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CMOS LDO Regulators with Auto Power-Saving Function

Wed, 08/26/2009 - 8:24am
ROHM Semiconductor announces a new series of CMOS LDO regulators featuring the company's proprietary automatic power-saving (APS) function that dynamically switches performance characteristics based on operating conditions.

The BHxxPB1 Series combines the benefits of LDOs - small packaging, minimal external components and simple design process - with very low average power consumption. During high-speed operation, with operating current of 20 µA, the output voltage is regulated to ±1% over step load changes. In the power-save mode, the operating current is reduced to 2 µA. These devices are particularly useful in portable applications such as cell phones where lower average current consumption can aid in extending battery life.

The PB1 series is offered in nine models with fixed output voltages ranging from 1.2 V to 3.3 V. Models in the series feature a built-in shutdown function, 8 kV ESD protection, and foldback over-current and thermal protection.

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