Texas Instruments TPS77801PWP

Overview

TPS77801PWP from Texas Instruments is a 750-mA adjustable low-dropout (LDO) voltage regulator with open-drain power-good (PG) output, 1.2 V to 5.5 V programmable output range, 260 mV typical dropout at 750 mA, 85 µA typical quiescent current, and thermal shutdown protection - used in battery-powered embedded systems requiring stable, low-noise rail generation.

For engineers reviewing the TPS77801PWP datasheet, TPS77801PWP pinout, TPS77801PWP application, or TPS77801PWP equivalent, key selection criteria include its adjustable output range (1.2–5.5 V), PG indicator functionality, PWP package thermal performance (2.9 W @ 0 CFM), PMOS pass element architecture, and compatibility with 10 µF low-ESR output capacitors.

Technical Context

The TPS77801PWP employs a PMOS pass transistor enabling ultralow, load-independent quiescent current (85 µA typ) and dropout voltage directly proportional to output current. Its internal 1.1834 V reference feeds a high-impedance feedback amplifier for precise output regulation via external R1/R2 divider.

It integrates an open-drain power-good (PG) comparator monitoring regulated output voltage with 92–98% VO trip threshold and 0.5% VO hysteresis, plus enable logic with TTL-compatible thresholds (VIH = 1.7 V, VIL = 0.9 V) and thermal shutdown activation at ~150°C.

Key Specifications

Pinout & Package

TPS77801PWP is housed in a 20-pin HTSSOP PowerPAD™ (PWP) package with exposed thermal pad (GND/HSINK on pins 1, 2, 9, 10, 11, 12, 19, 20) for enhanced thermal dissipation (2.9 W @ 0 CFM on 1-layer PCB).

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS7A4700RGWR and LP5907MFX-3.3/NOPB, the TPS77801PWP uniquely combines 750 mA output, 1.2–5.5 V adjustability, integrated PG monitoring, and PWP thermal performance - making it optimal for mid-power embedded systems requiring both flexibility and system-level status reporting.

Availability

TPS77801PWP is available at Aetrix Electronics and suitable for industrial control, portable medical devices, automotive body electronics, and network edge gateways requiring stable component supply, long-term lifecycle support, and RoHS-compliant packaging.

Supply support for TPS77801PWP 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, embedded processing, and connectivity technologies for industrial, automotive, and consumer markets.

The TPS778xx family was designed for high-reliability, battery-sensitive applications requiring precise voltage regulation, low quiescent current, and integrated power-status monitoring - particularly where PMOS-based LDO efficiency and thermal robustness are critical.

FAQ

What output voltage range does the TPS77801PWP support?

The TPS77801PWP supports an adjustable output voltage range of 1.2 V to 5.5 V, set via an external resistor divider connected to the FB pin. This range is confirmed in the "Recommended Operating Conditions" table (page 6) and functional block diagram (page 3) of the SLVS230G datasheet, with 1.1834 V internal reference enabling precise programming across the full span.

Does the TPS77801PWP include power-good (PG) functionality?

Yes, the TPS77801PWP features an open-drain power-good (PG) output on pin 16. It asserts low when the regulated output falls below 92% of nominal (with 0.5% hysteresis), providing system-level undervoltage detection. This differs from the RESET function in the TPS777xx series and is explicitly documented in the Terminal Functions table (page 4) and "Power-Good Indicator" section (page 17).

What is the maximum continuous output current for the TPS77801PWP?

The TPS77801PWP delivers up to 750 mA of continuous output current, as specified in the device description (page 1), absolute maximum ratings (page 6), and electrical characteristics (page 7). This rating assumes proper thermal management using the PWP package's exposed thermal pad and adheres to the 2.9 W power dissipation limit at TA < 25°C with 0 CFM airflow.

How does the TPS77801PWP achieve low quiescent current?

The TPS77801PWP achieves 85 µA typical quiescent current by using a PMOS pass transistor - a voltage-driven element whose gate current remains negligible across load conditions. This architecture avoids the base-current dependency of bipolar pass elements, ensuring consistent low IQ from 0 mA to 750 mA, as detailed in the "Device Operation" section (page 15) and electrical characteristics table (page 7).

What package type and thermal characteristics does the TPS77801PWP use?

The TPS77801PWP uses the 20-pin HTSSOP PowerPAD™ (PWP) package with an exposed thermal pad (pins 1, 2, 9, 10, 11, 12, 19, 20). Its thermal performance is rated at 2.9 W (0 CFM, 1-layer PCB) and 4.3 W (300 CFM), with derating factors of 23.5 mW/°C and 34.6 mW/°C respectively - values confirmed in Dissipation Rating Table 2 (page 6) and Package Option Addendum.