Overview
The TPS3808G30DBVTG4 is a microprocessor supervisory circuit from Texas Instruments, designed to monitor system voltages and assert a RESET signal when the voltage drops below a preset threshold or when the manual reset (MR) pin is driven low. This device is part of the TPS3808 family, which is known for its high threshold accuracy and low quiescent current, making it suitable for battery-powered applications.
The TPS3808G30DBVTG4 is available in a small SOT-23 package and operates over a temperature range of –40°C to 125°C. It features a power-on reset generator with an adjustable delay time, which can be set between 1.25 ms and 10 s using an external capacitor.
Key Specifications
| Parameter | Value |
|---|---|
| Package | SOT-23 (DBV) - 6 pins |
| Operating Temperature Range | –40°C to 125°C |
| Threshold Voltage | 2.79V (for this specific model) |
| Reset Type | Active Low/Open Drain |
| Reset Timeout | Adjustable/Selectable (1.25 ms to 10 s) |
| Supply Voltage Min/Max | 1.7V / 6.5V |
| Quiescent Current | 2.4 μA typical |
| Threshold Accuracy | 0.5% typical for VIT ≤ 3.3 V |
| Manual Reset (MR) Input | Yes |
| Mounting Type | Surface Mount |
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
- Temperature range: –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 primary function of the TPS3808G30DBVTG4?
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 (MR) pin is driven low.
- What is the operating temperature range of the TPS3808G30DBVTG4?
The operating temperature range is –40°C to 125°C.
- What is the typical quiescent current of the TPS3808G30DBVTG4?
The typical quiescent current is 2.4 μA.
- How can the reset delay time be adjusted?
The reset delay time can be adjusted between 1.25 ms and 10 s using an external capacitor connected to the CT pin.
- What are the available package types for the TPS3808G30DBVTG4?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the threshold accuracy of the TPS3808G30DBVTG4?
The threshold accuracy is 0.5% typical for VIT ≤ 3.3 V.
- Does the TPS3808G30DBVTG4 have a manual reset feature?
Yes, it has a manual reset (MR) input.
- What is the supply voltage range for the TPS3808G30DBVTG4?
The supply voltage range is from 1.7V to 6.5V.
- Is the TPS3808G30DBVTG4 suitable for battery-powered applications?
Yes, due to its very low quiescent current, it is well-suited for battery-powered applications.
- What type of reset output does the TPS3808G30DBVTG4 have?
The reset output is open-drain.
