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LM3686 Datasheet(PDF) 3 Page - Texas Instruments |
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LM3686 Datasheet(HTML) 3 Page - Texas Instruments |
3 / 28 page D3 D2 A3 A2 D1 C1 A1 B1 C2 B2 C3 B3 A3 A2 D3 D2 A1 B1 C1 D1 C2 B2 C3 B3 LM3686 www.ti.com SNVS520D – AUGUST 2008 – REVISED MARCH 2011 Connection Diagram Figure 3. 12-pin micro SMD package Pin Functions 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 VBATT 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 VIN_LDO Input power to LDO. ( Must tie to VBATT 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 VOUT_LDO Voltage output of the linear regulator. D2 VOUT_LILO Voltage output of the low input linear regulator D3 VIN_LILO Input power to LILO (VIN_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. Table 1. Enable Combinations EN_DCDC EN_LILO EN_LDO Function 0 0 0 No Outputs 0 0 1 Linear Regulator enabled only (EN_LDO), supply from VIN_LDO, IOUT_MAX = 300 mA 0 1 0 Linear Regulator enabled only LILO supplies from VIN_LDO, IOUT_MAX = 50 mA, VIN_LDO > = VOUT_LILO Copyright © 2008–2011, Texas Instruments Incorporated Submit Documentation Feedback 3 Product Folder Links: LM3686 |
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Descripción similar - LM3686_14 |
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