Overview
The TPS3808G30QDBVRQ1 is a low-quiescent-current programmable-delay 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 pin is driven low. It is particularly suited for automotive and industrial applications where precise voltage monitoring and control are critical for system functionality and safety.
The TPS3808G30QDBVRQ1 is part of the TPS3808-Q1 family, which is qualified for automotive applications and adheres to stringent quality standards. It features a small SOT-23 package, making it ideal for space-constrained designs.
Key Specifications
| Parameter | Description |
|---|---|
| Manufacturer | Texas Instruments |
| Part Number | TPS3808G30QDBVRQ1 |
| Package | SOT-23 (DBV), 6 pins |
| Operating Temperature Range | –40°C to 125°C |
| Input Supply Range | 1.8 V to 6.5 V |
| Quiescent Current | 2.4 μA (typical) |
| Threshold Accuracy | 0.5% (typical for VIT ≤ 3.3 V) |
| Reset Delay Time | Adjustable: 1.25 ms to 10 s |
| Manual Reset (MR) Input | Logic low (0.3 VDD) to assert reset |
| RESET Output | Open-drain |
Key Features
- Qualified for automotive applications with stringent quality standards
- 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 1.2 V to 5 V and adjustable voltage down to 0.4 V
- Manual Reset (MR) Input for external reset initiation
- Open-drain RESET output
- Small SOT-23 package suitable for space-constrained applications
Applications
The TPS3808G30QDBVRQ1 is suitable for a wide range of applications, particularly in:
- Automotive systems: Ensures reliable operation and safety by monitoring critical voltage levels.
- Industrial systems: Monitors and controls voltage levels in industrial equipment to maintain system integrity.
- Battery-powered devices: The low quiescent current makes it ideal for battery-powered applications.
- Embedded systems: Provides precise voltage monitoring and reset capabilities for microprocessors and other embedded systems.
Q & A
- What is the primary function of the TPS3808G30QDBVRQ1?
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 driven low.
- What package type and pin count does the TPS3808G30QDBVRQ1 come in?
The device comes in a SOT-23 (DBV) package with 6 pins.
- What is the operating temperature range of the TPS3808G30QDBVRQ1?
The operating temperature range is –40°C to 125°C.
- 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 user-adjusted from 1.25 ms to 10 s by connecting the CT pin to an external capacitor.
- What is the typical quiescent current of the TPS3808G30QDBVRQ1?
The typical quiescent current is 2.4 μA.
- What is the threshold accuracy of the TPS3808G30QDBVRQ1?
The threshold accuracy is 0.5% (typical for VIT ≤ 3.3 V).
- Can the TPS3808G30QDBVRQ1 be used in automotive applications?
Yes, it is qualified for automotive applications and adheres to stringent quality standards.
- How does the manual reset (MR) input work?
A logic low (0.3 VDD) on the MR input causes the RESET signal to be asserted. After MR returns to a logic high and the SENSE voltage is above its threshold, the RESET signal is deasserted after the user-defined reset delay expires.
- What type of output does the RESET pin have?
The RESET output is open-drain.
- Is the TPS3808G30QDBVRQ1 suitable for battery-powered applications?
Yes, due to its very low quiescent current, it is well-suited for battery-powered applications.
