5-A buck regulator offers switching frequencies up to 4-MHz with efficiency to 95 percent

5-A buck regulator offers switching frequencies up to 4-MHz with efficiency to 95 percent

New Products |
By eeNews Europe

The Vishay Siliconix SiP12108 features integrated high- and low-side power MOSFETs in the space-saving 3 mm by 3 mm QFN-16 package, providing designers with a complete high-current solution in 180 mm².

The high switching frequencies of the SiP12108 enable a compact design with minimal components, making the device ideal for point of load regulation and 3.3 V and 5 V rails in a wide range of space-constrained computing, consumer electronics, telecom, and industrial applications. Typical end products will include low-power processors, network processors, DSPs, FPGAs, ASICs, high-density storage cards, set-top boxes, DVRs, LAN/WAN equipment, and more.

The device released today provides an input voltage range of 2.8 V to 5.5 V and adjustable output voltage down to 0.6 V with ± 1% accuracy while a selectable power-saving mode enables efficiency to 95% across the full range of load current. The SiP12108’s current-mode constant on-time (CM-COT) architecture delivers ultra-fast transient response with minimum output capacitance and tight ripple regulation at light loads.

The SiP12108 offers a full protection feature set, including output undervoltage and overvoltage protection, thermal shutdown, input undervoltage lockout, internal soft start, and a power good indicator. An ‘A’ version of the device, the SiP12108A, is available with the output undervoltage protection feature disabled. To simplify designs, the RoHS-compliant, halogen-free regulator is stable with any capacitor type and does not require an ESR network for loop stability.

Offering an easy migration path to higher currents, the SiP12108 is footprint-compatible with Vishay’s 3 A SiP12107. The company’s free PowerCAD online simulation tool provides designers with a fast and convenient way to test and optimize circuits utilizing the SiP12107, SiP12108, SiP12108A, or any other product in the microBUCK DC/DC family. The tool is available at


Samples and production quantities of the SiP12108 are available now, with lead times of 10 to 12 weeks for larger orders.

More information about the SiP12108/SiP12108A synchronous buck regulators at

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