Switching Controllers HI EFF LOW-SIDE N CH CONTROLLER A 926-LM3481MMX/NOPB

LM3481MM/NOPB – High-Efficiency Low-Side N-Channel Controller – Texas Instruments

Optimize your power systems with the LM3481MM/NOPB switching controller from Texas Instruments, engineered for efficient voltage conversion in space-constrained designs. This versatile IC delivers precise power management with adjustable frequency up to 1MHz, wide input voltage support (2.97V–48V), and robust thermal performance. PCX guarantees authentic Texas Instruments components with rapid shipping and dedicated technical support.

Key Features

• Function: Step-Up/Step-Down Voltage Conversion
• Topology: Boost, Flyback, or SEPIC Configurations
• Switching Frequency: Adjustable 100kHz–1MHz
• Voltage Range: 2.97V to 48V Input
• Output Driver: Transistor Driver for N-Channel MOSFETs
• Control Features: Enable Pin, Frequency Control, Soft Start
• Package: 10-VSSOP (3mm Width) Surface-Mount
• Temperature Range: -40°C to +125°C (TJ)

Technical Specifications

The LM3481MM/NOPB operates as a single-output controller with positive configuration, supporting duty cycles up to 85%. It includes clock synchronization capability and advanced control features like ramp compensation for stability. The compact 10-MSOP package ensures reliability in industrial environments while minimizing board space. Synchronous rectification is not integrated, providing design flexibility for external components.

Typical Applications

• Industrial Power Supplies & SMPS Designs
• Automotive DC-DC Conversion Systems
• Battery-Powered/Portable Electronics
• LED Driver Circuits & Backlight Modules
• Telecom Infrastructure Power Management

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, reliability, and thermal performance, serving mission-critical applications from automotive to industrial automation.

TI’s rigorous quality control and extensive R&D investment ensure components like the LM3481 meet stringent operational demands. Engineers worldwide trust TI solutions for long-term design stability and comprehensive technical documentation, including datasheets and reference designs available through PCX.

About DC-DC Switching Controllers

DC-DC switching controllers regulate voltage conversion efficiently by rapidly switching transistors, minimizing energy loss compared to linear regulators. They are essential in modern electronics where varying input voltages (e.g., batteries or unstable sources) require stable output for sensitive components.

Controllers like the LM3481MM/NOPB offer design flexibility through adjustable parameters like frequency and duty cycle. Their ability to handle step-up (boost), step-down (buck), or combined topologies makes them indispensable in power supplies, renewable energy systems, and mobile devices demanding high efficiency in compact footprints.

Packaging Options

Available in industry-standard formats: Tape & Reel (TR), Cut Tape (CT), or Digi-Reel®. Specify your preference during checkout for automated assembly readiness.

FAQs

Q: What is the primary advantage of this controller vs. integrated regulators?
A: It provides greater flexibility through external MOSFET selection, enabling higher current handling and thermal management customization.

Q: Can I synchronize multiple LM3481 controllers?
A: Yes, the clock sync feature allows synchronization to an external oscillator for noise-sensitive applications.

Q: Is soft-start functionality included?
A: Yes, integrated soft-start prevents inrush current during startup, protecting connected components.

Q: What magnetics are recommended for SEPIC designs?
A: Coupled inductors meeting the calculated inductance value – refer to TI’s datasheet for design guidelines.

Q: Does it require external compensation?
A: Yes, external compensation networks optimize stability across load/line conditions.

Q: Is this IC RoHS compliant?
A: Yes, the LM3481MM/NOPB meets all RoHS 3 environmental standards.

Note: Product images are representational; refer to datasheets for exact dimensions.

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