Texas Instruments TPS75415QPWP

Overview

TPS75415QPWP from Texas Instruments is a 1.5 V fixed-output, 2-A low-dropout (LDO) voltage regulator with open-drain power-good (PG) output in a thermally enhanced 20-pin TSSOP PowerPAD™ package. It delivers 2 A output current with 210 mV typical dropout at full load, 75 μA quiescent current, and ±2% output voltage tolerance over line, load, and temperature. It serves as a primary post-regulator for DSP/FPGA core supplies requiring fast transient response and precise voltage monitoring.

For engineers reviewing the TPS75415QPWP datasheet, TPS75415QPWP pinout, TPS75415QPWP application, or TPS75415QPWP equivalent, key selection criteria include PG output logic behavior (active-high open-drain), thermal performance in PWP package, dropout compliance at 2 A, ESR-stable 47 μF minimum output capacitance, and compatibility with 1.5 V digital rail sequencing requirements.

Technical Context

The TPS75415QPWP 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 feeds a high-gain error amplifier driving the pass transistor, supporting fast transient recovery via optimized loop compensation.

Power-good functionality is implemented with an open-drain comparator monitoring VOUT against 83% trip threshold (±0.5% hysteresis), asserting PG after VOUT stabilizes above threshold with no delay-distinct from the 100-ms delayed RESET in TPS752xxQ variants. The SENSE pin enables remote sensing for improved regulation accuracy under PCB trace IR drop.

Key Specifications

Pinout & Package

TPS75415QPWP is housed in a 20-pin Thermally Enhanced TSSOP (PWP) package with exposed thermal pad (PowerPAD™) on underside, requiring solder connection to PCB ground plane for optimal thermal performance (R_θJA = 34.6°C/W, no airflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS75415QPWP, TPS75215QPWP provides identical regulation performance but substitutes PG for RESET-requiring redesign of enable/monitoring logic. TPS74801DRCR offers greater flexibility and lower IQ but removes integrated power status signaling entirely, shifting monitoring responsibility to external components.

Availability

TPS75415QPWP is available at Aetrix Electronics and suitable for telecom line cards, server power subsystems, and FPGA/DSP core supplies requiring stable component supply, long-term lifecycle support, and guaranteed thermal performance in industrial temperature range.

Supply support for TPS75415QPWP 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 over 50 years of innovation in high-reliability power solutions.

The TPS754xxQ family was designed specifically for high-current, low-noise, fast-transient applications in digital systems-targeting DSP, FPGA, and ASIC core supplies where precision voltage regulation and real-time rail monitoring are critical.

FAQ

What is the function of the PG pin on the TPS75415QPWP?

The PG (power-good) pin on the TPS75415QPWP is an open-drain, active-high output that signals when the 1.5 V output has stabilized within specification. It transitions to high-impedance when VOUT reaches ≥83% of nominal (≥1.245 V) and pulls low when VOUT falls below that threshold. An external pullup resistor is required, and the signal is used for system power sequencing and fault detection in applications like FPGA configuration and server BIOS initialization.

Does the TPS75415QPWP require a minimum load current to maintain regulation?

No, the TPS75415QPWP does not require a minimum load current. The device is explicitly designed to remain stable and well-regulated from zero load up to 2 A, as confirmed in the Application Information section of the datasheet. This eliminates the need for dummy loads in low-power or standby modes, simplifying design for battery-powered or energy-efficient systems using the TPS75415QPWP.

What is the recommended output capacitor for the TPS75415QPWP and why?

The TPS75415QPWP requires a minimum 47 μF output capacitor with ESR between 100 mΩ and 10 Ω. Solid tantalum, aluminum electrolytic, or multilayer ceramic capacitors meeting this specification ensure loop stability and optimal transient response. Larger capacitance improves load-step recovery; low ESR minimizes initial voltage droop. Using capacitors outside this ESR range risks oscillation or excessive overshoot, directly impacting reliability of circuits powered by the TPS75415QPWP.

How does the TPS75415QPWP behave during thermal overload?

When the junction temperature of the TPS75415QPWP exceeds +150°C, its internal thermal shutdown circuit activates, disabling the output to prevent permanent damage. Once the die cools to approximately +130°C, the device automatically resumes normal operation. This hysteresis prevents rapid on-off cycling. During sustained overload, the TPS75415QPWP's PowerPAD™ package and proper PCB copper area are essential to manage power dissipation and avoid repeated shutdown events.

Can the TPS75415QPWP be used with an input voltage lower than 2.7 V?

No-the absolute minimum input voltage for the TPS75415QPWP is 2.7 V, as specified in the Recommended Operating Conditions table. Although its dropout is only 210 mV at 2 A, the device requires VIN ≥ VOUT + 1 V (i.e., ≥2.5 V) or 2.7 V, whichever is greater. Therefore, for 1.5 V output, the minimum valid input is 2.7 V-not 1.71 V-even though 1.71 V would satisfy the dropout margin alone. Operating below 2.7 V risks undefined behavior or failure to regulate, per datasheet specifications for the TPS75415QPWP.