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LM3880MF-1AB датащи(PDF) 5 Page - National Semiconductor (TI) |
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LM3880MF-1AB датащи(HTML) 5 Page - National Semiconductor (TI) |
5 / 20 page 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 V IN_LDO, I OUT_MAX = 300 mA 0 1 0 Linear Regulator enabled only LILO supplies from V IN_LDO, I OUT_MAX = 50 mA, VIN_LDO > = VOUT_LILO 1 0 0 DC-DC converter enabled only 1 1 0 Linear Regulator & DCDC enabled 1) V IN_LILO < VOUT_LILO + 150 mV (typ.), the small NMOS device is active (I MAX = 50 mA) and supplied by VIN_LDO. 2) If V IN_LILO > VOUT_LILO + 250 mV (typ.), the large NMOS device is active (I MAX = 350 mA) and supplied by VIN_LILO. Maxium current of DC-DC when EN_LILO = High is 250 mA (Note A & B) 1 1 1 DC-DC converter and linear regulator active. Linear regulator starts after DC-DC converter. Note A: The LILO is turned on via a small NMOS device supplied by V IN_LDO . The maximum current is 50 mA when this small NMOS is ON. If higher current > 50 mA is desired the following condition must be done: EN_DC = HIGH . Note B: When the switcher is enabled, a transition occurs from the small NMOS to a larger NMOS. The transition occurs when V IN_LILO > VOUT_LILO + 250 mV. If VIN_LILO < VOUT_LILO + 150 mV, the LILO switches back to small NMOS (Switcher EN = low). 30025532 FIGURE 3. Mode Transition 5 www.national.com |
Аналогичный номер детали - LM3880MF-1AB |
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Аналогичное описание - LM3880MF-1AB |
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