0.4 V to 5 V, making it versatile for various electronic systems. The device is available in small SOT-23 and 2-mm × 2-mm WSON packages, and it operates over a wide temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Quiescent Current (Typical) | 2.4 | µA |
| Threshold Accuracy (Typical) | 0.5% | - |
| Fixed Threshold Voltages | 0.9 V to 5 V | - |
| Adjustable Threshold Voltage | Down to 0.4 V | - |
| Reset Delay Time | 1.25 ms to 10 s | - |
| Manual Reset (MR) Input | Logic Low | - |
| RESET Output | Open-drain | - |
| Operating Temperature Range | –40°C to 125°C | - |
| Package Types | SOT-23, 2-mm × 2-mm WSON | - |
Key Features
- Power-on reset generator with adjustable delay time from 1.25 ms to 10 s
- Very low quiescent current of 2.4 µA typical, making it suitable for battery-powered applications
- High threshold accuracy of 0.5% typical for voltages up to 3.3 V
- Fixed threshold voltages for standard voltage rails from 0.9 V to 5 V and adjustable voltage down to 0.4 V
- Manual reset (MR) input and open-drain RESET output
- Small package options including SOT-23 and 2-mm × 2-mm WSON
- Wide operating temperature range of –40°C to 125°C
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 typical quiescent current of the TPS3808G01DBVR?
The typical quiescent current is 2.4 µA.
- What is the range of adjustable reset delay times for the TPS3808G01DBVR?
The reset delay time can be adjusted from 1.25 ms to 10 s.
- What are the available package types for the TPS3808G01DBVR?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the operating temperature range of the TPS3808G01DBVR?
The operating temperature range is from –40°C to 125°C.
- How can the threshold voltage be adjusted on the TPS3808G01DBVR?
The threshold voltage can be adjusted down to 0.4 V using an external resistor divider.
- What type of output does the TPS3808G01DBVR have for the RESET signal?
The RESET output is an open-drain type.
- What is the purpose of the manual reset (MR) input on the TPS3808G01DBVR?
The manual reset (MR) input allows for a manual reset by dropping the pin to a logic low.
- How does the TPS3808G01DBVR handle short negative transients on the SENSE pin?
The device is relatively immune to short negative transients on the SENSE pin, with sensitivity dependent on threshold overdrive.
- What is the recommended practice for the SENSE input to reduce sensitivity to transients and layout parasitics?
It is recommended to use a 1-nF to 10-nF bypass capacitor on the SENSE input.
- What are some common applications for the TPS3808G01DBVR?
Common applications include DSP or microcontroller systems, notebook and desktop computers, PDAs, hand-held products, portable and battery-powered products, and FPGA and ASIC applications.
