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Part No UC3874DW-2
Manufacturer Texas Instruments
Catalog Electronic Wholesale
Description High Efficiency, Synchronous, Step-down Buck Controllers | IC REG CTRLR BUCK 18SOIC

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Pricing & Ordering $53.1558 Historical reference price : is the price that a customer announces that it is willing to pay for this component in the previous period, only for reference.
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Availability: 2,500 pieces
Order Increment : 1 pcs
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Products specifications

Categories Integrated Circuits
Manufacturer Texas Instruments
Packaging Tube
Status Obsolete
Output Type Transistor Driver
Function Step-Down
Topology Buck
Output Phases 1
Supply Voltage 4.4V ~ 36V
Switching Frequency Up to 300kHz
Duty Cycle (Maximum) 100%
Synchronous Rectifier Yes
Clock Sync No
Control Features Soft Start
Temperature Range - Operating 0°C ~ 70°C
Manufacturer Package 18-SOIC
Supplier Device Package 18-SOIC
Family Part Number UC3874-2
Manufacturer Pack Quantity 40
MSL Level 2 (1 Year)
Win Source Part Number 1276031-UC3874DW-2
Manufacturer Homepage
Popularity Medium
Fake Threat In the Open Market 45 pct.
Supply and Demand Status Limited


Overview of Texas Instruments UC3874DW-2

The UC3874DW-2 from Texas Instruments is a sophisticated integrated circuit designed for power factor correction (PFC) and precise power supply control. This device is part of the UC3874 series, which is renowned for its high-efficiency and reliable performance in managing and optimizing power systems.

Key Features

  • Integrated Control Functions: The UC3874DW-2 incorporates all the necessary control functions for a power factor correction pre-regulator. This level of integration simplifies the design process and enhances system reliability.
  • Wide Input Voltage Range: It is capable of handling a broad input voltage range, making it suitable for a variety of applications across different power levels and geographical regions.
  • Frequency Synchronization: The device can synchronize to an external clock, allowing for noise-sensitive applications to minimize electromagnetic interference by coordinating switching frequencies across multiple devices.
  • Low Power Dissipation: Designed with efficiency in mind, the UC3874DW-2 helps to reduce power dissipation, which is crucial for enhancing the longevity and reliability of the power system.
  • Soft Start Capability: The inclusion of a soft-start feature minimizes inrush current during startup, which can prevent system stress and extend the lifespan of other components.


The UC3874DW-2 is versatile and can be used in a wide array of applications, including:

  • AC-DC power supplies
  • Power adapters for laptops and personal computers
  • Telecommunications equipment
  • Industrial power systems
  • Energy-efficient and green power solutions

Product Packaging and Availability

The UC3874DW-2 is available in a 24-pin SOIC (Small Outline Integrated Circuit) package, which is suitable for surface-mount technology (SMT). This packaging allows for compact and space-efficient designs in printed circuit boards (PCBs).

As a product of Texas Instruments, a leader in semiconductor solutions, the UC3874DW-2 is backed by robust technical support and documentation, ensuring that engineers can integrate this component into their designs with confidence and achieve optimal performance.

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