Texas Instruments TPS6281302QWRWYRQ1

Overview

TPS6281302QWRWYRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 3 A continuous output current, with fixed 0.8 V output voltage, 2.75 V–6 V input range, and adjustable switching frequency from 1.8 MHz to 4 MHz. It integrates active output discharge, power-good monitoring, and precise enable for rail sequencing in infotainment and ADAS power rails.

For engineers reviewing the TPS6281302QWRWYRQ1 datasheet, TPS6281302QWRWYRQ1 pinout, TPS6281302QWRWYRQ1 application, or TPS6281302QWRWYRQ1 equivalent, key selection criteria include its fixed 0.8 V output, 3 A capability at +125°C ambient, wettable-flank VQFN-9 package, and functional safety documentation support for ISO 26262-compliant systems.

Technical Context

The TPS6281302QWRWYRQ1 uses peak current mode control with internal compensation selectable via COMP/FSET resistor or logic level, enabling stable operation across 27–470 µF output capacitance. Its MODE/SYNC pin supports forced PWM or automatic PFM/PWM transition and external clock synchronization from 1.8 MHz to 4 MHz with ≤50 µs lock time.

It features a precision enable input (VIH = 1.06–1.15 V, VIL = 0.96–1.05 V) for user-defined UVLO and exact power-rail sequencing, plus a dedicated SS/TR pin enabling soft-start ramp control or voltage tracking with ±17 mV offset and unity gain for feedback regulation.

Key Specifications

Pinout & Package

The TPS6281302QWRWYRQ1 is housed in a 3 mm × 2 mm VQFN package with wettable flanks (RWY, 9-pin), 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 step-down converter applications.

Compared with TPS6281302QWRWYRQ1, TPS628130AQWRWYRQ1 offers identical performance at 1.2 V for non-core logic, while TPS628120MQWRWYRQ1 trades 33% current capacity and +1.0 V output for reduced BOM cost in secondary rails-neither is pin-compatible for direct 0.8 V replacement.

Availability

TPS6281302QWRWYRQ1 is available at Aetrix Electronics and suitable for infotainment head units, hybrid reconfigurable clusters, telematics control units, surround view ECUs, and external amplifier designs requiring stable component supply across automotive production lifecycles.

Supply support for TPS6281302QWRWYRQ1 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 over 50 years of innovation.

The TPS6281x-Q1 product line delivers high-efficiency, AEC-Q100-qualified DC/DC converters for safety-critical automotive subsystems-including infotainment, ADAS, and body electronics-where reliability, thermal robustness, and functional safety support are mandatory.

FAQ

What is the output voltage tolerance of the TPS6281302QWRWYRQ1 under PWM operation?

The TPS6281302QWRWYRQ1 guarantees ±1% output voltage accuracy in PWM mode across –40°C to +125°C ambient temperature and VIN ≥ VOUT + 1 V. This tight tolerance ensures reliable operation of sub-1 V processor cores without requiring post-regulation LDOs or complex calibration routines. The fixed 0.8 V reference is trimmed at wafer test and validated per AEC-Q100 stress requirements. TPS6281302QWRWYRQ1 maintains this specification even under full 3 A load and maximum junction temperature.

Does the TPS6281302QWRWYRQ1 support external clock synchronization, and what are the requirements?

Yes, the TPS6281302QWRWYRQ1 supports external clock synchronization via the MODE/SYNC pin across 1.8 MHz to 4 MHz, with ≤50 µs lock time. To enable synchronization, a resistor must be connected from COMP/FSET to GND-direct tie to VIN or GND disables sync capability. The external clock must have 20–80% duty cycle and meet VIH/VIL thresholds (1.1 V/0.3 V). Synchronization is edge-triggered (falling edge on MODE to rising edge on SW), enabling phase-shifted multi-rail designs. TPS6281302QWRWYRQ1 retains full functionality during sync transitions.

How does the TPS6281302QWRWYRQ1 handle undervoltage lockout and power sequencing?

The TPS6281302QWRWYRQ1 implements precise enable control with asymmetric thresholds: VIH(rising) = 1.06–1.15 V and VIL(falling) = 0.96–1.05 V, enabling user-defined UVLO using an external resistor divider on the EN pin. This allows sequencing multiple rails by cascading EN signals or delaying startup via RC networks. When EN is pulled low, shutdown current drops to ≤26 µA, and internal MOSFETs fully disable. TPS6281302QWRWYRQ1 also provides SS/TR pin tracking for coordinated ramp-up with other supplies-critical for SoC power integrity.

What thermal performance can be expected from the TPS6281302QWRWYRQ1 in a standard 2-layer automotive PCB?

In a standard 2-layer 1 oz copper PCB with 1 in² exposed thermal pad area, the TPS6281302QWRWYRQ1 achieves RθJA ≈ 71.1°C/W. At 3 A load and 5 V input, typical power dissipation is ~360 mW, resulting in ~25.6°C junction-to-ambient rise-well within the +150°C max TJ limit. With proper thermal vias under the exposed pad (≥6×0.3 mm), RθJB drops to 16.4°C/W, further improving margin. Derating is not required up to +125°C ambient per AEC-Q100 Grade 1. TPS6281302QWRWYRQ1 includes thermal shutdown at +170°C with 15°C hysteresis.

Is the TPS6281302QWRWYRQ1 compatible with ceramic output capacitors, and what minimum value is required?

Yes, the TPS6281302QWRWYRQ1 is optimized for low-ESR ceramic output capacitors. For its fixed 0.8 V output and 3 A rating, the minimum effective capacitance is 27 µF (for VOUT ≥ 3.3 V), 32 µF (for 1 V ≤ VOUT < 3.3 V), or 47 µF (for VOUT < 1 V)-all values account for DC bias derating. A typical design uses two 22 µF + one 10 µF X7R ceramics (total 54 µF effective). The COMP/FSET pin selects internal compensation to match capacitance range, ensuring stability without feedforward capacitors-though adding 10 pF improves transient response. TPS6281302QWRWYRQ1 supports up to 470 µF total COUT.