Texas Instruments TPS389025QDSERQ1

Overview

TPS389025QDSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade voltage supervisor IC that monitors 2.5 V system rails with ±1% threshold accuracy (VITN = 2.40 V, VITP = 2.414 V), asserts an open-drain RESET signal on undervoltage or manual reset, and supports user-programmable delay from 25 µs to 30 s via external CT capacitor - deployed in ADAS camera power sequencing and infotainment head unit supply monitoring.

For engineers reviewing the TPS389025QDSERQ1 datasheet, TPS389025QDSERQ1 pinout, TPS389025QDSERQ1 application, or TPS389025QDSERQ1 equivalent, key selection criteria include its 2.1 µA quiescent current, –40°C to +125°C operating range, WSON-6 package, precision hysteresis (0.325–0.825%), and MR/SENSE/RESET timing behavior under automotive transient conditions.

Technical Context

The TPS389025QDSERQ1 implements a precision bandgap reference and comparator architecture to achieve 1% fixed-threshold accuracy across temperature, with separate negative (VITN) and positive (VITP) thresholds enabling clean reset assertion/deassertion hysteresis. Its CT pin uses a 1.15 µA internal current source charging a user-supplied capacitor to set the rising-edge RESET delay time.

It operates from 1.5 V to 5.5 V supply, accepts SENSE inputs up to 5.5 V independent of VDD, features glitch immunity (≥9 µs at 5% overdrive), and includes undervoltage lockout (VPOR = 0.8 V) to ensure valid operation during power ramp-up.

Key Specifications

Pinout & Package

TPS389025QDSERQ1 is housed in a thermally enhanced 6-pin WSON (DSE) package with 0.5 mm pitch, exposed thermal pad, and nominal body size 1.50 mm × 1.50 mm.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar voltage supervisor applications.

Compared with TPS389030QDSERQ1 and TPS389018QDSERQ1, the TPS389025QDSERQ1 provides optimal threshold alignment for 2.5 V supplies-avoiding accuracy loss from external resistor scaling while maintaining identical ultra-low IQ, timing flexibility, and AEC-Q100 qualification.

Availability

TPS389025QDSERQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS camera, and digital cluster applications requiring stable component supply, long-term lifecycle support, and AEC-Q100-compliant sourcing.

Supply support for TPS389025QDSERQ1 includes scheduled delivery planning, volume procurement assistance, BOM continuity management, traceable sourcing, and lifecycle availability coordination for OEM customers, industrial embedded developers, connected-device designers, and electronics production programs.

Manufacturer

Texas Instruments is a global semiconductor company delivering analog and embedded processing solutions, with leadership in automotive, industrial, and power management technologies.

The TPS3890-Q1 product line delivers ultra-low-power, high-accuracy voltage supervisors specifically engineered for automotive power-rail monitoring, featuring programmable delay and AEC-Q100 qualification for safety-critical ECUs.

FAQ

What is the exact threshold voltage specification for TPS389025QDSERQ1?

The TPS389025QDSERQ1 has a factory-set negative threshold voltage (VITN) of 2.40 V and positive threshold voltage (VITP) of 2.414 V, with maximum ±1% accuracy over –40°C to +125°C. This 0.575% hysteresis ensures robust noise rejection on 2.5 V rails without external components. The TPS389025QDSERQ1 does not require resistor dividers for standard 2.5 V monitoring.

How is the reset delay time configured on TPS389025QDSERQ1?

The TPS389025QDSERQ1 uses its CT pin to set the rising-edge RESET delay time (tPD(r)) by connecting an external capacitor to ground. The relationship is tPD(r) = CCT × 1.07 + 25 µs, where CCT is in µF. For example, a 10 µF capacitor yields ~10.7 ms delay. The TPS389025QDSERQ1's 1.15 µA CT current minimizes leakage-induced timing error.

Can TPS389025QDSERQ1 monitor voltages other than 2.5 V?

The TPS389025QDSERQ1 is factory-configured for 2.5 V rail supervision and cannot be adjusted to other thresholds. To monitor different rails (e.g., 1.8 V or 3.3 V), select the corresponding variant: TPS389018QDSERQ1 or TPS389033QDSERQ1. The TPS389025QDSERQ1's fixed threshold eliminates calibration but requires correct part selection per target voltage.

What package type and dimensions does TPS389025QDSERQ1 use?

The TPS389025QDSERQ1 is packaged in a 6-pin WSON (DSE) package with nominal body size 1.50 mm × 1.50 mm and 0.5 mm pitch. It includes an exposed thermal pad for improved heat dissipation in automotive under-hood environments. The TPS389025QDSERQ1's compact footprint supports high-density PCB layouts in space-constrained ECUs.

Is TPS389025QDSERQ1 compatible with 1.8 V or 3.3 V logic interfaces?

Yes - the TPS389025QDSERQ1's open-drain RESET output can be pulled up to any voltage from 1.5 V to 5.5 V, independent of its VDD supply. This allows direct interfacing with 1.8 V microcontrollers (using 1.8 V pullup) or 3.3 V FPGAs (using 3.3 V pullup), while the TPS389025QDSERQ1 itself may operate from 2.5 V or 3.3 V VDD.