Overview
The TPS3808G125DBVR is a low-quiescent current supervisor with programmable delay and manual reset, manufactured by Texas Instruments. This device is part of the TPS3808 family of microprocessor supervisory circuits, designed to monitor system voltages ranging from 0.4 V to 5 V. It asserts an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin drops to a logic low. The RESET output remains low for a user-adjustable delay time after the SENSE voltage and manual reset (MR) return above the respective thresholds. This component is particularly suited for battery-powered applications due to its very low typical quiescent current of 2.4 µA and is available in SOT-23 and 2-mm × 2-mm WSON packages, fully specified over a temperature range of –40°C to 125°C.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBV), 6 pins |
| Operating Temperature Range | –40°C to 125°C |
| Quiescent Current | 2.4 µA typical |
| Threshold Accuracy | 0.5% typical for VIT ≤ 3.3 V |
| Threshold Voltages | Fixed: 0.9 V to 5 V, Adjustable: down to 0.4 V |
| Reset Delay Time | 1.25 ms to 10 s (user-adjustable) |
| Manual Reset (MR) Input | Logic low |
| RESET Output | Open-drain |
| VDD Range | 1.7 V to 6.5 V |
Key Features
- 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 0.9 V to 5 V and adjustable voltage down to 0.4 V
- Manual reset (MR) input
- Open-drain RESET output
- Small SOT-23 and 2-mm × 2-mm WSON packages
Applications
The TPS3808G125DBVR is well-suited for a variety of applications, particularly those requiring low power consumption and precise voltage monitoring. These include:
- Battery-powered devices
- Microprocessor and microcontroller systems
- Embedded systems
- Industrial control systems
- Automotive electronics
Q & A
- What is the primary function of the TPS3808G125DBVR?
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 triggered. - What is the typical quiescent current of the TPS3808G125DBVR?
The typical quiescent current is 2.4 µA. - What is the range of adjustable delay time for the reset signal?
The reset delay time can be adjusted from 1.25 ms to 10 s. - What are the available package types for the TPS3808G125DBVR?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages. - What is the operating temperature range of the TPS3808G125DBVR?
The operating temperature range is –40°C to 125°C. - How accurate is the threshold voltage monitoring?
The threshold accuracy is 0.5% typical for VIT ≤ 3.3 V. - Can the threshold voltage be adjusted?
Yes, the threshold voltage can be adjusted down to 0.4 V. - What type of output does the RESET pin have?
The RESET output is open-drain. - Is the TPS3808G125DBVR suitable for battery-powered applications?
Yes, it is particularly suited for battery-powered applications due to its low quiescent current. - What is the VDD range for the TPS3808G125DBVR?
The VDD range is from 1.7 V to 6.5 V.
