LDO Voltage Regulators 3A LDO w/ Prog Soft- Start A 595-TPS74401RGWT

TPS74401RGWR – 3A Adjustable LDO Voltage Regulator – Texas Instruments

Optimize your power management design with the TPS74401RGWR low-dropout (LDO) voltage regulator from Texas Instruments. This high-performance IC delivers up to 3A output current with ultra-low 0.24V dropout voltage, ensuring stable power delivery even in demanding applications. Featuring adjustable output (0.8V–3.6V) and advanced control/protection functions, it’s engineered for efficiency-critical systems where reliability is non-negotiable. PCX ensures genuine Texas Instruments components with fast shipping and dedicated technical support.

Key Features

• High Current Output: Delivers 3A continuous current for power-hungry circuits
• Ultra-Low Dropout: Only 0.24V dropout at full load (3A) maximizes efficiency
• Wide Adjustable Output: 0.8V to 3.6V range via external resistors
• Enhanced Stability: 73dB PSRR (1kHz) minimizes noise interference
• Robust Protections: Over-current, thermal shutdown, short-circuit, and UVLO
• Industrial Temperature Range: Operates from -40°C to +125°C

Technical Specifications

• Input Voltage: Max 5.5V DC
• Control Features: Enable pin, Power Good signal, programmable Soft Start
• Package: 20-VQFN (5x5mm) exposed pad for superior thermal dissipation
• Mounting: Surface-mount (SMD) design
• Compliance: RoHS compliant, active status

Note: Product images are representational. Refer to datasheet for exact dimensions.

Typical Applications

• FPGA, ASIC, and processor core voltage regulation
• 5G infrastructure and telecom power subsystems
• Industrial automation controllers and sensors
• Medical diagnostic equipment power rails
• Automotive infotainment and ADAS modules

About Texas Instruments

Texas Instruments (TI) is a global semiconductor leader with over 90 years of innovation in analog and embedded processing technologies. Their power management ICs set industry benchmarks for efficiency, thermal performance, and reliability. TI’s rigorous quality control and automotive-grade manufacturing processes ensure components meet stringent operational demands in mission-critical environments.

TI’s investment in R&D drives continuous improvements in power density and energy efficiency, making their voltage regulators the preferred choice for engineers designing next-generation electronics. Their comprehensive technical resources, including reference designs and simulation tools, accelerate product development cycles across all market segments.

About LDO Voltage Regulators

Low Dropout (LDO) regulators provide precise voltage regulation with minimal input-to-output differential, making them essential for noise-sensitive applications where switching converters are impractical. Unlike traditional regulators, LDOs maintain stable outputs even when input voltage approaches the target output, significantly improving system efficiency and battery life in portable devices.

Modern LDOs like the TPS74401 integrate sophisticated features such as soft-start sequencing, power-good indicators, and multi-level protection circuits. These ICs serve as the “last mile” power solution for sensitive loads, suppressing noise from upstream switching regulators while delivering clean, stable voltage to processors, RF modules, and data converters.

Packaging Options

• Tape & Reel (TR) for automated assembly lines
• Cut Tape (CT) for prototyping and small batches
• Digi-Reel® compatible packaging

Frequently Asked Questions

Q: What heatsinking is required for 3A continuous operation?
A: The exposed thermal pad must be soldered to a PCB copper pour (≥4cm²). For high-ambient temperatures, supplemental heatsinking is recommended.

Q: Can this LDO be paralleled for higher current?
A: No, current sharing isn’t supported. Use a dedicated regulator for loads exceeding 3A.

Q: How do I set the output voltage?
A: Use external resistors connected to the FB pin. Calculation tools are in the datasheet.

Q: Is the enable pin TTL/CMOS compatible?
A: Yes, it accepts standard logic levels (active high).

Q: What’s the typical quiescent current?
A: 1.2mA (typical) when enabled with no load, optimizing battery-operated designs.

Q: Does PCX provide technical documentation?
A: Yes, download the full TPS74401RGWR datasheet directly from our product page.

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