DC/DC power module in compact 7x9x4mm QFN package

23rd August 2018
Enaie Azambuja

Texas Instruments' LMZM33603 power module is an easy-to-use integrated power solution that combines a 3A, step-down, DC/DC converter with power MOSFETs, a shielded inductor, and passives into a low-profile package. This power solution requires as few as four external components and eliminates the loop compensation and magnetics part selection from the design process.

The 9mm × 7mm × 4mm 18-pin, QFN package is easy to solder onto a printed circuit board and allows a compact, low-profile, point-of-load design. The full feature set, including power good, programmable UVLO, prebias start-up, and overcurrent and over-temperature protection, make the LMZM33603 an excellent device for powering a wide range of applications.


  • Complete Integrated Power Solution
  • As Few as 4 External Components
  • Minimum Solution Size < 100mm2
  • 9mm × 7mm × 4mm QFN Package
  • All Pins Accessible from Package Perimeter
  • Pin Compatible with 2A LMZM33602
  • Input Voltage Range: 4V to 36V
  • Output Voltage Range:
  • 1V to 13.5V at 3A
  • 1V to 18V at 2A
  • Efficiencies Up To 95%
  • Adjustable Switching Frequency
  • (200kHz to 1.2MHz)
  • Allows Synchronisation to an External Clock
  • Power-Good Output
  • Meets EN55011 Class B Radiated EMI Standards
  • Operating IC Junction Range: –40°C to +125°C
  • Operating Ambient Range: –40°C to +105°C
  • Create a Custom Design Using the LMZM33603 With the WEBENCH® Power Designer

Discover more here.

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