Overview
The TPS389033KQDSERQ1 is a precision voltage supervisor from Texas Instruments, designed for low-quiescent current applications. This device is part of the TPS3890-Q1 family and is qualified for automotive use, meeting AEC-Q100 standards. It monitors system voltages as low as 1.15 V and asserts an open-drain RESET signal when the SENSE voltage drops below a preset threshold or when the manual reset (MR) pin is driven low. The RESET output remains low for a user-adjustable delay time after the conditions return above their respective thresholds. The device features high threshold accuracy of 1% and is available in a compact 1.5-mm × 1.5-mm WSON package, making it suitable for battery-powered and space-constrained applications.
Key Specifications
| Parameter | Description | Value |
|---|---|---|
| Package | WSON (DSE) | 6 pins |
| Operating Temperature Range | °C | -40 to 125 |
| Supply Voltage (VDD) | V | 1.5 to 5.5 |
| Threshold Voltage (VITN) | V | 2.93 V (for TPS389033K-Q1) |
| Threshold Accuracy | % | 1% (max) |
| Quiescent Current (IDD) | µA | 2.1 (typical) |
| Reset Delay Time | µs to s | 25 µs to 30 s (user-adjustable) |
| ESD Classification | HBM/CDM | Level 2 / C4B |
| Manual Reset (MR) Input | Logic low to assert RESET | |
| RESET Output | Open-drain |
Key Features
- Qualified for Automotive Applications with AEC-Q100 qualification.
- Power-On-Reset (POR) generator with adjustable delay time from 25 µs to 30 s.
- Very low supply current of 2.1 µA (typical).
- High threshold accuracy of 1% (max).
- Precision hysteresis.
- Fixed and adjustable threshold voltages, with fixed thresholds for standard rails from 1.2 V to 5 V and adjustable down to 1.15 V.
- Manual reset (MR) input.
- Open-drain RESET output.
- Compact 1.5-mm × 1.5-mm WSON package.
Applications
- Infotainment Head Unit
- Hybrid/Digital Cluster
- External Amplifier
- ADAS Camera
- Automotive Gateway
- Battery-powered and space-constrained applications.
Q & A
- What is the primary function of the TPS389033KQDSERQ1?
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 is the operating temperature range of the TPS389033KQDSERQ1?
The operating temperature range is -40°C to 125°C.
- What is the quiescent current of the TPS389033KQDSERQ1?
The quiescent current is 2.1 µA (typical).
- How is the reset delay time adjusted in the TPS389033KQDSERQ1?
The reset delay time can be adjusted by connecting an external capacitor to the CT pin, allowing a delay time from 25 µs to 30 s.
- What are the threshold voltage options for the TPS389033KQDSERQ1?
The device has a fixed threshold voltage of 2.93 V for the TPS389033K-Q1, and there are also adjustable versions available.
- What is the package type and size of the TPS389033KQDSERQ1?
The package type is WSON (DSE) with 6 pins, and the size is 1.5-mm × 1.5-mm.
- Is the TPS389033KQDSERQ1 qualified for automotive applications?
Yes, it is qualified for automotive applications and meets AEC-Q100 standards.
- What is the purpose of the manual reset (MR) input?
The manual reset (MR) input allows a processor or other logic circuits to initiate a reset by driving the MR pin low.
- What type of output does the RESET pin have?
The RESET output is open-drain.
- How accurate is the threshold voltage of the TPS389033KQDSERQ1?
The threshold voltage accuracy is 1% (max).
