Texas Instruments TPS75425QPWP

Overview

TPS75425QPWP from Texas Instruments is a 2.5 V fixed-output, 2-A low-dropout (LDO) voltage regulator with integrated open-drain power-good (PG) output, 210 mV dropout at 2 A, 75 μA quiescent current, and thermal shutdown protection in a 20-pin TSSOP PowerPAD™ package. It delivers stable power to DSPs, FPGAs, and telecom baseband processors requiring fast transient response and tight output tolerance.

For engineers reviewing the TPS75425QPWP datasheet, TPS75425QPWP pinout, TPS75425QPWP application, or TPS75425QPWP equivalent, key selection criteria include PG output timing (83% trip threshold, 100-ms delay), 2% output voltage tolerance over line/load/temperature, ESR-stable operation with 47 μF–100 μF output capacitors, and thermal performance in high-density PCB layouts using the exposed thermal pad.

Technical Context

The TPS75425QPWP uses a PMOS pass element enabling ultralow quiescent current (75 μA typical, independent of load) and dropout voltage directly proportional to output current. Its internal 1.1834 V reference and high-gain error amplifier support 2% output accuracy across –40°C to +125°C junction temperature.

Power-good functionality is implemented via an open-drain comparator monitoring VOUT against 83% of nominal output; it asserts after VOUT stabilizes above threshold with no delay but releases only after 100 ms of sustained undervoltage. The device requires no minimum load and supports zero-ESR ceramic capacitors when used with appropriate external RC filtering per TI design guidelines.

Key Specifications

Pinout & Package

TPS75425QPWP is housed in a thermally enhanced 20-pin TSSOP PowerPAD™ (PWP) package with an exposed copper thermal pad on the underside for PCB-level heat dissipation. The package supports up to 4.6 W power dissipation with high-K PCB layout (8-layer, full ground planes).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS75425QPWP, TPS75225QPWP provides identical regulation performance but substitutes PG status for RESET assertion-requiring changes to power sequencing logic. TPS7A4701RGWR offers superior noise/PSRR but halves current capability and changes package footprint, making it unsuitable for direct replacement in high-current FPGA/DSP applications.

Availability

TPS75425QPWP is available at Aetrix Electronics and suitable for telecom infrastructure, server power management, and FPGA-based embedded systems requiring stable component supply, long-term lifecycle assurance, and traceable sourcing from authorized channels.

Supply support for TPS75425QPWP 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 power regulation solutions.

The TPS754xxQ product line was designed specifically for high-current, fast-transient digital loads-including DSPs, FPGAs, and telecom processors-where low dropout, precise voltage accuracy, and robust power-good signaling are critical.

FAQ

What is the power-good (PG) output behavior of the TPS75425QPWP?

The TPS75425QPWP features an open-drain PG output that goes high-impedance when VOUT reaches 83% of 2.5 V (2.075 V) and remains asserted until VOUT falls below that threshold. It has no built-in delay on assertion but releases only after 100 ms of sustained undervoltage. An external pullup resistor is mandatory; the output sinks ≤1 mA at 0.4 V. This behavior is confirmed in the SLVS242C datasheet Section "Functional Block Diagrams" and "Electrical Characteristics" table.

Does the TPS75425QPWP require a minimum load current to maintain regulation?

No, the TPS75425QPWP operates stably with zero load current. The datasheet explicitly states "stable even at zero load; no minimum load is required for operation" in the "Application Information" section. This eliminates the need for dummy resistive loads in low-power or sleep-mode applications, reducing system power waste and simplifying design.

What output capacitor values and types are recommended for the TPS75425QPWP?

The TPS75425QPWP requires a minimum 47 μF output capacitor with ESR between 100 mΩ and 10 Ω. Solid tantalum, aluminum electrolytic, and multilayer ceramic capacitors are all supported. TI recommends 47 μF–100 μF for general use and notes that larger values improve transient response. These specifications are validated in the "Output Capacitor" and "ESR and Transient Response" sections of the SLVS242C datasheet.

How does the thermal performance of the TPS75425QPWP depend on PCB layout?

The TPS75425QPWP's thermal performance is highly dependent on PCB copper area connected to its four GND/HEATSINK pins (1, 10, 11, 20) and the exposed PowerPAD™. With a high-K 8-layer board (full ground planes), RθJA drops to 57.9°C/W, enabling 4.6 W dissipation at +70°C ambient. With a low-K 1-layer board, RθJA rises to 23.5°C/W and max power drops to 1.9 W. Layout guidance is detailed in TI technical brief SLMA002 and the "Dissipation Ratings" table.

Can the TPS75425QPWP be used with an adjustable output configuration?

No - the TPS75425QPWP is a fixed 2.5 V output variant. Adjustable versions are designated TPS75401QPWP (1.5 V–5 V programmable via external resistor divider). The FB/SENSE pin (pin 7) on TPS75425QPWP is internally connected to the feedback network and must be tied directly to VOUT; it is not user-programmable. This distinction is clearly stated in the "Ordering Information" and "Pin Descriptions" tables of the SLVS242C datasheet.