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Small & Powerful. TDK's µPOL™ DC-DC Converter

Main Title

TDK's µPOL ™ DC-DC converter, supplying 15W in a 3.3x3.3x1.5mm package


The small and powerful solution for powering your FPGAs

This tiny power module is an easy-to-use, fully integrated and highly efficient micro-point-of-load (µPOL™) voltage regulator. The on-chip pulse-width modulation (PWM) controller and integrated MOSFETs, plus incorporated inductor and capacitors, result in an extremely compact and accurate regulator. The compact, low-profile package measures in at a tiny 3.3mm x 3.3mm x 1.5mm and is suitable for automated assembly using standard surface-mount equipment.

Developed by a cross-functional engineering team, the design exemplifies best practice and uses class-leading technologies. From early in the integrated circuit design phase, designers worked with application and packaging engineers to select compatible technologies and implement them in ways that reduce compromise. µPOL devices are configurable for a vast range of applications using Inter-Integrated Circuit (I2C) protocol, which is unique to this class of components. Developing and optimizing all of these elements together has yielded the smallest, most efficient and fully featured µPOL™ currently available.

TDK FS1406 µPOL™ buck regulator

The built-in protection features include pre-biased start-up, soft-start protection, over-voltage protection, thermally compensated over-current protection with hiccup mode, thermal shut-down with auto-recovery.





  • µPOL™ package with output inductor included
  • Small size: 3.3mm x 3.3mm x 1.5mm
  • Continuous 6A load capability
  • Plug and play: no external compensation required
  • Programmable operation using the I2C serial bus (fast mode and fast mode plus)
  • Wide input voltage range: 4.5–16V for single supply and 2.5-16V for dual supply
  • Adjustable output voltage: 0.6–2.5V, ±0.5% initial accuracy
  • Enabled input, programmable under-voltage lock-out (UVLO) circuit
  • Open-drain power-good indicator
  • Built-in protection features
  • Operating temperature from -40°C to +125°C
  • Lead-free and halogen-free
  • Compliant with EU Directives REACH and RoHS 6 
  • Evaluation boards on all fixed voltages available

Applications Table

  • Storage applications
  • Telecom and networking applications
  • Industrial applications
  • Server applications
  • Distributed point-of-load power architectures
  • Computing peripheral voltage regulation
  • General DC-DC conversion


Model Number Fixed VOUT I/O max Evaluation board
FS1403-3300-AL 3.30V 3A EV1403-5000-A
FS1403-3300-AS 3.30V 3A
FS1403-5000-AL 5.0V 3A
FS1403-5000-AS 5.0V 3A
FS1404-2500-AL 2.50V 4A EV1404-3300-A
FS1404-2500-AS 2.50V 4A
FS1404-3300-AL 3.30V 4A
FS1404-3300-AS 3.30V 4A
FS1406-0600-AL 0.60V 6A EV1406-1800-A
FS1406-0600-AS 0.60V 6A
FS1406-0700-AL 0.70V 6A
FS1406-0700-AS 0.70V 6A
FS1406-0750-AL 0.75V 6A
FS1406-0750-AS 0.75V 6A
FS1406-0800-AL 0.80V 6A
FS1406-0800-AS 0.80V 6A



TDK MicroPOL Model Numbers-Table

Model Number Fixed VOUT I/O max Evaluation board
FS1406-0900-AL 0.90V 6A EV14061800-A
FS1406-0900-AS 0.90V 6A
FS1406-1000-AL 1.0V 6A
FS1406-1000-AS 1.0V 6A
FS1406-1050-AL 1.05V 6A
FS1406-1050-AS 1.05V 6A
FS1406-1100-AL 1.10V 6A
FS1406-1100-AS 1.10V 6A
FS1406-1200-AL 1.20V 6A
FS1406-1200-AS 1.20V 6A
FS1406-1800-AL 1.10V 6A
FS1406-1800-AS 1.80V 6A
FS1406-2500-AL 2.50V 6A
FS1406-2500-AS 2.50V 6A



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FS1406 datasheet GBD


FS1406, FS1404 and FS1403

Download the FS1406, FS1404 and FS1403 series µPOL™ buck regulator datasheets for full technical and design specifications.


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