Zentrum Mikroelektronik Dresden AG (ZMDI), a supplier of analog and mixed-signal solutions for automotive, industrial, and medical applications, has announced a new family of 1, 2, and 3A current-mode synchronous buck DC/DC converter integrated circuits (ICs) tailored for ease of design, quick product development, and low bill of materials (BOM) costs.
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.
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 - 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 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.
“We created the ZSPM401x families with three objectives in mind: High feature integration, and flexibility that lead to quick design, low external component count and small application footprints. The power input and output voltage ranges are highly efficient, giving these parts what we think is the best power consumption available," said Bernhard Huber, BL Manager, ZMDI.