Overview
The TPS3808G09DBVRG4 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 reset signal when the voltage drops below a preset threshold or when the manual reset pin is triggered. It is particularly useful in applications requiring precise voltage monitoring and low power consumption.
Key Specifications
| Parameter | Value | Conditions |
|---|---|---|
| Nominal Supply Voltage | 0.9 V | |
| Threshold Voltage (VIT) | 0.84 V | |
| Quiescent Current (IDD) | 2.4 μA typical | VDD = 3.3 V, RESET not asserted, MR, RESET, CT open |
| Low-level Output Voltage (VOL) | 0.4 V | 1.8 V ≤ VDD ≤ 6.5 V, IOL = 1 mA |
| Power-up Reset Voltage (VPOR) | 0.8 V | VOL (max) = 0.2 V, I_RESET = 15 μA |
| Threshold Accuracy | ±0.5% typical | VIT ≤ 3.3 V |
| Temperature Range | –40°C to 125°C | |
| Package | SOT-23 (DBV) | |
| Reset Delay Time | 20 ms to 10 s | User-adjustable |
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 TPS3808G09DBVRG4?
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 pin is triggered.
- What is the nominal supply voltage for the TPS3808G09DBVRG4?
The nominal supply voltage is 0.9 V.
- What is the typical quiescent current of the TPS3808G09DBVRG4?
The typical quiescent current is 2.4 μA.
- What is the threshold accuracy of the TPS3808G09DBVRG4?
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 set to 20 ms by disconnecting the CT pin, 300 ms by connecting the CT pin to VDD, or user-adjusted between 1.25 ms and 10 s by connecting the CT pin to an external capacitor.
- What are the available package types for the TPS3808G09DBVRG4?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the operating temperature range of the TPS3808G09DBVRG4?
The operating temperature range is –40°C to 125°C.
- Can the threshold voltage be adjusted?
- What types of applications is the TPS3808G09DBVRG4 suitable for?
- Does the TPS3808G09DBVRG4 have a manual reset feature?
- What is the type of the RESET output?
The RESET output is open-drain.
