Texas Instruments TPS389030QDSERQ1

Overview

TPS389030QDSERQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-grade voltage supervisor IC that monitors 3.0 V system rails with ±1% threshold accuracy (VITN = 2.89 V, VITP = 2.907 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 capacitor on CT pin - used in ADAS camera power sequencing and infotainment head unit POR management.

For engineers reviewing the TPS389030QDSERQ1 datasheet, TPS389030QDSERQ1 pinout, TPS389030QDSERQ1 application, or TPS389030QDSERQ1 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 compatibility with 1.5–5.5 V supply rails.

Technical Context

The TPS389030QDSERQ1 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 robust hysteresis control. Its CT pin uses a 1.15 µA internal current source charging a user-selected capacitor to generate programmable reset delay time.

It features dual reset triggers: SENSE input monitoring (0–5.5 V rail-independent) and MR input for system-initiated reset. The open-drain RESET output supports pull-up to any voltage ≤5.5 V, independent of VDD, enabling flexible interface voltage translation in multi-rail automotive systems.

Key Specifications

Pinout & Package

TPS389030QDSERQ1 is housed in a 6-pin WSON package (1.5 mm × 1.5 mm, 0.5 mm pitch) with wettable flanks, optimized for automated optical inspection (AOI) and high-reliability automotive solder joints.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS389030QDSERQ1, TPS389033QDSERQ1 offers identical functionality for 3.3 V rails but cannot monitor 3.0 V directly, while TLV809E30DBVR sacrifices programmable delay and MR capability for smaller size and lower cost - making TPS389030QDSERQ1 optimal for flexible, timing-critical automotive supervision.

Availability

TPS389030QDSERQ1 is available at Aetrix Electronics and suitable for infotainment head units, ADAS camera modules, and hybrid digital clusters requiring stable component supply under AEC-Q100 automotive qualification.

Supply support for TPS389030QDSERQ1 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 specializing in analog and embedded processing technologies, with leadership in automotive, industrial, and power management ICs.

The TPS3890-Q1 product line delivers ultra-low-power, AEC-Q100-qualified voltage supervisors for automotive power sequencing, POR generation, and system-level reset coordination in safety-critical ECUs.

FAQ

What is the exact threshold voltage specification for TPS389030QDSERQ1?

The TPS389030QDSERQ1 has a factory-set negative threshold voltage (VITN) of 2.89 V and positive threshold voltage (VITP) of 2.907 V, with ±1% maximum accuracy over –40°C to +125°C. These values are fixed and do not require external resistor configuration, distinguishing it from the adjustable TPS389001-Q1 variant. The 0.017 V hysteresis ensures noise immunity during rail transitions.

How is the reset delay time programmed on TPS389030QDSERQ1?

The reset delay time on TPS389030QDSERQ1 is set by connecting an external capacitor between the CT pin and GND. Using the formula tPD(r) = CCT × 1.07 + 25 µs (nominal), a 100 nF capacitor yields ~107 µs delay, while a 22 µF capacitor achieves ~23.6 ms. The device uses a 1.15 µA internal current source to charge the capacitor, minimizing leakage sensitivity - ceramic capacitors are recommended.

Can TPS389030QDSERQ1 monitor voltages other than 3.0 V?

No - TPS389030QDSERQ1 is a fixed-threshold device calibrated specifically for 3.0 V rails (VITN = 2.89 V, VITP = 2.907 V). To monitor other voltages, select alternate variants like TPS389018QDSERQ1 (1.8 V), TPS389025QDSERQ1 (2.5 V), or the adjustable TPS389001QDSERQ1. Attempting to use TPS389030QDSERQ1 for non-3.0 V rails results in incorrect reset timing and potential system instability.

What is the minimum supply voltage required for TPS389030QDSERQ1 to operate correctly?

TPS389030QDSERQ1 requires a minimum VDD of 1.5 V to guarantee functional operation per specifications. Below 1.5 V, the device enters undervoltage lockout (UVLO), holding RESET low until VDD rises above VPOR (0.8 V typ). For reliable supervision of a 3.0 V rail, VDD must be ≥1.5 V - commonly supplied from a dedicated 3.3 V or 5 V LDO, not the monitored rail itself.

Does TPS389030QDSERQ1 support manual reset functionality?

Yes - TPS389030QDSERQ1 includes a dedicated MR (manual reset) input (Pin 3) that asserts RESET low when driven to logic low (≤0.25 × VDD). This allows external controllers (e.g., MCU GPIO or watchdog timer) to initiate system reset independently of SENSE voltage. When MR is inactive, it must be tied to VDD; floating MR is not permitted and may cause unpredictable behavior.