Step-down converters with more than 90% efficiency and current consumption of only 12 µA in standby operation

by donpedro

MSC now offers the E522.7x family of step-down (buck) converters from Elmos. The E522.7x family features a high efficiency rate of more than 90% and low current consumption of only 12µA in standby mode, and 8 µA in sleep mode.
The new E522.7x family of converters comprises nine devices and is designed for an input voltage range between 4.5V and 40V. Models with 3V, 5V or variable output voltage from 1.5V up to almost the input voltage at 100% duty cycle are available. Depending on the model, the maximum output current is 350mA, 500mA or 1A. Due to the integrated power MOSFETs, only a very limited number of external components are required. The Pulse Frequency Modulation (PFM) regulators operate at up to 1.33MHz and achieve outstanding response times, stability and high efficiency over the entire voltage and output current ranges. The idle detection automatically switches to the idle mode with a current consumption of typically 8 µA if either no switching activity occurred for longer than typically 110 μs or the duty cycle of the converter falls below a limit of typically 1:72.

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