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LM22670MRE-ADJ Folha de dados(PDF) 4 Page - National Semiconductor (TI) |
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LM22670MRE-ADJ Folha de dados(HTML) 4 Page - National Semiconductor (TI) |
4 / 20 page Pin Descriptions Pin Numbers PSOP-8 Package Pin Numbers TO-263 THIN Package Name Description Application Information 1 3 BOOT Bootstrap input Provides the gate voltage for the high side NFET. 2 - NC Not Connected Pin is not electrically connected inside the chip. Pin does function as thermal conductor. 3 5 RT/ SYNC Oscillator frequency adjust pin or frequency synchronization A resistor connected from this pin to GND adjusts the oscillator frequency. This pin can also accept an input for synchronization from an external clock. Pin can be left floating and internal setting will be default to 500 kHz. 4 6 FB Feedback pin Inverting input to the internal voltage error amplifier. 5 7 EN Precision enable pin When pulled low regulator turns off. 6 4 GND System ground Provide good capacitive decoupling between VIN and this pin. 7 2 VIN Source input voltage Input to the regulator. Operates from 4.5V to 42V. 8 1 SW Switch pin Attaches to the switch node. www.national.com 4 |
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