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LM2664M6X Fiches technique(PDF) 8 Page - Texas Instruments |
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LM2664M6X Fiches technique(HTML) 8 Page - Texas Instruments |
8 / 9 page Other Applications (Continued) REGULATING V OUT It is possible to regulate the negative output of the LM2664 by use of a low dropout regulator (such as LP2980). The whole converter is depicted in Figure 6. This converter can give a regulated output from −1.8V to −5.5V by choosing the proper resistor ratio: V out =Vref (1+R1/R2) where, V ref = 1.23V Note that, the following conditions must be satisfied simulta- neously for worst case design: V in_min >Vout_min +Vdrop_max (LP2980) +I out_max xRout_max (LM2664) V in_max < Vout_max +Vdrop_min (LP2980) +I out_min xRout_min (LM2664) 10003112 FIGURE 5. Combined Voltage Doubler and Inverter 10003124 FIGURE 6. Combining LM2664 with LP2980 to Make a Negative Adjustable Regulator www.national.com 8 |
Numéro de pièce similaire - LM2664M6X |
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Description similaire - LM2664M6X |
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