Texas Instruments TPS75925KC

Overview

TPS75925KC from Texas Instruments is a 7.5-A, 2.5-V fixed-output low-dropout (LDO) voltage regulator in a TO-220 (KC) package with integrated open-drain power-good (PG) output, 400 mV typical dropout at 7.5 A, ±3% output voltage tolerance over line/load/temperature, and thermal shutdown protection. It enables high-current point-of-load regulation in FPGA core supplies, DSP power rails, and telecom baseband modules.

For engineers reviewing the TPS75925KC datasheet, TPS75925KC pinout, TPS75925KC application, or TPS75925KC equivalent, key selection criteria include dropout performance at full load, PG threshold accuracy (91% VO), quiescent current (125 µA), thermal resistance (RθJC = 2°C/W), and compatibility with ≥47 µF/≥200 mΩ output capacitors.

Technical Context

The TPS75925KC uses a PMOS pass transistor architecture that delivers low dropout voltage directly proportional to output current and maintains ultra-low, load-independent quiescent current (125 µA typ). Its internal bandgap reference (1.22 V) and error amplifier regulate output with 3% tolerance across –40°C to 125°C junction temperature.

It integrates an active-low open-drain PG output tied to FB/PG pin, asserting low when VO reaches ≥91% of nominal 2.5 V and releasing high when VO falls below that threshold. Enable (EN) is active-low, supporting TTL-compatible shutdown with <1 µA standby current.

Key Specifications

Pinout & Package

TPS75925KC is housed in a 5-pin TO-220 (KC) package with exposed tab thermally connected to GND. The package features vertical mounting, free-standing orientation, and RθJC = 2°C/W for efficient heatsink coupling.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS75925KTT, the TPS75925KC offers superior mechanical robustness and heatsink flexibility in through-hole systems, while TPS7A8300RGRT trades current capability for precision and efficiency in lighter loads - making TPS75925KC the sole choice for validated 7.5-A, 2.5-V fixed-output regulation with PG.

Availability

TPS75925KC is available at Aetrix Electronics and suitable for FPGA core supplies, DSP power rails, and industrial PLC CPU boards requiring stable component supply, long-term lifecycle support, and traceable sourcing for production programs.

Supply support for TPS75925KC 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 power management ICs, with decades of expertise in high-reliability linear regulators and power solutions.

The TPS759xx family was designed specifically for high-current, low-noise point-of-load regulation in telecom infrastructure, industrial computing, and programmable logic systems demanding fast transient response and accurate power-good signaling.

FAQ

What is the maximum output current rating of the TPS75925KC?

The TPS75925KC is rated for 7.5 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, VI ≥ 3.5 V). This rating is supported by internal current limiting set at approximately 10 A peak and thermal shutdown at 150°C junction temperature, ensuring safe operation even during short-duration transients. The TPS75925KC maintains regulation up to this current with 400 mV typical dropout voltage.

Does the TPS75925KC require an external feedback resistor network?

No, the TPS75925KC is a fixed-output 2.5-V regulator and does not require external feedback resistors. Its output voltage is internally trimmed to 2.5 V ±3% across line, load, and temperature. The FB/PG pin serves exclusively as an open-drain power-good output - it must be pulled up externally (e.g., with a 10-kΩ resistor to VO) but is not used for voltage setting. Only the adjustable TPS75901 variant requires an external resistor divider.

What is the purpose and behavior of the FB/PG pin on the TPS75925KC?

On the TPS75925KC, the FB/PG pin functions solely as an open-drain power-good (PG) output. It asserts low when the output voltage reaches ≥91% of 2.5 V (i.e., ≥2.275 V) and releases high-impedance when VO drops below that threshold. This provides precise, hysteresis-equipped (0.5% VO) status signaling for power sequencing and fault detection. Unlike the TPS75901, the TPS75925KC does not use this pin for feedback - no connection to VO or resistors is needed beyond the required external pullup.

Can the TPS75925KC operate with an input voltage lower than 3.3 V?

Yes, the TPS75925KC supports a minimum input voltage of 2.8 V per absolute maximum ratings, but valid regulation requires VI ≥ VO + VDO. With a typical dropout of 400 mV at 7.5 A, the practical minimum input is ~2.9 V at light loads and ~3.2 V at full load. Operation below 3.5 V may reduce margin for PG assertion and increase thermal stress - TI specifies 3.5 V ≤ VI ≤ 5.5 V for guaranteed 2.5-V output across all conditions, including worst-case tolerance and temperature.

What thermal management considerations apply to the TPS75925KC in TO-220 (KC) package?

The TPS75925KC in TO-220 (KC) package has RθJC = 2°C/W and RθJA = 58.7°C/W (free-air, no heatsink). To sustain 7.5 A at 2.5 V with 3.3-V input (2.4 W dissipation), a heatsink with RθSA ≤ 22°C/W is required at 55°C ambient to keep TJ ≤ 125°C. The exposed metal tab must be electrically and thermally connected to GND and a heatsink using thermal compound. Without heatsinking, continuous 7.5-A operation exceeds safe junction limits above ~40°C ambient.