Texas Instruments TPS76650DRG4

Overview

TPS76650DRG4 from Texas Instruments is a 5.0V fixed-output, 250mA low-dropout linear voltage regulator in an 8-pin SOIC package. It operates from 2.5V to 16V input, delivers ±1% output accuracy over load and temperature, features 250mV typical dropout at full load, 46dB PSRR at 1MHz, and open-drain power-good signaling-used for MCU biasing and SiC gate driver supplies in HVAC control modules.

For engineers reviewing the TPS76650DRG4 datasheet, TPS76650DRG4 pinout, TPS76650DRG4 application, or TPS76650DRG4 equivalent, key selection criteria include dropout voltage at 250mA, thermal shutdown threshold (173°C), enable logic thresholds (0.4V low / 1.2V high), PG trip hysteresis (0.45% V_OUT), and stability with ≥2.2µF ceramic output capacitance.

Technical Context

The TPS76650DRG4 implements a PMOS pass transistor architecture enabling ultra-low dropout and high PSRR across 1kHz–1MHz. Its internal soft-start (750µs typical) limits inrush current, while the open-drain PG output requires an external pull-up for power-on reset generation.

It integrates overcurrent limiting (0.725A min), thermal shutdown (173°C trip, 157°C reset), and supports operation from transformer-derived rails or upstream DC/DC outputs-enabling direct use after 12V intermediate bus stages without pre-regulation.

Key Specifications

Pinout & Package

TPS76650DRG4 uses an 8-pin SOIC (D) package, 4.9mm × 6mm, with dual IN and dual OUT pins for improved current handling and thermal performance.

Key Features

Applications

Equivalent & Alternatives

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

Compared with TPS76650DRG4, TPS76750DR provides dual outputs at the expense of PG functionality and higher IQ, while MCP1700T-5002E/MB sacrifices input voltage range and control features for minimal size and cost-making TPS76650DRG4 optimal for 12V-based industrial controls requiring robust sequencing and monitoring.

Availability

TPS76650DRG4 is available at Aetrix Electronics and suitable for residential HVAC systems, automotive body electronics, and industrial washer/dryer controllers requiring stable component supply with long-term manufacturability and automotive-grade reliability.

Supply support for TPS76650DRG4 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 headquartered in Dallas, Texas, specializing in analog and embedded processing technologies with broad industrial, automotive, and consumer market reach.

The TPS766 family is designed for high-reliability, wide-input-voltage LDO regulation in harsh environments-targeting HVAC, appliance, and automotive body electronics where input transients, thermal stress, and long product lifecycles are critical.

FAQ

What is the maximum input voltage rating for the TPS76650DRG4?

The TPS76650DRG4 has an absolute maximum input voltage of 18V, with recommended operating range up to 16V. This allows direct use from 12V automotive or HVAC transformer-derived rails while maintaining margin against load-dump transients per ISO 7637-2.

Does the TPS76650DRG4 require an external feedback resistor network?

No, the TPS76650DRG4 is a fixed 5.0V output variant. Pin 1 (FB/NC) is not internally connected and should be left floating or tied to GND for improved thermal performance-no external resistors are needed or supported.

What output capacitor value is required for stable operation of the TPS76650DRG4?

The TPS76650DRG4 is stable with a minimum 2.2µF ceramic output capacitor. Unlike legacy LDOs, it does not require tantalum or electrolytic types, enabling smaller footprint, lower ESR, and improved reliability across temperature.

How does the power-good (PG) output function on the TPS76650DRG4?

The PG pin is an open-drain output that goes high when V_OUT reaches 91–98.5% of nominal (5.0V). It includes 0.45% hysteresis to prevent chatter near threshold and requires an external pull-up resistor to generate a clean power-on reset signal for connected MCUs.

What is the thermal shutdown behavior of the TPS76650DRG4?

The TPS76650DRG4 shuts down at 173°C junction temperature and resets at 157°C, providing 16°C hysteresis. This prevents thermal cycling during overload and allows safe recovery without external intervention-critical for sealed HVAC and appliance enclosures.