Overview
The TPS3808G25DBVTG4 is a microprocessor supervisory circuit produced by Texas Instruments. This device is part of the TPS3808 family, designed to monitor system voltages and provide a power-on reset function with adjustable delay times. It is particularly suited for applications requiring low quiescent current, making it ideal for battery-powered devices. The TPS3808G25DBVTG4 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 | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| VDD (Input supply range) | –40°C < TJ < 125°C | 1.7 | 6.5 | V | |
| IDD (Supply current) | VDD = 3.3 V, RESET not asserted, MR, RESET, CT open | 2.4 | 5 | μA | |
| VOL (Low-level output voltage) | 1.3 V ≤ VDD < 1.8 V, IOL = 0.4 mA | 0.3 | V | ||
| Operating Temperature Range | –40 | 125 | °C | ||
| Output Driver Type / Reset Output | Active-low, Open-drain | ||||
| Package Type | SOT-23 | ||||
| Reset Threshold Accuracy | 0.5% (typical for VIT ≤ 3.3 V) | ||||
| Time Delay | Programmable (1.25 ms to 10 s) |
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 TPS3808G25DBVTG4?
The primary function of the TPS3808G25DBVTG4 is to monitor system voltages and provide a power-on reset signal with adjustable delay times.
- What is the typical quiescent current of the TPS3808G25DBVTG4?
The typical quiescent current is 2.4 μA.
- What is the operating temperature range of the TPS3808G25DBVTG4?
The operating temperature range is –40°C to 125°C.
- What types of packages are available for the TPS3808G25DBVTG4?
The device 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 can be user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor.
- What is the threshold accuracy of the TPS3808G25DBVTG4?
The threshold accuracy is 0.5% typical for VIT ≤ 3.3 V.
- Does the TPS3808G25DBVTG4 have a manual reset feature?
- What is the output type of the RESET signal?
The RESET output is active-low and open-drain.
- What are some common applications for the TPS3808G25DBVTG4?
Common applications include DSP or microcontroller applications, notebook and desktop computers, PDAs, hand-held products, portable and battery-powered products, and FPGA and ASIC applications.
- What is the input supply range for the TPS3808G25DBVTG4?
The input supply range is from 1.7 V to 6.5 V.
