UC3874DW-2 Texas Instruments Integrated Circuit (Small Outline Packages) In Stock
The UC3874DW-2 is a high-efficiency synchronous step-down (buck) switching controller IC from Texas Instruments, using current-mode PWM control with a 12V to 36V input range in an 18-pin SOIC package. It drives external MOSFETs for high-current synchronous rectification and improved conversion efficiency. Available from stock with worldwide shipping.
- Manufacturer
- Texas Instruments
- Package
- Small Outline Packages
- Pin Count
- 18
- Lifecycle
- OBSOLETE
- Datasheet
- UC3874DW-2 Datasheet PDF
- Category
- Integrated Circuit
- Temp Range
- ?°C to 70.0°C
- RoHS
- Compliant
- Lead Time
- 3–7 business days
- Shipping
- DHL Express · Worldwide
Key Features
- High-efficiency synchronous buck controller using current-mode PWM for superior transient response and tight regulation
- Wide 12V to 36V input voltage range supporting telecom, server, and industrial power supply designs
- External MOSFET drive architecture enabling high-current output and customizable efficiency optimization
- 18-pin SOIC package (R-PDSO-G18) balancing component density and thermal management on standard PCBs
- Lead-free and RoHS-compliant (JESD-609 Code e4) for environmentally responsible production
Applications
The UC3874DW-2 is well-suited for high-efficiency DC-DC power conversion in telecom infrastructure, server power supplies, and industrial motor drives requiring synchronous step-down regulation from a 12V to 36V bus. It is also used in distributed power architectures and point-of-load converters where driving external MOSFETs enables fine-tuned efficiency and thermal management.
Specifications
| Pbfree Code | Yes |
| YTEOL | 0 |
| Analog IC - Other Type | SWITCHING CONTROLLER |
| Control Mode | CURRENT-MODE |
| Control Technique | PULSE WIDTH MODULATION |
| Input Voltage-Max | 36V |
| Input Voltage-Min | 12V |
| Input Voltage-Nom | 12V |
| JESD-30 Code | R-PDSO-G18 |
| JESD-609 Code | e4 |
| Number of Functions | 1 |
| Output Current-Max | 1A |
| Package Body Material | PLASTIC/EPOXY |
| Package Equivalence Code | SOP18,.4 |
| Package Shape | RECTANGULAR |
| Package Style | SMALL OUTLINE |
| Peak Reflow Temperature (Cel) | 260 |
| Qualification Status | Not Qualified |
| Supply Current-Max (Isup) | 12mA |
| Surface Mount | YES |
| Switcher Configuration | PUSH-PULL |
| Switching Frequency-Max | 300kHz |
| Technology | BIPOLAR |
| Temperature Grade | COMMERCIAL |
| Terminal Finish | NICKEL PALLADIUM GOLD |
| Terminal Form | GULL WING |
| Terminal Pitch | 1.27mm |
| Terminal Position | DUAL |
| Time@Peak Reflow Temperature-Max (s) | 30 |
| Package | Small Outline Packages |
Compliance & Regulatory
| RoHS Status | Compliant |
| Lead-Free | Yes (Pb-Free) |
| Moisture Sensitivity Level | MSL 2 |
| ECCN | EAR99 |
| HTS Code | 8542.39.00.60 |
Alternate & Equivalent Parts
Compatible alternatives and drop-in replacements for UC3874DW-2:
Rochester Electronics LLC 1A SWITCHING CONTROLLER, 300kHz SWITCHING FREQ-MAX, PDSO18, GREEN, SOIC-18
Switching Controller, Current-mode, 1A, 300kHz Switching Freq-Max, BIPolar, PDSO18
Frequently Asked Questions
What is the input voltage range of the UC3874DW-2?
The UC3874DW-2 operates with an input voltage ranging from 12V minimum to 36V maximum, with a nominal input of 12V. This range is well-matched for telecom, 24V industrial bus, and server power supply environments requiring step-down regulation.
What control mode does the UC3874DW-2 use?
The UC3874DW-2 uses current-mode pulse width modulation (PWM) control, which enables fast load transient response, inherent peak-current limiting, and simplified loop compensation compared to voltage-mode control topologies.
What package does the UC3874DW-2 come in?
The UC3874DW-2 is packaged in an 18-pin Small Outline IC (SOIC), with JESD-30 code R-PDSO-G18. This surface-mount package provides a good balance between pin count, PCB space, and ease of assembly in power supply designs.
Is the UC3874DW-2 suitable for synchronous rectification designs?
Yes, the UC3874DW-2 is specifically designed as a synchronous step-down (buck) controller, driving both high-side and low-side external MOSFETs to achieve synchronous rectification, significantly reducing conduction losses and improving overall conversion efficiency compared to diode-based rectification.
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About Texas Instruments
Texas Instruments (TI) is a global semiconductor company headquartered in Dallas, Texas. TI designs and manufactures analog and embedded processing chips used in industrial, automotive, consumer, communications, and enterprise systems.
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