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LTC3778EF Datasheet(PDF) 4 Page - Linear Technology |
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LTC3778EF Datasheet(HTML) 4 Page - Linear Technology |
4 / 24 page 4 LTC3778 3778f Efficiency vs Load Current Efficiency vs Input Voltage Frequency vs Input Voltage Load Regulation ITH Voltage vs Load Current Current Sense Threshold vs ITH Voltage Transient Response (Discontinuous Mode) Transient Response VOUT 50mV/DIV IL 5A/DIV 20 µs/DIV 3778 G01 LOAD STEP 0A TO 10A VIN = 15V VOUT = 2.5V FCB = 0V FIGURE 1 CIRCUIT 20 µs/DIV 3778 G02 LOAD STEP 1A TO 10A VIN = 15V VOUT = 2.5V FCB = INTVCC FIGURE 1 CIRCUIT Start-Up 50ms/DIV 3778 G19 VIN = 15V VOUT = 2.5V RLOAD = 0.125Ω TYPICAL PERFOR A CE CHARACTERISTICS VOUT 50mV/DIV IL 5A/DIV RUN/SS 2V/DIV IL 5A/DIV VOUT 1V/DIV LOAD CURRENT (A) 0.001 70 80 10 3778 G03 60 50 0.01 0.1 1 100 90 DISCONTINUOUS MODE CONTINUOUS MODE VIN = 10V VOUT = 2.5V EXTVCC = 5V FIGURE 1 CIRCUIT INPUT VOLTAGE (V) 0 80 85 90 95 100 510 15 20 3778 G04 25 30 ILOAD = 1A ILOAD = 10A FCB = 5V FIGURE 1 CIRCUIT INPUT VOLTAGE (V) 5 240 260 25 3778 G05 220 200 10 15 20 300 280 IOUT = 10A FCB = 0V FIGURE 1 CIRCUIT IOUT = 0A LOAD CURRENT (A) 0 –0.2 –0.1 8 3778 G06 –0.3 –0.4 2 4 6 10 0 FIGURE 1 CIRCUIT LOAD CURRENT (A) 0 1.0 1.5 3778 G07 0.5 0 5 10 15 2.5 2.0 CONTINUOUS MODE DISCONTINUOUS MODE FIGURE 1 CIRCUIT VRNG = 1V ITH VOLTAGE (V) 0 –200 –100 0 100 200 300 0.5 1.0 1.5 2.0 3778 G08 2.5 3.0 VRNG = 1V 0.7V 0.5V 1.4V 2V |
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