Texas Instruments TPS62873QWRXSRQ1

Overview

TPS62873QWRXSRQ1 from Texas Instruments is a 15A AEC-Q100 Grade-1 automotive synchronous step-down converter with I²C interface, differential remote sensing, and stackable architecture for high-current core supplies. It operates from 2.7V–6V input, delivers ±1% output accuracy across 0.4V–3.35V range, and integrates 7mΩ/4.5mΩ MOSFETs for high-efficiency operation up to 150°C junction temperature in infotainment and ADAS power rails.

For engineers reviewing the TPS62873QWRXSRQ1 datasheet, TPS62873QWRXSRQ1 pinout, TPS62873QWRXSRQ1 application, or TPS62873QWRXSRQ1 equivalent, key selection criteria include its 15A continuous output capability, resistor-selectable switching frequency (1.5–3.0MHz), I²C-configurable voltage scaling, thermal warning/PG monitoring, and validated stackability for >15A loads without external current-sharing circuitry.

Technical Context

The TPS62873QWRXSRQ1 implements a fixed-frequency DCS-Control topology optimized for fast transient response in processor core supplies, supporting both power-save and forced-PWM modes. Its differential remote sensing (VOSNS/GOSNS) enables point-of-load regulation with <±1% DC accuracy under all load and thermal conditions.

Stacked operation is hardware-synchronized via SYNC_OUT → MODE/SYNC daisy-chaining, with automatic primary/secondary role assignment using SYNC_OUT pull-down resistors. The I²C interface (up to 1MHz) provides real-time voltage/temperature monitoring, dynamic VOUT adjustment, and fault reporting - features absent in non-I²C variants like TPS62873N0QWRXSRQ1.

Key Specifications

Pinout & Package

TPS62873QWRXSRQ1 uses a 16-pin RXS VQFN package (2.55mm × 3.55mm, 0.5mm pitch) with exposed thermal pad soldered to GND for optimal thermal dissipation and mechanical stability.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar high-current automotive buck converter applications.

Compared with TPS62872QWRXSRQ1, the TPS62873QWRXSRQ1 delivers 25% higher current with lower conduction loss, enabling single-device 15A solutions; versus MPQ4436-AEC1, it adds I²C configurability, remote sensing, and integrated thermal safety - critical for ADAS and infotainment core rails.

Availability

TPS62873QWRXSRQ1 is available at Aetrix Electronics and suitable for automotive infotainment, ADAS domain controllers, and FPGA-based gateway modules requiring stable component supply with AEC-Q100 qualification and long-term production support.

Supply support for TPS62873QWRXSRQ1 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-grade power management ICs with decades of automotive qualification expertise.

The TPS6287x-Q1 product line was designed specifically for high-current, safety-critical automotive core supplies - integrating I²C telemetry, stackability, and AEC-Q100 Grade-1 operation to replace discrete multi-phase controllers in ADAS and digital cockpit systems.

FAQ

What is the maximum continuous output current of the TPS62873QWRXSRQ1?

The TPS62873QWRXSRQ1 delivers 15A continuous output current under recommended operating conditions (T_J ≤ 150°C, 2.7V–6V input). This rating is validated across –40°C to +125°C ambient with proper PCB thermal design per the RXS package's 28°C/W R_θJA on EVM layouts. Derating applies above 125°C ambient or with reduced copper area.

Does the TPS62873QWRXSRQ1 support differential remote sensing, and how is it implemented?

Yes, the TPS62873QWRXSRQ1 supports differential remote sensing via dedicated VOSNS and GOSNS pins. These inputs measure voltage directly at the load, rejecting PCB trace resistance errors. When properly routed to the load's power and ground planes, this feature ensures ±1% output accuracy regardless of current or board layout - a key advantage over single-point sensing regulators.

Can multiple TPS62873QWRXSRQ1 devices be stacked, and what is required for synchronization?

Yes, TPS62873QWRXSRQ1 devices support hardware-synchronized stacking. Connect SYNC_OUT of the primary device to MODE/SYNC of the secondary, tie all COMP, EN, and PG pins together, and configure one device as primary (SYNC_OUT floating) and others as secondary (47kΩ from SYNC_OUT to GND). No external clock or current-sharing components are needed.

What I²C functionality does the TPS62873QWRXSRQ1 provide, and what is its address?

The TPS62873QWRXSRQ1 uses I²C address 0x43 (7-bit) for voltage monitoring, thermal status readback, dynamic VOUT adjustment, and fault flag interrogation. It supports standard/fast/fast-plus modes up to 1MHz. Address is factory-fixed and linked to the VSEL configuration - no software reassignment is possible.

What are the thermal protection thresholds for the TPS62873QWRXSRQ1?

The TPS62873QWRXSRQ1 asserts thermal warning at 150°C junction temperature (with 20°C hysteresis) and initiates thermal shutdown at 170°C (also with 20°C hysteresis). Both thresholds are monitored internally and reported via I²C register bits and the open-drain PG pin, enabling system-level thermal management without external sensors.