TDK FS3305 µPOL™ Buck Regulator

TDK FS3305 µPOL™ Buck Regulator is an easy-to-use, fully integrated, and highly efficient micro-Point-Of-Load (µPOL™) voltage regulator. This buck regulator features an on-chip Pulse-Width Modulation (PWM) controller and integrated MOSFETs, incorporates an inductor, resulting in an extremely compact and accurate regulator. The FS3305 regulator operates over a 2.75V to 5.5V input voltage range and a 0.4V to 3.3V adjustable output voltage range with ±0.5% initial accuracy. This regulator built-in protection features include soft-start protection, over-voltage protection, thermally compensated overcurrent protection with hiccup mode, and thermal shutdown with auto-recovery. The FS3305 regulator is ideal for optical networking systems, FPGAs, ASICs, SoCs, storage requirements, industrial applications, LDO replacement at high efficiency, drones, robotics, IoT, and portable devices.

The FS3305 µPOL™ buck regulator features a low-profile package, making it suitable for automated assembly using standard surface-mount equipment. This buck regulator is lead-free, halogen-free, and compliant with EU Directives REACH and RoHS.

Features

  • µPOL™ package with output inductor included
  • 2.5mm x 2.5mm x 1.2mm small size
  • 5A load continuous capability
  • Plug and play with no external compensation required
  • 2.75V to 5.5V input voltage range
  • 0.4V to 3.3V adjustable output voltage range
  • ±0.5% initial accuracy
  • Enable and Power Good (PG)
  • Over-current and short circuit protection
  • Open-drain power-good indicator
  • -40°C to 125°C operating temperature range
  • Lead-free and halogen-free
  • Compliant with EU directives REACH and RoHS

Applications

  • Optical networking systems
  • FPGA, ASIC, and SOC
  • Storage devices
  • Industrial devices
  • LDO replacement at higher efficiency
  • Drones, robotics, and IOT devices
  • Portable devices

Typical Application Circuit Diagram

Application Circuit Diagram - TDK FS3305 µPOL™ Buck Regulator

Efficiency Characteristics

TDK FS3305 µPOL™ Buck Regulator

Dimensions

Mechanical Drawing - TDK FS3305 µPOL™ Buck Regulator
Published: 2026-05-20 | Updated: 2026-05-25