New DC/DC converters simplify design and reduce board real estate

The 1MHz ZMDI ZSPM401x product line comprises three families and 18 products: the ZSPM4011 1A family, the ZSPM4012 2A family, and the ZSPM4013 3A family. Due to their high level of integration, the ICs require only 4 external devices – 3 capacitors and 1 inductor. Each family comes in fixed-output voltage options of 1.5, 1.8, 2.5, 3.3 and 5 volts to reduce external part counts, while allowing for quick part selection and easy design. An input voltage range of 6V – 24 V (3A option is 6V to 20V) lets designers target more applications with one basic “cookie-cutter” design technique.

Each family also offers a variable output voltage option of 0.9V to 5V for maximum part flexibility. At 5V in and 1.8V out, the parts offer 90% efficiency. At 6V in and 3.3V out, efficiency increases to 93%. The high efficiency of the design eliminates the need for any external thermal protection. Additional features are input supply under-voltage lockout, soft-start for controlled startup with no overshoot, and full protection for over-current, over-temperature, and Vout over-voltage.

Synchronous switching at 1MHz (+/- 10%) and internal compensation minimizes the number and size of external parts, minimizing board real estate. A typical, low standby mode of 5uA maximizes energy efficiency while reducing the application”s power budget. All of the ICs are designed to operate over a robust temperature range from -40 to +125 degrees C.

Target applications for these devices span an array of consumer and communications products, including notebooks, tablets, smart phones, portable GPS systems, printers, cable modems, voice-over-IP (VOIP) phones, and wireless access points based on the IEEE802.11 wireless local-area-network (LAN) standard.


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