Overview
The TPS3808G12DRVT is a high-precision programmable delay supervisor from Texas Instruments. This advanced supervisory circuit is designed to provide reliable monitoring of voltage supplies in digital systems, ensuring that microprocessors, FPGAs, and other sensitive digital circuitry operate within safe voltage thresholds. It enhances system reliability and prevents damage due to undesirable voltage conditions. The device is available in a small 6-pin SOT-23 package, making it ideal for space-constrained applications.
Key Specifications
| Parameter | Min | Typ | Max | Unit |
|---|---|---|---|---|
| Input Supply Range | 1.7 | - | 6.5 | V |
| Supply Current (VDD = 3.3 V, RESET not asserted) | 2.4 | 5 | μA | |
| Low-Level Output Voltage (IOL = 1 mA) | 0.4 | - | - | V |
| Power-Up Reset Voltage | 0.8 | - | - | V |
| Negative-Going Input Threshold Accuracy (VIT ≤ 3.3 V) | -1.5% | ±0.5% | 1.5% | % |
| Temperature Range | -40°C | - | 125°C | °C |
| Package Type | SOT-23 (6-pin) | - | - | - |
| Body Size (Nominal) | 2.90 mm x 1.60 mm | - | - | - |
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
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 TPS3808G12DRVT? 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 are the available package types for the TPS3808G12DRVT? The device is available in SOT-23 (6-pin) and 2-mm × 2-mm WSON packages.
- What is the range of the adjustable delay time for the power-on reset generator? The adjustable delay time ranges from 1.25 ms to 10 s.
- What is the typical quiescent current of the TPS3808G12DRVT? 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.
- How can the reset delay time be adjusted? The reset delay time can be adjusted by connecting the CT pin to VDD, leaving it open, or using an external capacitor.
- What is the temperature range for the TPS3808G12DRVT? The device is fully specified over a temperature range of –40°C to 125°C.
- Can the TPS3808G12DRVT monitor any voltage rail? Yes, it can monitor any voltage rail down to 0.405 V using an external resistor divider.
- What is the purpose of the manual reset (MR) input? The MR input allows for manual assertion of the RESET signal by driving it low.
- What type of output does the RESET pin have? The RESET pin has an open-drain output.
