Texas Instruments TPS389033KQDSERQ1

Overview

TPS389033KQDSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade voltage supervisor IC that monitors 3.3 V system rails with ±0.5% threshold accuracy (VITN = 2.93 V, VITP = 2.947 V), asserts open-drain RESET on undervoltage or manual reset, and supports user-programmable delay from 25 µs to 30 s via external CT capacitor - deployed in ADAS cameras and infotainment head units for reliable power-on reset sequencing.

For engineers reviewing the TPS389033KQDSERQ1 datasheet, TPS389033KQDSERQ1 pinout, TPS389033KQDSERQ1 application, or TPS389033KQDSERQ1 equivalent, key selection criteria include its 2.1 µA quiescent current, –40°C to +125°C operating range, 1.5-mm × 1.5-mm WSON-6 package, precision hysteresis (0.325–0.825%), and MR/SENSE/RESET timing behavior under automotive transients.

Technical Context

The TPS389033KQDSERQ1 implements a precision bandgap reference and comparator architecture to achieve 1% max 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 hold RESET asserted during brown-in conditions - all qualified per AEC-Q100 Grade 1 for automotive safety-critical subsystems.

Key Specifications

Pinout & Package

TPS389033KQDSERQ1 is housed in a 1.5-mm × 1.5-mm, 6-pin WSON package with wettable flanks, optimized for automated optical inspection and high-density automotive PCB layouts.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS389033-Q1 and TLV809E33DBVRQ1, the TPS389033KQDSERQ1 delivers superior threshold precision (±0.5% vs ±1%), field-programmable reset timing, and automotive-grade MR functionality - making it the only option qualified for ASIL-B–aligned ADAS and cluster applications requiring deterministic fault response.

Availability

TPS389033KQDSERQ1 is available at Aetrix Electronics and suitable for infotainment head units, ADAS camera modules, hybrid digital clusters, and automotive gateways requiring stable component supply across extended automotive lifecycles.

Supply support for TPS389033KQDSERQ1 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 leader specializing in analog, embedded processing, and automotive ICs, with decades of automotive qualification expertise and ISO/TS 16949-certified manufacturing.

The TPS3890-Q1 product line delivers ultra-low-power, high-accuracy voltage supervision for automotive ECUs - designed specifically for ASIL-B–capable power management in ADAS, infotainment, and body control modules.

FAQ

What is the exact negative threshold voltage (VITN) for TPS389033KQDSERQ1?

The TPS389033KQDSERQ1 has a factory-trimmed negative threshold voltage (VITN) of 2.93 V with ±0.5% accuracy over –40°C to +125°C. This value is specific to the "K" variant in the TPS3890-Q1 family and is documented in the Device Comparison Table of the SBVS303B datasheet. The TPS389033KQDSERQ1 uses this precise threshold to supervise 3.3 V rails with guaranteed margin against undervoltage faults.

Does TPS389033KQDSERQ1 support manual reset functionality?

Yes, the TPS389033KQDSERQ1 includes a dedicated MR (manual reset) input (Pin 3) that asserts the open-drain RESET output when driven low. This allows external microcontrollers or logic circuits to initiate a system reset independently of the SENSE voltage condition. The MR pin has defined VIH/VIL thresholds (0.7×VDD / 0.25×VDD) and 100 ns glitch immunity, making it robust for automotive control signaling.

What package type and dimensions does TPS389033KQDSERQ1 use?

The TPS389033KQDSERQ1 is packaged in a 6-pin WSON (DSE) package with nominal body size 1.5 mm × 1.5 mm and 0.5 mm pitch. It features wettable flanks for automated optical inspection and complies with JEDEC MO-229 standards. This compact, thermally efficient package supports high-density routing in space-constrained automotive PCBs such as camera modules and instrument clusters.

How is the reset delay time programmed on TPS389033KQDSERQ1?

The reset delay time on TPS389033KQDSERQ1 is set by connecting an external capacitor between the CT pin (Pin 5) and GND. The device uses a 1.15 µA internal current source to charge the capacitor; delay time follows tPD(r) = CCT × 1.07 + 25 µs (nominal). Capacitor values from 0 µF (25 µs min) to 26 µF (30 s max) are supported, enabling precise alignment with MCU startup timing requirements.

Is TPS389033KQDSERQ1 qualified for automotive applications?

Yes, the TPS389033KQDSERQ1 is AEC-Q100 qualified Grade 1 (–40°C to +125°C ambient), with HBM ESD rating ±2000 V and CDM rating ±750 V. It is explicitly designed for automotive use cases including infotainment, ADAS cameras, digital clusters, and gateways - and carries the "-Q1" suffix denoting TI's automotive qualification program compliance.