Texas Instruments TPS71530DCKRM3

Overview

TPS71530DCKRM3 from Texas Instruments is a fixed-output 3.0-V, 50-mA low-dropout linear regulator with ultra-low 3.2-μA quiescent current, stable over –40°C to +125°C junction temperature and compatible with ≥0.47-μF ceramic output capacitors. It operates from 2.5 V to 24 V input, delivers 415 mV typical dropout at 50 mA, and targets battery-powered microcontroller power rails in space-constrained industrial sensors.

For engineers reviewing the TPS71530DCKRM3 datasheet, TPS71530DCKRM3 pinout, TPS71530DCKRM3 application, or TPS71530DCKRM3 equivalent, key selection criteria include guaranteed 3.0-V output accuracy (±4%), thermal performance in SC70-5 (R_θJB = 40.7°C/W for new chip), soft-start behavior limiting inrush, and overcurrent protection with 125–350-mA brick-wall limit depending on VIN and chip revision.

Technical Context

The TPS71530DCKRM3 implements a CMOS pass transistor architecture with internal 1.205-V bandgap reference and leakage-null control circuit active under light-load/high-VIN/high-temperature conditions. Its dropout voltage scales linearly with load current due to R_DS(ON) of the pass element, enabling predictable regulation down to VIN = VOUT + 415 mV at full 50 mA.

It features a dedicated ground pin (Pin 2) and no-enable logic - operation is always active when VIN is within spec. The device includes internal overcurrent protection with brick-wall limiting and thermal robustness validated across –40°C to +125°C, but lacks shutdown or enable functionality.

Key Specifications

Pinout & Package

TPS71530DCKRM3 is housed in a 5-pin SC70 (DCK) package measuring 2.00 mm × 1.25 mm, optimized for high-density PCB layouts. Pin 1 and Pin 3 are NC (no-connect); Pin 2 is GND; Pin 4 is IN; Pin 5 is OUT.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS71530DCKRM3, TPS71533DCKRM3 offers identical form-factor and performance with 3.3-V output for logic compatibility, while MCP1700T-3002E/TT trades SC70-5 miniaturization for higher current and lower IQ but requires PCB redesign due to SOT-23-5 pinout and thermal profile differences.

Availability

TPS71530DCKRM3 is available at Aetrix Electronics and suitable for home automation sensor nodes, industrial PLC I/O modules, medical wearable monitors, and smart lighting controllers requiring stable component supply with long-term manufacturability.

Supply support for TPS71530DCKRM3 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 specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and personal electronics markets.

The TPS715 family was designed specifically for ultra-low-power, wide-input-voltage LDO applications in battery-operated and energy-harvesting systems - emphasizing quiescent current optimization without sacrificing thermal robustness or output accuracy.

FAQ

What is the maximum input voltage rating for TPS71530DCKRM3?

The TPS71530DCKRM3 has an absolute maximum input voltage of 30 V for the new-chip revision (M3 suffix), and 24 V for legacy versions. Its recommended operating range is 2.5 V to 24 V. Exceeding 30 V risks permanent damage, and operation above 24 V should only occur transiently per TI's absolute maximum ratings table - sustained use above 24 V is not advised unless confirmed as new-chip M3 revision with full characterization at 30 V.

Does TPS71530DCKRM3 require an enable pin to operate?

No, TPS71530DCKRM3 has no enable (EN) or shutdown pin - it operates continuously whenever valid input voltage is applied within its specified range. This simplifies design by eliminating external pull-up resistors or control logic, but means power sequencing must be managed at the input rail level. The device enters dropout mode rather than disabling when VIN drops below VOUT + VDO.

Can TPS71530DCKRM3 be used with a 0.47-μF X7R ceramic capacitor?

Yes, TPS71530DCKRM3 is explicitly characterized and stable with output capacitance ≥0.47 μF, including standard X7R ceramics. TI's datasheet confirms stability across capacitor dielectrics and tolerances, provided effective capacitance remains ≥0.47 μF after DC bias and temperature derating - a 1-μF, 6.3-V X7R part is commonly used to guarantee margin.

What is the thermal performance difference between legacy and new-chip TPS71530DCKRM3?

The new-chip revision (M3) of TPS71530DCKRM3 improves thermal resistance to board (R_θJB) from 84.6°C/W to 40.7°C/W in the SC70-5 package, nearly doubling power dissipation capability at the same board temperature rise. This allows up to ~350 mW continuous dissipation with 15°C ΔT, versus ~175 mW for legacy chips - critical for high-ambient industrial deployments.

Is TPS71530DCKRM3 pin-compatible with other TPS715 fixed-output variants?

Yes, all fixed-output TPS715 variants in DCK (SC70-5) packaging - including TPS71518, TPS71525, TPS71533, and TPS71550 - share identical pinout (IN, GND, NC, NC, OUT) and footprint. Only the output voltage differs; no PCB changes are needed when swapping between fixed-voltage options, provided input/output capacitor values meet each variant's stability requirements.