Overview
The TPS3808G25DBVT 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 TPS3808G25DBVT is particularly suited for applications requiring low quiescent current and adjustable reset delay times, making it ideal for battery-powered devices and other power-sensitive applications.
Key Specifications
| Parameter | Value | Unit |
|---|---|---|
| Package | SOT-23 (DBV) | - |
| Pins | 6 | - |
| Operating Temperature Range | -40°C to 125°C | °C |
| Input Supply Range | 1.7 V to 6.5 V | V |
| Supply Current (VDD = 3.3 V, RESET not asserted) | 2.4 μA (typical) | μA |
| Threshold Voltage (VIT) | 2.33 V (for TPS3808G25) | V |
| Reset Delay Time | 1.25 ms to 10 s (user-adjustable) | s |
| Low-Level Output Voltage | 0.4 V (for VDD ≥ 1.8 V, IOL = 1 mA) | 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
- Temperature range: –40°C to 125°C
- Small SOT-23 and 2-mm × 2-mm WSON packages
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 TPS3808G25DBVT? 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 typical quiescent current of the TPS3808G25DBVT? The typical quiescent current is 2.4 μA.
- What is the range of the adjustable reset delay time? The reset delay time can be adjusted between 1.25 ms and 10 s.
- What are the available package options for the TPS3808G25DBVT? The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the operating temperature range of the TPS3808G25DBVT? The operating temperature range is –40°C to 125°C.
- How is the reset delay time set? The reset delay time can be set by connecting the CT pin to VDD, leaving it open, or connecting it to an external capacitor.
- What is the threshold voltage for the TPS3808G25DBVT? The threshold voltage for the TPS3808G25DBVT is 2.33 V.
- Is the TPS3808G25DBVT suitable for battery-powered applications? Yes, it is well-suited for battery-powered applications due to its low quiescent current.
- What is the purpose of the manual reset (MR) input? The manual reset (MR) input allows for manual assertion of the RESET signal by driving the MR pin low.
- How does the device 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.
