Texas Instruments TPS389006ADJRTERQ1

Overview

TPS389006ADJRTERQ1 from Texas Instruments is an ASIL-D functional safety-compliant, six-channel I²C-programmable window voltage supervisor with two remote sense inputs, ±6 mV threshold accuracy (–40°C to +125°C), 2.5 V to 5.5 V input range, and 200 µA standby current - deployed in automotive ADAS power-rail monitoring for SOC core supply integrity.

For engineers reviewing the TPS389006ADJRTERQ1 datasheet, TPS389006ADJRTERQ1 pinout, TPS389006ADJRTERQ1 application, or TPS389006ADJRTERQ1 equivalent, this page delivers verified pin functions, real-world rail-tagging timing behavior, I²C-configurable glitch immunity, and ASIL-D hardware/systematic capability evidence per ISO 26262.

Technical Context

The TPS389006ADJRTERQ1 implements six independent high-accuracy SVS comparators with programmable 5 mV/20 mV threshold steps, dual remote sense inputs (RS_1/2) for PCB trace-drop compensation on high-current rails, and integrated 8-bit ADC for low-frequency voltage telemetry. It supports I²C Fast Mode Plus (1 MHz) with CRC and PEC error checking.

Its fault detection architecture separates high-frequency (HF) and low-frequency (LF) events: HF faults trigger NIRQ within 650 ns (1× mode), while LF faults use ADC sampling at 125 ksps with configurable LPF cutoff (250 Hz–4 kHz). Sequence logging timestamps power-rail transitions with 50 µs resolution and ±5% accuracy using the SYNC pin for multi-device rail tagging.

Key Specifications

Pinout & Package

TPS389006ADJRTERQ1 uses a 16-pin WQFN (RTE) package with 3 mm × 3 mm body size and exposed thermal pad (Pin 17, GND). Pin functions are validated per TI SNVSBM4D Rev. O (Oct 2024).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS389R06ADJRTERQ1, the TPS389006ADJRTERQ1 removes the NRST pin to reduce complexity in interrupt-driven architectures; versus TPS388006ADJRTERQ1, it delivers full ASIL-D capability, six channels, remote sensing, and rail-tagging - making it the only option for SIL-3 compliant ADAS power monitoring.

Availability

TPS389006ADJRTERQ1 is available at Aetrix Electronics and suitable for advanced driver assistance systems (ADAS), sensor fusion ECUs, and electric power steering (EPS) control modules requiring stable component supply, long-term automotive qualification, and ASIL-D functional safety compliance.

Supply support for TPS389006ADJRTERQ1 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 AEC-Q100 qualification experience and ISO 26262 functional safety expertise.

The TPS389006ADJRTERQ1 belongs to TI's ASIL-D-certified multichannel supervisor family, engineered specifically for automotive safety-critical power-rail monitoring in ADAS, automated driving, and electrification systems where deterministic fault response and audit-ready safety documentation are mandatory.

FAQ

What is the maximum I²C clock frequency supported by the TPS389006ADJRTERQ1?

The TPS389006ADJRTERQ1 supports I²C Fast Mode Plus operation up to 1 MHz, enabling rapid reconfiguration of voltage thresholds, reset delays, and glitch filter settings during system runtime. This capability is validated per TI SNVSBM4D Rev. O, with timing parameters including tLOW = 0.5 µs and trDA = 120 ns for Fast Mode Plus. The interface includes CRC and PEC for error-resilient communication in noisy automotive environments.

Does the TPS389006ADJRTERQ1 require external resistors to set overvoltage and undervoltage thresholds?

No, the TPS389006ADJRTERQ1 integrates precision on-die resistor networks for all OV/UV threshold generation, eliminating the need for external resistor dividers. This design removes BOM cost, layout sensitivity, and accuracy degradation from external component tolerances - delivering ±6 mV threshold accuracy over –40°C to +125°C without calibration or trimming. Thresholds are programmable in 5 mV steps (0.2–1.475 V) or 20 mV steps (0.8–5.5 V) via I²C.

How does the remote sense feature (RS_1/2) improve voltage monitoring accuracy in the TPS389006ADJRTERQ1?

The RS_1/2 pins on the TPS389006ADJRTERQ1 enable direct measurement at the load point of high-current rails, compensating for voltage drop across PCB traces and connectors. With ±100 mV remote sense range and integration into the same high-accuracy SVS comparator chain as MONx inputs, it ensures ±6 mV total measurement uncertainty - critical for monitoring SOC core supplies where even 20 mV IR drop would cause false undervoltage trips under peak load.

What functional safety documentation is provided for the TPS389006ADJRTERQ1?

Texas Instruments provides comprehensive ISO 26262 documentation for the TPS389006ADJRTERQ1, including a safety manual, FMEDA report, safety analysis summary, and hardware/software safety requirements specification - all targeting ASIL-D compliance. These documents support systematic development processes and are referenced in TI's SNVSBM4D datasheet Rev. O. No additional third-party certification is required to claim ASIL-D capability when used per TI's safety guidelines.

Can the TPS389006ADJRTERQ1 perform power-rail sequencing across multiple devices?

Yes, the TPS389006ADJRTERQ1 supports synchronized rail tagging and sequence logging across multiple devices using its dedicated SYNC pin. When ACT or SLEEP transitions occur, the device timestamps rail activation/deactivation events with 50 µs resolution and ±5% accuracy. Multiple TPS389006ADJRTERQ1 units can be daisy-chained via SYNC to coordinate and log the exact order and timing of power-rail startups - essential for validating complex multi-SoC automotive systems.