Texas Instruments TPS75525KTTR

Overview

TPS75525KTTR from Texas Instruments is a 5-A, 2.5-V fixed-output low-dropout (LDO) voltage regulator in TO-263 (KTT) surface-mount package, featuring open-drain power-good (PG) output, 250 mV typical dropout at 5 A, 125 µA quiescent current, and ±3% output voltage tolerance over line, load, and temperature. It enables efficient 3.3-V-to-2.5-V conversion in high-current digital power rails.

For engineers reviewing the TPS75525KTTR datasheet, TPS75525KTTR pinout, TPS75525KTTR application, or TPS75525KTTR equivalent, key selection criteria include dropout performance at full load, thermal behavior in TO-263 layout, PG timing hysteresis (0.5%VO), and compatibility with 100 µF output capacitance for fast transient response in FPGA/ASIC core supply designs.

Technical Context

The TPS75525KTTR uses a PMOS pass element to achieve low, current-proportional dropout (250 mV typ. at 5 A) and load-independent quiescent current (125 µA typ.). Its bandgap reference (1.22 V) and internal error amplifier deliver 2.5 V output with 3% tolerance across −40°C to 125°C junction temperature.

It integrates enable-controlled shutdown (EN low = active), thermal shutdown (150°C trip), current limiting (~10 A), and an open-drain PG output that asserts low when VO ≥ 91% of 2.5 V and releases at ≤89%, requiring external pull-up. UVLO activates below 2.2 V input.

Key Specifications

Pinout & Package

TPS75525KTTR is housed in a 5-pin TO-263 (KTT) thermally enhanced surface-mount package with exposed tab connected to GND. The tab serves as primary thermal path to PCB copper plane.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS75525KTTR, TPS75525KTTR offers optimal balance of 5-A capacity, 250-mV dropout, and integrated PG in TO-263; TPS75725KTTR scales current at cost of efficiency, while TLV75525PDQNR sacrifices capability for size and IQ - making TPS75525KTTR the preferred choice for mid-power industrial and automotive core rails.

Availability

TPS75525KTTR is available at Aetrix Electronics and suitable for industrial PLCs, FPGA power systems, medical imaging interfaces, and automotive ADAS camera modules requiring stable component supply, long-term lifecycle support, and traceable sourcing.

Supply support for TPS75525KTTR 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 TPS755xx family was designed specifically for high-current, low-noise, thermally demanding applications such as FPGA, DSP, and ASIC core power delivery where dropout, transient response, and integrated monitoring (PG) are critical.

FAQ

What is the maximum continuous output current of the TPS75525KTTR?

The TPS75525KTTR delivers up to 5 A of continuous output current under recommended operating conditions (TJ ≤ 125°C, VI = 3.5–5.5 V). Current limiting engages at approximately 10 A, causing output voltage foldback to protect the device. Sustained operation at 5 A requires proper PCB thermal design using the TO-263 exposed tab and ≥2 cm² copper heatsink area per TI thermal models.

Does the TPS75525KTTR require an external feedback resistor network?

No, the TPS75525KTTR is a fixed 2.5-V output variant and does not use the FB/PG pin for feedback. Pin 5 functions solely as an open-drain power-good (PG) output. An external pull-up resistor (typically 4.7–10 kΩ to 3.3 V or VO) is required for PG functionality - no resistor divider is needed or used for voltage setting.

What is the purpose of the EN pin on the TPS75525KTTR, and how should it be driven?

The EN pin on the TPS75525KTTR is an active-low enable input: logic low (≤0.7 V) enables regulation; logic high (≥2 V) places the device in shutdown mode, reducing quiescent current to <1 µA. It must be driven by a clean digital signal - floating or high-impedance states are undefined. For power sequencing, tie EN to a controlled rail or microcontroller GPIO with appropriate voltage translation if needed.

How does the power-good (PG) output behave during startup and fault conditions for the TPS75525KTTR?

The PG output of the TPS75525KTTR is an open-drain, active-low signal that goes low when VO reaches ≥91% of 2.5 V (≥2.275 V) and returns high-impedance when VO falls ≤89% (≤2.225 V), with 0.5%VO hysteresis. During startup, PG remains high-impedance until regulation is achieved; during overload or input brownout, PG asserts high-impedance to indicate fault - requiring external pull-up for defined logic levels.

What thermal design considerations apply to the TPS75525KTTR in its TO-263 (KTT) package?

The TPS75525KTTR's TO-263 package relies on the exposed GND tab for thermal conduction. TI specifies RθJA = 38.7°C/W on JEDEC High-K board with no heatsink. To sustain 5 A at elevated ambient, use ≥2 cm² of 2-oz copper connected via ≥25 thermal vias to inner ground planes. Avoid solder mask over the tab area and ensure full-surface solder reflow for optimal thermal resistance.