Texas Instruments TPS76801QPWP

Overview

TPS76801QPWP from Texas Instruments is an adjustable low-dropout (LDO) voltage regulator with 1-A output capability, 230-mV typical dropout at 1 A (TPS76850 reference), ±2% output accuracy over temperature and load, and ultralow 85-µA quiescent current. It operates from 2.7 V to 10 V input and delivers 1.2 V to 5.5 V output, used in battery-powered portable instrumentation requiring stable, low-noise rail generation.

For engineers reviewing the TPS76801QPWP datasheet, TPS76801QPWP pinout, TPS76801QPWP application, or TPS76801QPWP equivalent, key selection criteria include its PMOS pass architecture enabling load-independent quiescent current, open-drain power-good (PG) output with 92–98% trip threshold, thermal shutdown at 150°C, and stability with 10-µF/60-mΩ–1.5-Ω ESR output capacitors.

Technical Context

The TPS76801QPWP employs a PMOS pass transistor-unlike conventional PNP-based LDOs-yielding dropout voltage directly proportional to output current and eliminating base-current-driven quiescent current rise under load. Its internal 1.1834-V reference feeds a high-impedance feedback amplifier, supporting external resistor programming of output voltage via FB pin.

Power-good monitoring uses an internal comparator comparing regulated output against 92–98% of nominal value; PG asserts low when VO drops below threshold, requiring external pull-up. The device features thermal shutdown (150°C trip, 130°C recovery) and current limiting (~1.7 A), with no minimum load requirement and compatibility with zero-load operation.

Key Specifications

Pinout & Package

TPS76801QPWP is housed in a 20-pin HTSSOP (PWP) package with exposed thermal pad (GND/HSINK on pins 1, 2, 9–12, 19, 20) for enhanced thermal performance. Pin count and layout are optimized for high-current LDO applications requiring low thermal resistance (32.6°C/W, no airflow).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and LT1763CS8-3.3#TRPBF, the TPS76801QPWP uniquely balances wide-input-range operation (2.7–10 V), full 1-A capability, adjustable output, and integrated PG-all in a thermally enhanced 20-pin HTSSOP, making it optimal for industrial and portable systems demanding versatility and ruggedness.

Availability

TPS76801QPWP is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, and automotive body control units requiring stable component supply with guaranteed long-term manufacturability.

Supply support for TPS76801QPWP 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 connectivity technologies, with decades of expertise in power management IC design and manufacturing.

The TPS768xxQ family was engineered for high-reliability, low-quiescent-current LDO regulation in battery-powered and thermally constrained applications-emphasizing PMOS architecture, fast transient response, and integrated protection.

FAQ

What is the minimum input voltage required for TPS76801QPWP to regulate at 3.3 V output?

The minimum input voltage for TPS76801QPWP to regulate at 3.3 V is VO + VDO = 3.3 V + 0.23 V = 3.53 V under 1-A load (based on TPS76850 dropout data). However, per datasheet absolute minimum VI is 2.7 V-so if load is light (<10 mA), regulation may hold down to 2.7 V. For full 1-A operation at 3.3 V, maintain VIN ≥3.6 V.

Can TPS76801QPWP operate without an output capacitor?

No-TPS76801QPWP requires a minimum 10-µF output capacitor with ESR between 60 mΩ and 1.5 Ω for loop stability. Omitting it causes oscillation or erratic regulation. Solid tantalum, aluminum electrolytic, or multilayer ceramic capacitors meeting these specs are acceptable; 0-Ω ESR ceramics require series resistance to meet lower bound.

How does the power-good (PG) output of TPS76801QPWP behave during startup and dropout?

PG is an open-drain output that goes high (via external pull-up) only when VO reaches ≥92% of its programmed value and remains within 2% tolerance. During startup, PG asserts after VO stabilizes; during dropout, PG pulls low when VO falls below 92%, providing early warning before regulation loss-not at final 2% error boundary.

Is the FB pin of TPS76801QPWP required to be connected for fixed-output operation?

No-the FB pin is only used in the TPS76801 adjustable variant. For fixed-output versions (e.g., TPS76833QPWP), FB is labeled NC (no internal connection) and must remain unconnected. In TPS76801QPWP, FB is functional and must be tied to the resistor divider; leaving it floating causes undefined output voltage.

What thermal derating applies to TPS76801QPWP at 85°C ambient temperature?

For TPS76801QPWP in HTSSOP (PWP) package, the dissipation rating at TA = 85°C is 1.2 W (per datasheet Dissipation Rating Table). At 25°C, max power is 1.7 W; above 25°C, derating is 30.7 mW/°C. Thus at 85°C, PDmax = 1.7 W − (60°C × 30.7 mW/°C) = 1.7 W − 1.842 W → limited to 1.2 W as tabulated.