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REG71055DDCT Datasheet(PDF) 10 Page - Texas Instruments |
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REG71055DDCT Datasheet(HTML) 10 Page - Texas Instruments |
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10 / 26 page  EFFICIENCY LAYOUT Efficiency(%)=V /(2 V ) 100 (step-upoperatingmode) or (step-downoperatingmode) OUT IN ´ ´ V V OUT IN ´ 100 V ENABLE V IN C IN GND C P V OUT C OUT AREA:<0.08sq.inches REG710 SBAS221G – DECEMBER 2001 – REVISED JANUARY 2009........................................................................................................................................... www.ti.com The efficiency of the charge pump regulator varies Large transient currents flow in the VIN, VOUT, and with the output voltage version, the applied input GND traces. To minimize both input and output voltage, the load current, and the internal operation ripple, keep the capacitors as close as possible to the mode of the device. regulator using short, direct circuit traces. The approximate efficiency is given by: A suggested printed circuit board (PCB) routing is shown in Figure 21. The trace lengths from the input and output capacitors have been kept as short as possible. Table 2 lists the approximate values of the input voltage at which the device changes internal operating mode. See efficiency curves in the Typical Characteristics section for various loads and input voltages. Figure 21. Suggested PCB Design for Minimum Ripple Table 2. Operating Mode Change versus VIN OPERATING MODE PRODUCT CHANGES AT VIN OF REG710-2.5 > 3.2V REG710-2.7 > 3.4V REG710-3 > 3.7V REG710-3.3 > 4.0V REG710-5, REG71050, Step-up only REG71055 10 Submit Documentation Feedback Copyright © 2001–2009, Texas Instruments Incorporated Product Folder Link(s): REG710 |
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