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austriamicrosystems introduces the AS1325, a high efficiency step-up DC/DC converter with a fully integrated synchronous rectifier. With an efficiency of 96%, the AS1325 is suited for battery-powered portable applications with the need for 3.3 or 5.0V supply voltage. The AS1325 provides a supply voltage of 1.5 to 3.5V (for 3.3V output voltage) or 1.5 to 5.0 V (for 5.0 V output voltage). Supplied with less than 2 V, the AS1325 is capable of delivering a 300 mA output current at 5.0 V output voltage or 185 mA at 3.3 V output voltage. The device features a shutdown mode where it draws less than 1 µA. In this mode, the battery is connected directly to the output to enable direct battery feed-through. This enables the input battery to be used as backup or as a real-time clock supply when the converter is off and eliminates the need for an expensive back-up battery.

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