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AAT1151 Datasheet(PDF) 2 Page - Advanced Analogic Technologies |
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AAT1151 Datasheet(HTML) 2 Page - Advanced Analogic Technologies |
2 / 16 page AAT1151 850kHz 700mA Synchronous Buck DC/DC Converter 2 1151.2007.01.1.6 Pin Descriptions Pin Configuration MSOP-8 QFN33-16 (Top view) (Top view) VP VP VP PGND PGND PGND 1 2 3 4 12 11 10 9 VCC FB LX PGND LX VP FB SGND EN VCC 1 2 3 4 8 7 6 5 Pin # MSOP-8 QFN33-16 Symbol Function 1 4 FB Feedback input pin. This pin is connected to the converter output. It is used to set the output of the converter to regulate to the desired value via an internal resistive divider. For an adjustable output, an external resistive divider is connected to this pin on the 1V model. 2 5, 6 SGND Signal ground. Connect the return of all small signal components to this pin. (See board layout rules.) 3 7 EN Enable input pin. A logic high enables the converter; a logic low forces the AAT1151 into shutdown mode reducing the supply current to less than 1μA. The pin should not be left floating. 4 9 VCC Bias supply. Supplies power for the internal circuitry. Connect to input power via low pass filter with decoupling to SGND. 5 10, 11, 12 VP Input supply voltage for the converter power stage. Must be closely decoupled to PGND. 6, 7 13, 14, 15 LX Connect inductor to these pins. Switching node internally connected to the drain of both high- and low-side MOSFETs. 8 1, 2, 3 PGND Main power ground return pin. Connect to the output and input capacitor return. (See board layout rules.) 8, 16 NC Not internally connected. EP Exposed paddle (bottom); connect to PGND directly beneath package. |
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