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AT32UC3A0512 Datasheet(PDF) 18 Page - ATMEL Corporation |
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AT32UC3A0512 Datasheet(HTML) 18 Page - ATMEL Corporation |
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18 / 98 page  18 AT32UC3A 7.2 Voltage Regulator 7.2.1 Single Power Supply The AT32UC3A embeds a voltage regulator that converts from 3.3V to 1.8V. The regulator takes its input voltage from VDDIN, and supplies the output voltage on VDDOUT. VDDOUT should be externally connected to the 1.8V domains. Adequate input supply decoupling is mandatory for VDDIN in order to improve startup stability and reduce source voltage drop. Two input decoupling capacitors must be placed close to the chip. Adequate output supply decoupling is mandatory for VDDOUT to reduce ripple and avoid oscil- lations. The best way to achieve this is to use two capacitors in parallel between VDDOUT and GND as close to the chip as possible Refer to Section 12.3 on page 42 for decoupling capacitors values and regulator characteristics 7.2.2 Dual Power Supply In case of dual power supply, VDDIN and VDDOUT should be connected to ground to prevent from leakage current. 3.3V 1.8V VDDIN VDDOUT 1.8V Regulator C IN1 C OUT1 C OUT2 C IN2 VDDIN VDDOUT 32058KS–AVR32–01/12 |
Similar Part No. - AT32UC3A0512_14 |
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Similar Description - AT32UC3A0512_14 |
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