Texas Instruments TPS62872N0QWRXSRQ1

Overview

TPS62872N0QWRXSRQ1 from Texas Instruments is an AEC-Q100 Grade 1 (–40°C to +125°C) automotive synchronous step-down DC/DC converter delivering 12A continuous output current, supporting 2.7V–6V input, ±1% output voltage accuracy with differential remote sensing, and resistor-selectable switching frequencies of 1.5/2.25/2.5/3.0 MHz - designed for FPGA, ASIC, and DDR memory core supplies in ADAS and infotainment systems.

For engineers reviewing the TPS62872N0QWRXSRQ1 datasheet, TPS62872N0QWRXSRQ1 pinout, TPS62872N0QWRXSRQ1 application, or TPS62872N0QWRXSRQ1 equivalent, key selection criteria include its non-I²C variant configuration (SDA/SCL tied to GND), fixed 0.875V startup voltage, forced-PWM/power-save mode control via MODE/SYNC, and stackability for higher-current rail designs without I²C bus overhead.

Technical Context

The TPS62872N0QWRXSRQ1 implements a fixed-frequency DCS-Control topology optimized for fast load transients and low output voltage ripple, with internal 7mΩ high-side and 4.5mΩ low-side MOSFETs enabling high efficiency at elevated ambient temperatures. Its differential remote sensing (VOSNS/GOSNS) ensures point-of-load regulation stability under dynamic current conditions.

This variant lacks I²C functionality: SDA and SCL pins are internally deactivated and must be externally tied to GND; startup voltage is fixed at 0.875V via VSEL shorted to VIN; spread-spectrum clocking is enabled by default; and soft-start time is 0.5 ms - distinguishing it from I²C-enabled family members while retaining full stackability and thermal warning/shutdown features.

Key Specifications

Pinout & Package

TPS62872N0QWRXSRQ1 uses the 16-pin RXS VQFN package (2.55mm × 3.55mm, 0.4mm pitch, wettable flanks), with an exposed thermal pad requiring solder connection to GND for thermal and mechanical integrity.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar automotive step-down converter applications.

Compared with TPS62872Y1QWRXSRQ1, the TPS62872N0QWRXSRQ1 trades programmability for simplified layout and lower system-level validation effort; versus LM61480QRJNRQ1, it delivers superior accuracy, stackability, and transient performance at the expense of narrower input range.

Availability

TPS62872N0QWRXSRQ1 is available at Aetrix Electronics and suitable for automotive ADAS sensor modules, infotainment cluster processors, and DDR5 memory subsystems requiring stable component supply with AEC-Q100 qualification and long-term production support.

Supply support for TPS62872N0QWRXSRQ1 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 solutions with decades of functional safety and AEC-Q100 expertise.

The TPS6287x-Q1 product line was engineered specifically for high-current, low-voltage core supplies in safety-critical automotive electronics - emphasizing fast transient response, differential sensing, stackability, and robust thermal protection.

FAQ

What is the startup output voltage of TPS62872N0QWRXSRQ1, and how is it set?

The TPS62872N0QWRXSRQ1 has a fixed startup output voltage of 0.875V, determined by connecting the VSEL pin directly to VIN as specified in Table 4-2. This eliminates the need for external resistors, ensures deterministic boot behavior, and simplifies design for applications where voltage flexibility is not required. The 0.875V setting aligns with common FPGA and ASIC core voltage requirements.

Does TPS62872N0QWRXSRQ1 support stacking with other devices, and what are the constraints?

Yes, TPS62872N0QWRXSRQ1 supports stacking with identical-current devices (e.g., another TPS62872N0QWRXSRQ1) to deliver up to 24A. All stacked devices must share the same current rating, have synchronized MODE/SYNC signals, and interconnect COMP, EN, PG, and SYNC_OUT pins as defined in Section 7.3.17. SDA/SCL pins must remain tied to GND in all units.

How does the absence of I²C functionality affect the usage of TPS62872N0QWRXSRQ1 compared to I²C variants?

The TPS62872N0QWRXSRQ1 omits I²C functionality: SDA and SCL pins are internally disabled and must be externally tied to GND. Factory-configured defaults apply - including fixed 0.875V startup, enabled spread-spectrum, and 0.5ms soft-start - removing runtime programmability but reducing layout complexity, BOM count, and firmware dependencies.

What thermal protection features does TPS62872N0QWRXSRQ1 provide, and how do they operate?

TPS62872N0QWRXSRQ1 provides thermal warning at 150°C junction temperature and thermal shutdown at 170°C, both with 20°C hysteresis. The thermal warning signal can be monitored by a system microcontroller to initiate throttling, while shutdown forces a safe power-down. These thresholds are silicon-trimmed and require no external components.

What package type and assembly requirements apply to TPS62872N0QWRXSRQ1?

TPS62872N0QWRXSRQ1 uses the 16-pin RXS VQFN package (2.55mm × 3.55mm × 1mm) with wettable flanks and an exposed thermal pad. The thermal pad must be soldered to a GND plane for thermal performance and mechanical reliability. Wettable flanks enable automated optical inspection (AOI) of all solder joints - a requirement for automotive PPAP compliance.