XH2576-3.3 – DC-DC Converter – Xinluda

The XH2576-3.3 from Xinluda is a monolithic 3.3V fixed-output, 3A step-down (buck) switching regulator in a TO-263-5 package, operating at a 52kHz fixed frequency with built-in current limit and thermal shutdown.

The XH2576-3.3 is a monolithic step-down (buck) switching regulator from Xinluda Information Technology Co., Ltd. It integrates all of the active functions required for a fixed 3.3V output DC-DC converter capable of driving up to 3A of load current with excellent line and load regulation. As part of the XH2576 family — a function-compatible alternative to the industry-standard LM2576 — it requires only a minimal number of external components and a standard inductor, making it a compact, high-efficiency replacement for traditional three-terminal linear regulators.

With an internal fixed-frequency oscillator running at 52kHz, on-chip frequency compensation, cycle-by-cycle current limiting, and thermal shutdown, the XH2576-3.3 delivers reliable point-of-load power conversion across a wide input range while keeping the bill of materials and heatsink requirements low.

Key Features

• Fixed 3.3V output voltage
• Up to 3A output (load) current
• Wide input voltage range of 6V to 40V
• 52kHz internal fixed-frequency oscillator
• Output voltage tolerance of ±4% over specified line and load conditions
• Step-down (buck) switching topology with internal frequency compensation
• Cycle-by-cycle current limiting and thermal shutdown protection
• Minimal external component count; uses readily available standard inductors
• TO-263-5 surface-mount package
• Operating junction temperature range of -40°C to +125°C

Applications

• Step-down (buck) switching power supplies
• On-board point-of-load 3.3V regulation
• High-efficiency replacement for linear regulators
• Industrial and consumer embedded systems
• High-efficiency pre-regulators for linear regulators

Why Source XH2576-3.3 from Pacific Component Xchange

The XH2576-3.3 can be difficult to source through authorized Western distribution channels, which makes consistent supply a challenge for production and maintenance teams. Pacific Component Xchange is an independent distributor specializing in hard-to-find and obsolete power-management ICs and optocouplers. We help engineers and buyers secure difficult-to-locate components like the XH2576-3.3 with a focus on authenticity, quality verification, and reliable global shipping.

Whether you need a single reel or volume quantities, our team can source this device and offer alternatives where appropriate. Request a quote (RFQ) today and let Pacific Component Xchange handle the hard-to-find sourcing so your build stays on schedule.