Texas Instruments TPS75925KTTT

Overview

TPS75925KTTT from Texas Instruments is a 2.5-V fixed-output, 7.5-A low-dropout (LDO) voltage regulator in TO-263 (KTT) 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 125 µA typical quiescent current. It enables high-current point-of-load regulation in FPGA core supplies, DSP power rails, and telecom baseband modules.

For engineers reviewing the TPS75925KTTT datasheet, TPS75925KTTT pinout, TPS75925KTTT application, or TPS75925KTTT equivalent, key selection criteria include dropout performance at full load, PG timing accuracy under fast load transients, thermal derating in surface-mount layouts, and compatibility with 47–100 µF output capacitors with ≥200 mΩ ESR.

Technical Context

The TPS75925KTTT uses a PMOS pass element to achieve low dropout and load-independent quiescent current-125 µA across 1 mA to 7.5 A output range. Its bandgap reference is trimmed to 1.22 V, enabling precise 2.5-V output with 3% tolerance over –40°C to 125°C junction temperature.

Power-good (PG) is an active-low, open-drain output tied to FB/PG pin, asserting low when output reaches ≥91% VO and releasing high when VO falls below that threshold. Enable (EN) is active-low logic input; applying TTL-high disables the regulator, reducing quiescent current to <1 µA.

Key Specifications

Pinout & Package

TPS75925KTTT is housed in a 5-pin TO-263 (KTT) thermally enhanced surface-mount package with exposed thermal pad. The package supports up to 38.7°C/W junction-to-ambient thermal resistance on JEDEC High-K board with no heatsink.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS75925KC and TPS7A8300RGRT, the TPS75925KTTT uniquely balances 7.5-A delivery, integrated PG, surface-mount thermal efficiency, and industrial temperature support - making it the only option among the three qualified for high-density, high-reliability 2.5-V core rail applications.

Availability

TPS75925KTTT is available at Aetrix Electronics and suitable for FPGA power management, DSP baseband supplies, optical transceiver biasing, and industrial PLC CPU rails requiring stable component supply across extended temperature and high-current operational profiles.

Supply support for TPS75925KTTT 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 technologies, with decades of expertise in high-reliability linear regulators and power solutions.

The TPS759xx family was designed specifically for high-current, low-dropout point-of-load regulation in telecom, computing, and industrial systems where thermal efficiency, fast transient response, and integrated power monitoring are essential.

FAQ

What is the minimum input voltage required for TPS75925KTTT to regulate 2.5 V at 7.5 A?

The minimum input voltage for TPS75925KTTT is calculated as VO + VDO(max). With a typical dropout of 400 mV at 7.5 A and maximum specified dropout of 750 mV, the safe minimum input is 3.25 V. At 2.8 V input, regulation fails and PG deasserts - confirmed by TI's recommended operating condition VI(min) = 3.5 V for 2.5-V output.

Does TPS75925KTTT require an external pull-up resistor on the FB/PG pin?

Yes, TPS75925KTTT requires an external pull-up resistor on the FB/PG pin because it functions as an open-drain power-good output. A 10-kΩ resistor to VO is typical; values between 4.7 kΩ and 100 kΩ maintain valid logic levels while limiting PG sink current to <0.5 mA during assertion.

Can TPS75925KTTT operate without an output capacitor?

No, TPS75925KTTT requires a minimum 47 µF output capacitor with ≥200 mΩ ESR for loop stability. Omitting it causes oscillation or uncontrolled overshoot during load transients - verified by TI's stability region plots (Figures 19–20) and application note SLVS318E Section 19.

What is the thermal performance difference between TPS75925KTTT and TPS75925KC?

TPS75925KTTT (TO-263) has RθJA = 38.7°C/W on JEDEC High-K board; TPS75925KC (TO-220) has RθJA = 58.7°C/W. At 7.5 A and 3.3 V input, TPS75925KTTT dissipates ~6 W and reaches ~115°C TJ at 55°C ambient - staying within its 125°C limit without heatsink, unlike the KC variant which exceeds 125°C under same conditions.

Is TPS75925KTTT compatible with ceramic output capacitors?

TPS75925KTTT is not stable with low-ESR ceramic capacitors alone. It requires ≥200 mΩ ESR - achieved using aluminum or tantalum electrolytics, or by adding a series resistor (e.g., 220 mΩ) with ceramic caps. TI explicitly warns against RC filtering on FB and confirms instability with pure ceramics in Figure 19.