Texas Instruments TPS71525QDCKRM3Q1

Overview

TPS71525QDCKRM3Q1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator delivering fixed 2.5 V output at up to 50 mA, with 3.2 μA typical quiescent current, 2.5 V–24 V input range, and stable operation using ≥0.47 μF output capacitance in a 5-pin SC70 (DCK) package. It powers battery-sensitive microcontrollers in infotainment systems and body electronics.

For engineers reviewing the TPS71525QDCKRM3Q1 datasheet, TPS71525QDCKRM3Q1 pinout, TPS71525QDCKRM3Q1 application, or TPS71525QDCKRM3Q1 equivalent, key selection criteria include its ultra-low IQ across full load range (0–50 mA), dropout voltage of 415 mV at 50 mA, AEC-Q100 qualification, thermal performance (R_θJA = 195.7°C/W for new M3 chip), and SC70 footprint compatibility with space-constrained automotive PCBs.

Technical Context

The TPS71525QDCKRM3Q1 implements a CMOS pass transistor architecture with internal bandgap reference (1.205 V), leakage null control circuit active below 5 μA load, and brick-wall overcurrent protection limiting output to 125–350 mA depending on VIN and chip version. Its functional block includes feedback sensing, current limit detection, and soft-start circuitry to suppress inrush current during power-up.

It operates in two distinct modes: normal regulation (VIN ≥ VOUT + VDO) and dropout mode (VIN < VOUT + VDO), where output tracks input and transient response degrades significantly. The device supports both fixed-output (2.5 V) and adjustable variants, but TPS71525QDCKRM3Q1 is specifically the fixed 2.5 V version in DCK package with M3 process revision.

Key Specifications

Pinout & Package

TPS71525QDCKRM3Q1 uses the 5-pin SC70 (DCK) package, measuring 2.00 mm × 1.25 mm, optimized for high-density automotive PCB layouts. Pin 1 is NC (no connect), Pin 2 is GND, Pin 3 is NC, Pin 4 is IN, and Pin 5 is OUT - consistent with the fixed-output variant pin configuration per TI SGLS272I Rev I.

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar LDO regulator applications.

Compared with TPS71525QDCKRM3Q1, the TPS71533QDCKRM3Q1 offers identical form-factor and reliability but targets 3.3 V systems, while TLV71725PDQNR trades automotive qualification and input voltage margin for lower IQ and higher output current in a different package - making it unsuitable for under-hood deployment.

Availability

TPS71525QDCKRM3Q1 is available at Aetrix Electronics and suitable for hybrid/electric powertrain control units, automotive body electronics modules, and infotainment cluster subsystems requiring stable component supply with automotive-grade traceability and long-term lifecycle support.

Supply support for TPS71525QDCKRM3Q1 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 decades of automotive IC design expertise and broad AEC-Q100 product portfolio.

The TPS715-Q1 product line delivers ultra-low-IQ LDOs for battery-critical automotive subsystems, targeting extended sleep-mode operation in always-on ECUs such as telematics, ADAS sensors, and gateway controllers.

FAQ

What is the maximum input voltage rating for TPS71525QDCKRM3Q1?

The TPS71525QDCKRM3Q1 has an absolute maximum input voltage of 30 V for the new M3 chip revision, with recommended operating range of 2.5 V to 24 V. This 24 V upper limit ensures reliable operation during automotive load-dump events while maintaining regulation margin for the 2.5 V output. Exceeding 30 V risks permanent damage per Absolute Maximum Ratings.

Does TPS71525QDCKRM3Q1 require an input capacitor?

TPS71525QDCKRM3Q1 does not require an input capacitor for stability, but Texas Instruments recommends a 0.047 μF ceramic capacitor placed close to the IN pin to suppress high-frequency ringing caused by source inductance during load transients. This improves system-level robustness without impacting LDO regulation performance.

Is TPS71525QDCKRM3Q1 pin-compatible with earlier TPS71525QDCKRQ1 versions?

Yes, TPS71525QDCKRM3Q1 maintains identical 5-pin SC70 (DCK) mechanical footprint and pinout with legacy TPS71525QDCKRQ1, including NC pins at positions 1 and 3, GND at Pin 2, IN at Pin 4, and OUT at Pin 5. The M3 suffix denotes process revision with improved ESD ratings and tighter electrical specs, not physical changes.

What is the thermal performance of TPS71525QDCKRM3Q1 at full 50 mA load?

At 50 mA load and +125°C ambient, TPS71525QDCKRM3Q1 with R_θJA = 195.7°C/W (M3 chip) dissipates 125 mW (2.5 V × 50 mA), resulting in ~24.5°C junction rise above ambient - well within the 150°C absolute maximum. This enables continuous operation without thermal shutdown in properly laid-out automotive PCBs.

Can TPS71525QDCKRM3Q1 be used in adjustable-output configurations?

No, TPS71525QDCKRM3Q1 is a fixed 2.5 V output variant and lacks the FB (feedback) pin required for adjustable operation. Only the TPS71501-Q1 (adjustable) and other -xx variants like TPS71533QDCKRM3Q1 have different internal resistor networks; attempting to configure TPS71525QDCKRM3Q1 as adjustable will result in incorrect or unstable output voltage.