Datenblatt-Suchmaschine für elektronische Bauteile |
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LM2631MTC-ADJ Datenblatt(PDF) 6 Page - National Semiconductor (TI) |
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LM2631MTC-ADJ Datenblatt(HTML) 6 Page - National Semiconductor (TI) |
6 / 12 page Connection Diagram and Ordering Information Pin Description Pin Name Function 1SD Shutdown control input, active low. 2 SYNC Oscillator synchronization input. Connect this pin to ground if not used. 3 PGOOD A constant monitor on the output voltage. PGOOD will go low if the output voltage exceeds ±9% of its nominal value. Once PGOOD goes low, it will go high if the output moves within ±3% of its nominal value. 4 SS The soft-start control pin. A capacitor connected from this pin to ground sets the ramp time to full current output. 5 COMP Compensation network connection (connected to the output of the voltage error amplifier). 6 FB Output voltage feedback input (connected to the center of the external resistor divider). 7 FADJ Frequency adjustment input. 8 VREF The output of the precision reference. 9 GND Low-noise analog ground. 10 CSH Current-sense positive input. 11 CSL Current-sense negative input. 12 NC No internal connection. 13 V IN Main power supply pin. 14 NC No internal connection. 15 FPWM When FPWM is high, pulse-skipping mode operation at light load is disabled. The converter is forced to operate in constant frequency mode. 16 PGND Power ground. 17 LDRV Low-side gate-drive output. 18 CBOOT Bootstrap capacitor connection for high-side gate drive. 19 SW Switched-node connection, which is connected with the source of the high-side MOSFET. 20 HDRV High-side gate-drive output. HDRV is a floating drive output that rides on SW voltage. 20-Lead TSSOP (MTC) DS100937-2 Top View Order Number LM2631MTC-ADJ See NS Package Number MTC20 www.national.com 6 |
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