Texas Instruments TPS76718QPWP

Overview

TPS76718QPWP from Texas Instruments is a 1.8-V fixed-output, 1-A low-dropout linear regulator with PMOS pass element, 230-mV dropout at 1 A (typ), 85-µA quiescent current, and integrated open-drain power-on reset with 200-ms delay - used in battery-powered microcontroller power rails requiring stable low-voltage bias.

For engineers reviewing the TPS76718QPWP datasheet, TPS76718QPWP pinout, TPS76718QPWP application, or TPS76718QPWP equivalent, key selection criteria include dropout voltage vs. load/temperature, RESET threshold hysteresis (92–98% VO), thermal shutdown (150°C), output stability with 10-µF low-ESR capacitors, and enable-controlled sleep mode (1-µA standby).

Technical Context

The TPS76718QPWP employs a voltage-driven PMOS pass transistor to achieve load-independent quiescent current (85 µA typ, 125 µA max over −40°C to 125°C) and low dropout (350 mV typ at 1 A, 25°C). Its internal 1.1834-V reference feeds a high-impedance feedback amplifier for precise output regulation.

A dedicated comparator monitors regulated output voltage and asserts an open-drain RESET signal when VO drops below 92% of nominal (1.656 V at 1.8 V), with 0.5-V hysteresis and 200-ms timeout - enabling reliable microprocessor power-on reset sequencing without external circuitry.

Key Specifications

Pinout & Package

TPS76718QPWP is housed in a 20-pin HTSSOP PowerPAD™ (PWP) package (6.50 mm × 4.40 mm) with exposed thermal pad for enhanced heat dissipation (R_θJA = 35.8°C/W).

Key Features

Applications

Equivalent & Alternatives

The following parts are listed as comparable options for similar low-dropout linear regulator applications.

Compared with TPS76718QD, the TPS76718QPWP offers superior thermal performance and higher current capability; compared with TPS7A2018PDBVR, it trades higher quiescent current for full 1-A delivery and essential power-on reset functionality in embedded control systems.

Availability

TPS76718QPWP is available at Aetrix Electronics and suitable for portable medical sensors, industrial PLC I/O modules, automotive body control units, and wearable fitness trackers requiring stable component supply with long-term lifecycle support.

Supply support for TPS76718QPWP 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 company specializing in analog and embedded processing technologies, with leadership in power management ICs for industrial, automotive, and consumer markets.

The TPS767xx family was designed specifically for battery-powered and space-constrained applications demanding fast transient response, ultralow quiescent current, and integrated power-on reset - targeting microcontroller, FPGA, and sensor subsystems.

FAQ

What is the minimum input voltage required for TPS76718QPWP to maintain regulation?

The TPS76718QPWP requires a minimum input voltage of 2.15 V to sustain 1.8-V output regulation at 1 A load, based on its 350-mV typical dropout voltage at 25°C. At full temperature range (−40°C to 125°C), dropout rises to 675 mV, increasing minimum VIN to 2.475 V. Input must also exceed 2.8 V per recommended operating conditions to ensure internal circuitry functions correctly.

Does TPS76718QPWP require an external pullup resistor on the RESET pin?

Yes, TPS76718QPWP features an open-drain RESET output that requires an external pullup resistor (typically 10–100 kΩ to V_CC or system rail) to assert a valid high-level signal to the microcontroller reset input. Without the pullup, RESET remains floating and cannot drive a logic-high state; the internal transistor only pulls low when VO drops below 92% of nominal.

Can TPS76718QPWP operate without an output capacitor?

No, TPS76718QPWP requires a minimum 10-µF output capacitor with ESR between 50 mΩ and 1.5 Ω for loop stability. Omitting the capacitor causes oscillation and output voltage collapse. Ceramic, tantalum, or aluminum electrolytic types are acceptable if ESR and capacitance meet specifications - multilayer ceramic capacitors (MLCCs) are commonly used due to low ESR and small footprint.

How does the EN pin affect quiescent current in TPS76718QPWP?

When EN is pulled low (≤0.9 V), TPS76718QPWP enters shutdown mode, reducing quiescent current to 1 µA at 25°C (10 µA max over −40°C to 125°C). This is distinct from normal operation, where I_Q remains constant at 85 µA regardless of output load - enabling true zero-power standby in battery-critical systems without sacrificing startup speed.

Is TPS76718QPWP compatible with 1.8-V FPGA core voltage requirements?

Yes, TPS76718QPWP delivers 1.8 V ±2% over line, load, and temperature (−40°C to 125°C), meeting typical FPGA VCCINT tolerances. Its 55-µV_RMS output noise, fast load transient response, and dual OUT/GND pins minimize supply-induced jitter - making it suitable for powering 1.8-V FPGA configuration banks and I/O banks in industrial and automotive designs.