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LM3880MF-1AB Datasheet(PDF) 4 Page - National Semiconductor (TI) |
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LM3880MF-1AB Datasheet(HTML) 4 Page - National Semiconductor (TI) |
4 / 20 page Connection Diagram 30025503 12-pin micro SMD package Pin Descriptions Pin Number Symbol Name and Function A1 PGND Power Ground pin A2 SW Switching node connection to the internal PFET switch and NFET synchronous rectifier. A3 FB_DCDC Feedback analog input for the DC-DC converter. Connect to the output filter capacitor. B1 V BATT Power supply input for switcher. Connect to the input filter capacitor. B2 EN_LILO Enable input for the linear regulator. The linear regulator is in shutdown mode if voltage at this pin is < 0.4V and enabled if > 1.1V. Do not leave this pin floating. B3 EN_DCDC Enable input for the DC-DC converter. The DC-DC converter is in shutdown mode if voltage at this pin is < 0.4V and enabled if > 1.1V. Do not leave this pin floating. C1 V IN_LDO Input power to LDO. ( Must tie to V BATT at all times ) C2 EN_LDO Enable input for the linear regulator. The linear regulator is in shutdown mode if voltage at this pin is < 0.4V and enabled if > 1.1V. Do not leave this pin floating. C3 QGND Quiet GND pin for LDO and reference circuit. D1 V OUT_LDO Voltage output of the linear regulator. D2 V OUT_LILO Voltage output of the low input linear regulator D3 V IN_LILO Input power to LILO (V IN_LILO connects to output of DCDC or standalone). Order Information Part Number Voltage Options Package Marking Supplied as LM3686TL-AADW 1.81.22.8 ¢2¢X*$I¢CSUEB 250 units, tape and reel LM3686TLX-AADW 1.81.22.8 ¢2¢X*$I¢CSUEB 3000 units, tape and reel LM3686TLE-AAED 1.21.82.8 ¢2¢X*$I¢CSUEB 250 units, tape and reel LM3686TLX-AAED 1.21.82.8 ¢2¢X*$I¢CSUEB 3000 units, tape and reel LM3686TLE-AAEF 1.81.23.0 ¢2¢X*$I¢CSUEB 250 units, tape and reel LM3686TLX-AAEF 1.81.23.0 ¢2¢X*$I¢CSUEB 3000 units, tape and reel *Voltage options are read as follow: 1.81.22.8 = 1.8V for VOUT_DC-DC, 1.2V for VOUT_LILO, and 2.8V for VOUT_LDO; Contact National Semiconductor for other factory VOUT programmed options. www.national.com 4 |
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