Overview
The TPS3808G01DRVR is a microprocessor supervisory circuit produced by Texas Instruments. This device is 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 TPS3808 family is known for its low quiescent current, high threshold accuracy, and adjustable delay times, making it suitable for a wide range of applications, particularly in battery-powered and low-power systems.
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 | 2.4 | 5 | μA |
| VOL (Low-level output voltage) | 1.3 V ≤ VDD < 1.8 V, IOL = 0.4 mA | 0.3 | V | ||
| VIT (Negative-going input threshold accuracy) | VIT ≤ 3.3 V | –1.5% | ±0.5% | 1.5% | % |
| VHYS (Hysteresis on VIT pin) | TPS3808G01 | 1.5% | 3% | % | |
| R_MR (MR Internal pullup resistance) | 70 | 90 | kΩ | ||
| ISENSE (Input current at SENSE pin) | VSENSE = VIT | –25 | 25 | nA | |
| Temperature range | –40°C | 125°C | °C | ||
| Package | 6-WDFN Exposed Pad, SOT-23, 2-mm × 2-mm WSON |
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
- User-adjustable reset delay time using an external capacitor
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 TPS3808G01DRVR?
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 TPS3808G01DRVR?
The typical quiescent current is 2.4 μA.
- What is the range of adjustable delay times for the RESET signal?
The delay time can be adjusted from 1.25 ms to 10 s using an external capacitor.
- What are the available package types for the TPS3808G01DRVR?
The available packages are 6-WDFN Exposed Pad, SOT-23, and 2-mm × 2-mm WSON.
- What is the operating temperature range of the TPS3808G01DRVR?
The operating temperature range is –40°C to 125°C.
- How can the reset delay time be set?
The reset delay time can be set by connecting the CT pin to VDD, leaving it open, or using an external capacitor.
- What is the threshold accuracy for VIT ≤ 3.3 V?
The threshold accuracy is ±0.5% typical for VIT ≤ 3.3 V.
- Can the TPS3808G01DRVR monitor any voltage rail down to 0.405 V?
- What is the purpose of the MR (manual reset) input?
The MR input allows for manual assertion of the RESET signal by driving the MR pin low.
- What type of output does the RESET pin have?
The RESET output is open-drain.
