Overview
The TPS3808G33DBVTG4 is a microprocessor supervisory circuit produced by Texas Instruments. This device is part of the TPS3808 family, 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. The TPS3808G33DBVTG4 is specifically configured to monitor a 3.3V voltage rail, making it suitable for a wide range of applications including DSP, microcontroller, notebook, and handheld devices.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Input Supply Range | 1.7 to 6.5 | V |
| Threshold Voltage (VIT) | 3.07 | V |
| Supply Current (IDD) | 2.4 (typical) | μA |
| Operating Temperature Range | –40°C to 125°C | °C |
| Package Type | SOT-23 (6 pins) | |
| Package Size | 2.90 mm x 1.60 mm | mm |
| Reset Delay Time | 1.25 ms to 10 s (adjustable) | s |
| Manual Reset (MR) Input | Logic low to assert reset | |
| RESET Output | 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
- 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 TPS3808G33DBVTG4? 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 threshold voltage for the TPS3808G33DBVTG4? The threshold voltage (VIT) for the TPS3808G33DBVTG4 is 3.07 V.
- What is the typical quiescent current of the TPS3808G33DBVTG4? The typical quiescent current is 2.4 μA.
- How can the reset delay time be adjusted? The reset delay time can be adjusted by connecting the CT pin to VDD using a resistor, leaving the CT pin open, or connecting an external capacitor to the CT pin.
- What are the available package types for the TPS3808G33DBVTG4? The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the operating temperature range of the TPS3808G33DBVTG4? The operating temperature range is –40°C to 125°C.
- Can the TPS3808G33DBVTG4 be used in battery-powered applications? Yes, it is well-suited for battery-powered applications due to its very low quiescent current.
- How does the manual reset (MR) input work? The manual reset (MR) input asserts the reset when driven low.
- What type of output does the RESET pin have? The RESET output is open-drain.
- Is the TPS3808G33DBVTG4 immune to short negative transients on the SENSE pin? Yes, it is relatively immune to short negative transients on the SENSE pin, with sensitivity dependent on threshold overdrive.
