Overview
The TPS3808G50QDBVRCT, produced by Texas Instruments, is a low-quiescent current supervisor with programmable delay and manual reset capabilities. This device is part of the TPS3808 family of microprocessor supervisory circuits, designed to monitor system voltages and assert an open-drain RESET signal when the monitored voltage drops below a preset threshold or when the manual reset (MR) pin is triggered. The TPS3808 is particularly suited for battery-powered applications due to its very low typical quiescent current of 2.4 μA. It is available in SOT-23 and 2-mm × 2-mm WSON packages and is fully specified over a temperature range of –40°C to 125°C (TJ).
Key Specifications
| Parameter | Test Conditions | Min | Typ | Max | Unit |
|---|---|---|---|---|---|
| Supply Voltage Range | 1.7 | 6.5 | V | ||
| Threshold Voltage Range | 0.4 | 5.0 | V | ||
| Quiescent Current | VDD = 6.5 V, RESET not asserted, MR, RESET, CT open | 2.4 | μA | ||
| Reset Delay Time | CT = Open | 12 | 20 | 28 | ms |
| Reset Delay Time | CT = VDD | 180 | 300 | 420 | ms |
| Reset Delay Time | CT = 100 pF | 0.75 | 1.25 | 1.75 | s |
| Propagation Delay MR to RESET | VIH = 0.7 VDD, VIL = 0.3 VDD | 150 | ns | ||
| High-to-low level RESET delay | SENSE to RESET | 20 | μs | ||
| Package Types | SOT-23, WSON (6-pin) | ||||
| Operating Temperature Range | –40 | 125 | °C (TJ) |
Key Features
- Programmable Delay Time: 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 between 1.25 ms and 10 s by connecting the CT pin to an external capacitor.
- Low Quiescent Current: Typical quiescent current of 2.4 μA, making it suitable for battery-powered applications.
- Precision Threshold Accuracy: Achieves 0.5% threshold accuracy for VIT ≤ 3.3 V.
- Manual Reset Capability: The device asserts a RESET signal when the manual reset (MR) pin drops to a logic low.
- SENSE Input: Allows monitoring of any system voltage, with built-in hysteresis for smooth RESET assertions and de-assertions.
- Compact Packaging: Available in SOT-23 and 2-mm × 2-mm WSON packages.
Applications
- Battery-Powered Devices: Ideal for applications requiring low power consumption, such as portable electronics and IoT devices.
- Automotive Systems: Suitable for use in automotive systems due to its wide operating temperature range and low quiescent current.
- Embedded Systems: Used in various embedded systems where reliable voltage monitoring and reset capabilities are essential.
- Industrial Control Systems: Applicable in industrial control systems that require precise voltage monitoring and reset functions.
Q & A
- What is the typical quiescent current of the TPS3808G50QDBVRCT?
The typical quiescent current is 2.4 μA.
- How can the reset delay time be adjusted on the TPS3808G50QDBVRCT?
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 between 1.25 ms and 10 s by connecting the CT pin to an external capacitor.
- What is the operating temperature range of the TPS3808G50QDBVRCT?
The operating temperature range is –40°C to 125°C (TJ).
- What types of packages are available for the TPS3808G50QDBVRCT?
The device is available in SOT-23 and 2-mm × 2-mm WSON packages.
- What is the precision of the threshold voltage accuracy for VIT ≤ 3.3 V?
The threshold accuracy is 0.5% for VIT ≤ 3.3 V.
- Can the TPS3808G50QDBVRCT be used in automotive systems?
Yes, it is suitable for use in automotive systems due to its wide operating temperature range and low quiescent current.
- How does the SENSE input work on the TPS3808G50QDBVRCT?
The SENSE input allows monitoring of any system voltage, with built-in hysteresis for smooth RESET assertions and de-assertions.
- What is the purpose of the manual reset (MR) pin on the TPS3808G50QDBVRCT?
The manual reset (MR) pin asserts a RESET signal when it drops to a logic low.
- Can the TPS3808G50QDBVRCT be used in battery-powered devices?
Yes, it is well-suited for battery-powered applications due to its low quiescent current.
- What is the propagation delay from MR to RESET on the TPS3808G50QDBVRCT?
The propagation delay from MR to RESET is typically 150 ns.
