Overview
The TPS3808G50DBVTG4 is a microprocessor supervisory circuit produced by Texas Instruments. This device is part of the TPS3808 family, which is designed to monitor system voltages and provide a reset signal when the voltage drops below a preset threshold or when the manual reset pin is triggered. The TPS3808G50DBVTG4 is particularly suited for battery-powered applications due to its very low typical quiescent current of 2.4 µA. It operates over a wide temperature range of –40°C to 125°C and is available in small SOT-23 and 2-mm × 2-mm WSON packages.
Key Specifications
| Parameter | Value |
|---|---|
| Package Type | SOT-23 (DBV) |
| Pins | 6 |
| Operating Temperature Range (°C) | –40 to 125 |
| Quiescent Current (Typical) | 2.4 µA |
| Monitored Voltage Range | Adjustable, 0.9 V to 5 V |
| Reset Threshold Accuracy | 0.5% typical for VIT ≤ 3.3 V |
| Reset Delay Time | Programmable: 1.25 ms to 10 s |
| VCC Range | 1.8 V to 6.5 V |
| Output Driver Type / Reset Output | Active-low, 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
- 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 TPS3808G50DBVTG4 is well-suited for a variety of applications, including:
- Battery-powered devices due to its low quiescent current
- Microprocessor and microcontroller systems requiring voltage monitoring and reset functionality
- Embedded systems where precise voltage monitoring is critical
- Industrial control systems and automation
- Consumer electronics requiring reliable power management
Q & A
- What is the typical quiescent current of the TPS3808G50DBVTG4? The typical quiescent current is 2.4 µA.
- What is the operating temperature range of the TPS3808G50DBVTG4? The operating temperature range is –40°C to 125°C.
- What types of packages are available for the TPS3808G50DBVTG4? It 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 threshold accuracy for the TPS3808G50DBVTG4? 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 using an external resistor divider.
- What is the purpose of the manual reset (MR) input? The manual reset (MR) input allows for manual triggering of the reset signal by pulling the MR pin to a logic low.
- What type of output does the TPS3808G50DBVTG4 have? The output is an active-low, open-drain RESET signal.
- Is the TPS3808G50DBVTG4 suitable for battery-powered applications? Yes, it is well-suited for battery-powered applications due to its very low quiescent current.
- What is the maximum VCC for the TPS3808G50DBVTG4? The maximum VCC is 6.5 V.
