Texas Instruments TPS389033GQDSERQ1

Overview

TPS389033GQDSERQ1 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 = 3.06 V, VITP = 3.084 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. It operates from –40°C to +125°C and draws only 2.09 µA typical supply current at 3.3 V.

For engineers reviewing the TPS389033GQDSERQ1 datasheet, TPS389033GQDSERQ1 pinout, TPS389033GQDSERQ1 application, or TPS389033GQDSERQ1 equivalent, key selection criteria include its 1.5-mm × 1.5-mm WSON-6 package, precision hysteresis (0.325–0.825%), MR input compatibility with 0.25×VDD logic-low threshold, and guaranteed glitch immunity (≥9 µs on SENSE, ≥100 ns on MR) across automotive temperature range.

Technical Context

The TPS389033GQDSERQ1 implements a precision bandgap reference and comparator architecture to achieve 1% max threshold accuracy over –40°C to +125°C, with factory-trimmed fixed negative threshold (VITN = 3.06 V) and positive threshold (VITP = 3.084 V). Its CT pin uses a 1.15 µA internal current source charging a user-supplied capacitor to set rising-edge RESET delay time.

RESET assertion is triggered by either SENSE falling below VITN or MR pulled low; deassertion requires both SENSE > VITP and MR high, followed by the full CT-programmed delay. The open-drain output supports pullup to any rail ≤5.5 V independent of VDD, enabling flexible interface voltage translation in multi-rail systems.

Key Specifications

Pinout & Package

TPS389033GQDSERQ1 is housed in a 1.5-mm × 1.5-mm, 6-pin WSON package (DSE) with wettable flanks, optimized for automated optical inspection and thermal performance in space-constrained automotive PCBs.

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 TPS389033GQDSERQ1 offers the narrowest threshold margin (3.06 V) for early-detection 3.3 V supervision and unique CT-based delay configurability-critical for meeting diverse MCU boot timing requirements across automotive domains.

Availability

TPS389033GQDSERQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid/digital clusters, and ADAS camera modules requiring stable component supply with AEC-Q100 Grade 1 assurance and long-term automotive lifecycle support.

Supply support for TPS389033GQDSERQ1 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 designing analog, embedded processing, and connectivity technologies for automotive, industrial, and consumer markets.

The TPS3890-Q1 product line delivers ultra-low-power, high-accuracy voltage supervisors specifically engineered for automotive power-rail monitoring with programmable timing and AEC-Q100 qualification.

FAQ

What is the exact negative threshold voltage (VITN) for TPS389033GQDSERQ1?

The TPS389033GQDSERQ1 has a factory-trimmed negative threshold voltage (VITN) of 3.06 V with ±0.5% accuracy over –40°C to +125°C. This value is specific to the 'G' suffix variant and differs from the standard TPS389033-Q1 (3.17 V) and 'K' variant (2.93 V), enabling precise supervision of 3.3 V rails with intentional margin for transient droop.

Does TPS389033GQDSERQ1 support manual reset functionality?

Yes, TPS389033GQDSERQ1 includes a dedicated MR (manual reset) input (Pin 3) that asserts RESET when driven to a logic low (<0.25×VDD). This allows external controllers or safety MCUs to initiate system reset independently of the monitored SENSE voltage, supporting coordinated power management in multi-domain automotive ECUs.

What is the maximum external capacitor value supported on the CT pin of TPS389033GQDSERQ1?

The CT pin of TPS389033GQDSERQ1 supports external capacitors up to 26 µF, enabling RESET deassertion delays up to 30 seconds. The relationship is tPD(r) = CCT × 1.07 + 25 µs (nominal), using a 1.15 µA internal charge current. Ceramic capacitors are recommended to minimize leakage-induced timing error.

Can TPS389033GQDSERQ1 monitor voltages higher than its VDD supply?

Yes, the SENSE input (Pin 1) of TPS389033GQDSERQ1 accepts voltages from 0 V to 5.5 V regardless of VDD level (1.5–5.5 V), allowing it to supervise higher-voltage rails (e.g., 5 V or 3.3 V) while powered from a lower auxiliary supply. This enables flexible power-domain isolation in complex automotive architectures.

Is TPS389033GQDSERQ1 pin-compatible with other devices in the TPS3890-Q1 family?

Yes, all TPS3890-Q1 variants-including TPS389033GQDSERQ1-use the identical 6-pin WSON (DSE) package and share identical pin configuration (SENSE, GND, MR, VDD, CT, RESET). This allows drop-in replacement between threshold variants (e.g., 'G', 'K', 'Q1') without PCB layout changes, provided timing and threshold requirements align.