Overview
The TPS3808G25DRVTG4 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 TPS3808G25DRVTG4 is particularly suited for applications requiring precise voltage monitoring and adjustable reset delay times.
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 | ||
| VOL Low-Level Output Voltage | 1.8 V ≤ VDD ≤ 6.5 V, IOL = 1 mA | 0.4 | V | ||
| VPOR Power-Up Reset Voltage | VOL (max) = 0.2 V, IRESET = 15 μA | 0.8 | V | ||
| VIT Negative-Going Input Threshold Accuracy | VIT ≤ 3.3 V | –1.5% | ±0.5% | 1.5% | % |
| VHYS Hysteresis on VIT Pin | Fixed versions | 1% | 2.5% | % | |
| R_MR MR Internal Pullup Resistance | 70 | 90 | kΩ | ||
| ISENSE Input Current at SENSE Pin | VSENSE = VIT | –25 | 25 | nA |
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 TPS3808G25DRVTG4?
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 range of the adjustable delay time for the reset signal?
The adjustable delay time ranges from 1.25 ms to 10 s.
- What is the typical quiescent current of the TPS3808G25DRVTG4?
The typical quiescent current is 2.4 μA.
- What is the threshold accuracy for VIT ≤ 3.3 V?
The threshold accuracy is ±0.5% typical for VIT ≤ 3.3 V.
- What are the available package types for the TPS3808G25DRVTG4?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the temperature range for the TPS3808G25DRVTG4?
The temperature range is –40°C to 125°C.
- 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 the CT pin to an external capacitor.
- 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.
- What type of output does the RESET pin provide?
The RESET output is an open-drain output.
- What are some common applications for the TPS3808G25DRVTG4?
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.
