Texas Instruments TPS628502QDRLRQ1

Overview

TPS628502QDRLRQ1 from Texas Instruments is an AEC-Q100 Grade 1 automotive synchronous step-down DC/DC converter delivering up to 2A continuous output current, operating from 2.7V–6V input, with 0.6V–5.5V adjustable output voltage, ±1% PWM output accuracy, and 17µA quiescent current - deployed in ADAS camera modules and surround-view ECUs.

For engineers reviewing the TPS628502QDRLRQ1 datasheet, TPS628502QDRLRQ1 pinout, TPS628502QDRLRQ1 application, or TPS628502QDRLRQ1 equivalent, key selection criteria include its SOT583 package footprint, 1.8MHz–4MHz externally adjustable switching frequency, forced-PWM/PFM mode flexibility, active output discharge, and power-good window comparator with 40µs deglitch timing.

Technical Context

The TPS628502QDRLRQ1 uses peak current mode control with internal compensation selectable via COMP/FSET pin resistor or logic state, enabling stable operation across 8µF–200µF output capacitance ranges. Its dual compensation settings optimize transient response for low-ESR ceramic capacitors while supporting both fixed-frequency PWM and automatic PFM-to-PWM transition.

It integrates a precise enable input (1.1V rising threshold) for user-defined UVLO and sequencing, a MODE/SYNC pin supporting external clock synchronization (1.8–4MHz), and a dedicated open-drain PG output with 92–98% rising / 87–93% falling VFB window detection - all qualified for –40°C to +125°C ambient operation.

Key Specifications

Pinout & Package

SOT583 (DRL) package: 2.10mm × 1.60mm body size (including pins), 0.47mm pitch, 8-pin surface-mount with exposed thermal pad - optimized for high-density automotive PCB layouts and thermal performance (RθJA = 60°C/W on EVM).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS628502QDRLRQ1, TPS62903QDRCRQ1 trades output current for ultra-low IQ and higher efficiency in lighter loads, while MPQ4436-AEC1 offers higher peak current but omits PG, SSC, and functional safety support - making TPS628502QDRLRQ1 optimal for ADAS SoC power where accuracy, EMI control, and safety compliance are mandatory.

Availability

TPS628502QDRLRQ1 is available at Aetrix Electronics and suitable for ADAS camera modules, surround-view ECUs, and hybrid instrument clusters requiring stable component supply, long-term automotive lifecycle support, and AEC-Q100-compliant traceability.

Supply support for TPS628502QDRLRQ1 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 and embedded processing technologies, with deep expertise in automotive power management ICs and functional safety design.

The TPS62850x-Q1 product line was engineered specifically for high-reliability automotive infotainment and ADAS applications, emphasizing low EMI, precise sequencing, and extended temperature operation in space-constrained modules.

FAQ

What is the maximum continuous output current of the TPS628502QDRLRQ1?

The TPS628502QDRLRQ1 delivers 2A continuous output current at junction temperatures up to 125°C. At 85°C junction temperature, it supports up to 3A peak current. This rating assumes proper PCB thermal design per the DRL package's RθJA = 60°C/W specification on an EVM layout with thermal vias.

Does the TPS628502QDRLRQ1 support external clock synchronization?

Yes, the TPS628502QDRLRQ1 supports external clock synchronization via the MODE/SYNC pin, accepting 1.8MHz–4MHz square-wave signals with 20–80% duty cycle. The internal PLL enables seamless transition between internal and external clocks without output disturbance, and synchronization occurs on the falling edge of the external clock.

How does the COMP/FSET pin configure switching frequency and compensation?

The COMP/FSET pin sets both switching frequency and internal compensation using either a resistor to GND (e.g., 4.5kΩ–10kΩ for 1.8–4MHz) or direct tie to VIN/GND for fixed 2.25MHz. Resistor value also selects one of two compensation settings - optimizing loop stability for output capacitance ranging from 8µF to 200µF based on VOUT level.

What is the purpose of the active output discharge feature in the TPS628502QDRLRQ1?

The active output discharge feature in the TPS628502QDRLRQ1 uses an internal 100Ω switch to rapidly discharge the output capacitor when the device is disabled. This prevents back-powering of downstream circuitry, ensures clean power-down sequencing, and eliminates residual voltage that could cause latch-up or false wake-up in adjacent logic.

Is the TPS628502QDRLRQ1 qualified for functional safety applications?

Yes, the TPS628502QDRLRQ1 is functional safety-capable with documentation available to support ISO 26262 ASIL-B system-level development. It includes diagnostic features such as power-good window comparator, thermal shutdown with hysteresis, and undervoltage lockout - all validated under AEC-Q100 Grade 1 conditions (–40°C to +125°C TA).