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Blog
Thursday, July 24, 2008
austiamicrosystems AS7620: 500-mA buck regulator provides an integrated dual-power monitor
Jul 24 2008 11:01AM | Permalink | Email this | Comments (0) |
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Suiting 24V utility metering, sensor interfacing, and other industrial motion-control and battery-powered data-acquisition equipment, the AS7620 hysteretic 32V step-down regulator provides early-power-fail warning and power-good signals to microcontrollers. The 500-mA buck regulator provides an integrated dual-power monitor, a fixed 3.3V output or an adjustable output-voltage of 1.2V to the input voltage. The regulator provides soft-start, current limiting, and thermal shutdown, drawing a 1-mA current during shutdown. Claiming 93% efficiency, the device integrates a 100% duty cycle, extending operation in low-dropout conditions. A pin-selectable peak-current limit reduces component size by adjusting inductor selection. Operating over a –40 to +85°C industrial-temperature range, the regulator also provides 37-µA operation when delivering 500-µA output current. Available in a 4×4-mm MLPQ-12 package, the AS7620 dc/dc converter costs $1.36.
austriamicrosystems, www.austriamicrosystems.com
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