Ultra-small DC-DC power modules extended to 4V to 60V inputs

New Products |
By Nick Flaherty

While miniaturisation is still a drive for a wide range of system designs, many also require a wide range of input voltages. For example, supply voltages in factory automation equipment are susceptible to large fluctuations due to long transmission lines. USB-C and broad 12V nominal applications require up to 24V of working voltage protection against transients due to hot plugging of supplies and/or batteries.

The newest Himalaya uSLIC power modules extend the portfolio’s range up to 60V versus the previous maximum of 42V and come in a solution size (2.6mm x 3.0mm x 1.5mm) less than half the size of other modules. The MAXM17552, MAXM15064, MAXM17900 and MAXM17903 step-down DC-DC power modules combine a synchronous wide-input Himalaya buck regulator with built-in FETs, compensation and other functions with an integrated shielded inductor. Having the inductor in the module simplifies the toughest aspect of power supply design, enabling designers—even those with little power expertise—to quickly and easily create a robust, reliable power supply.

The MAXM17552 is a 4 to 60V, 100mA module with 100 to 900kHz adjustable switching frequency, 82% efficiency (24V VIN at 5V/0.1A) and external clock synchronization in the uSLIC 2.6mm x 3mm x 1.5mm package, while the MAXM15064 handles 300mA with a 500kHz fixed frequency, 82% efficiency (24V VIN at 5V/0.1A) and built-in output voltage monitoring. The  MAXM17900 covers 4 to 24V in a 100mA module with 100 to 900kHz adjustable switching frequency, 86% efficiency (12V VIN at 5V/100mA), external clock synchronization and built-in output voltage monitoring while the  MAXM17903 supports 4.5 to 24V in a 300mA module with 500kHz fixed switching frequency, 77% efficiency (12V VIN at 3.3V/300mA) and built-in output voltage monitoring.

One of the toughest design challenges for inexperienced designers is to choose an inductor which will meet the power, size, emission and temperature requirements for a given design. The Himalaya uSLIC modules have an integrated shielded inductor which conforms to the standards of the datasheet, meeting all electrical requirements and allowing designers to build a power supply in a few hours. Getting a fully working power supply can be as easy as choosing the input and output capacitor and setting the output voltage through the resistor divider network.

The modules are also compliant to CISPR 22 (EN 5022) Class B EMI, eliminating the need for power supply redesigns; JEDEC certified to withstand drop, shock and vibration. EE-Sim models are available at

“As power requirements evolve for personal products to factories embracing Industry 4.0, we are committed to delivering the best solutions possible to further innovation. The new uSLIC Himalaya products are poised to play a key role in this arena,” said Viral Vaidya, director of business management, Industrial Power Business Unit at Maxim Integrated. 

The MAXM17552 is available for for $2.53, MAXM15064 for $2.78, MAXM17900 for $1.39, and MAXM17903 for $1.48 (1000-up, FOB USA). The MAXM17552EVKIT#, MAXM15064EVKIT#, MAXM17900EVKIT#and MAXM17903EVKIT# evaluation kits are available at $29.73 each.

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