Texas Instruments TPS71530QDCKRM3Q1

Overview

TPS71530QDCKRM3Q1 from Texas Instruments is an AEC-Q100 Grade 1 automotive-qualified low-dropout linear regulator delivering 30 V fixed output at up to 50 mA, with 3.2 μA typical quiescent current, 2.5 V to 24 V input range, and stable operation using ≥0.47 μF output capacitance - deployed in battery-powered microcontroller power rails for hybrid powertrain control units.

For engineers reviewing the TPS71530QDCKRM3Q1 datasheet, TPS71530QDCKRM3Q1 pinout, TPS71530QDCKRM3Q1 application, or TPS71530QDCKRM3Q1 equivalent, key selection criteria include ultra-low IQ across full load range (0–50 mA), dropout voltage of 415 mV at 50 mA, SC70-5 thermal performance (RθJB = 40.7°C/W for new chip), and AEC-Q100 HBM ±3000 V / CDM ±1500 V ESD robustness.

Technical Context

The TPS71530QDCKRM3Q1 implements a CMOS pass transistor architecture with internal 1.205 V bandgap reference and leakage-null control circuit active below 5 μA load. Its dropout behavior follows R_DS(ON)-dominated scaling, delivering 415 mV typical V_DO at 50 mA and maintaining regulation down to V_IN = V_OUT + V_DO.

It features internal soft-start to limit inrush current into the output capacitor and brick-wall overcurrent protection with 125–350 mA trip threshold depending on VIN and chip revision. The device operates across –40°C to +125°C ambient and supports both fixed-output (30 V) and adjustable configurations via FB pin.

Key Specifications

Pinout & Package

TPS71530QDCKRM3Q1 uses the 5-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for space-constrained automotive ECUs. Pin 1 is NC (no connect), Pin 2 is GND, Pin 3 is NC, Pin 4 is IN, and Pin 5 is OUT. Both NC pins are unconnected internally and may be grounded for improved thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71530QDCKRM3Q1, the 3.3 V TPS71533QDCKRM3Q1 shares identical AEC-Q100 Grade 1 qualification, SC70-5 footprint, and 3.2 μA IQ but serves logic domains rather than high-voltage sensor bias; TPS7B8733QDGNRQ1 offers higher current but triples IQ and changes package geometry, requiring PCB redesign.

Availability

TPS71530QDCKRM3Q1 is available at Aetrix Electronics and suitable for hybrid powertrain control, body electronics modules, infotainment display backlighting, and ADAS camera power management requiring stable component supply across automotive production lifecycles.

Supply support for TPS71530QDCKRM3Q1 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 company headquartered in Dallas, Texas, designing analog and embedded processing chips for industrial, automotive, and communications markets.

The TPS715-Q1 product line delivers ultra-low-IQ LDOs for automotive battery-connected systems where extended sleep-mode runtime and AEC-Q100 reliability are mandatory - specifically targeting always-on ECUs in electrified vehicles.

FAQ

What is the maximum input voltage rating for TPS71530QDCKRM3Q1?

The TPS71530QDCKRM3Q1 has an absolute maximum input voltage of 30 V for the new chip revision (M3), as specified in Section 6.1 of the datasheet. This exceeds its 24 V recommended maximum operating voltage and provides margin against load-dump transients in 24 V automotive systems. Operation above 24 V is permissible only for short-duration transients and must remain within the 30 V absolute max limit to avoid permanent damage to the TPS71530QDCKRM3Q1.

Does TPS71530QDCKRM3Q1 require an input capacitor?

The TPS71530QDCKRM3Q1 does not require an input capacitor for stability, but a 0.047 μF ceramic capacitor is recommended at the IN pin to suppress high-frequency ringing caused by source inductance during load transients. This recommendation applies to all TPS715-Q1 variants including the TPS71530QDCKRM3Q1 and helps maintain system-level stability without adding bulk capacitance.

Is TPS71530QDCKRM3Q1 pin-compatible with other TPS715-Q1 variants?

Yes, all TPS715-Q1 SC70-5 variants including TPS71530QDCKRM3Q1 share identical pinout: Pin 1 (NC), Pin 2 (GND), Pin 3 (NC), Pin 4 (IN), Pin 5 (OUT). This allows board-level substitution between fixed-output versions (e.g., 3.3 V, 5 V, 30 V) without layout changes - provided output voltage and load requirements align with the replacement part's specifications.

What is the thermal performance of TPS71530QDCKRM3Q1 at 50 mA load?

At 50 mA output current and +125°C ambient, the TPS71530QDCKRM3Q1 (new chip/M3) exhibits a junction-to-board thermal resistance (RθJB) of 40.7°C/W. With typical PCB copper, this results in a junction temperature rise of ~20°C above ambient, keeping T_J well below the 150°C absolute maximum - enabling continuous 50 mA operation in automotive under-hood environments without derating.

How does the leakage-null control circuit affect TPS71530QDCKRM3Q1 operation?

TPS71530QDCKRM3Q1 incorporates a leakage-null control circuit that activates only when output load is below 5 μA, VIN exceeds 18 V, and die temperature exceeds 100°C. It reduces ground current drift under those specific high-stress, ultra-light-load conditions - preserving the 3.2 μA typical IQ specification in battery-backed always-on applications where TPS71530QDCKRM3Q1 is commonly deployed.