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LTC3880-1 Datasheet(PDF) 7 Page - Linear Technology |
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LTC3880-1 Datasheet(HTML) 7 Page - Linear Technology |
7 / 54 page LTC3838 7 3838fa TYPICAL PERFORMANCE CHARACTERISTICS Phase Relationship: PHASMD = Ground Phase Relationship: PHASMD = Float Phase Relationship: PHASMD = INTVCC Overcurrent Protection Regular Soft Start-Up Short-Circuit Protection Soft Start-Up Into Pre-Biased Output Overvoltage Protection Output Tracking RUN1 5V/DIV VOUT 500mV/DIV 1ms/DIV 3838 G09 CSS = 10nF VIN = 12V VOUT = 1.2V FORCED CONTINUOUS MODE FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND TRACK/SS1 200mV/DIV RUN1 5V/DIV VOUT 500mV/DIV 1ms/DIV 3838 G10 CSS = 10nF VIN = 12V VOUT = 1.2V VOUT PRE-BIASED TO 0.75V FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND TRACK/SS1 200mV/DIV VOUT 500mV/DIV 10ms/DIV 3838 G11 VIN = 12V VOUT = 1.2V FORCED CONTINUOUS MODE FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND TRACK/SS1 200mV/DIV VOUT 100mV/DIV AC-COUPLED 5ms/DIV 3838 G12 VIN = 12V VOUT = 1.2V FORCED CONTINUOUS MODE CURRENT LIMIT = 17A OVERLOAD = 7.5A TO 17.5A FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND IL 5A/DIV FULL CURRENT LIMIT WHEN VOUT HIGHER THAN HALF OF REGULATED VOUT 1V/DIV SHORT- CIRCUIT TRIGGER 500μs/DIV 3838 G13 VIN = 12V VOUT = 1.2V ILOAD = 0A FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND IL 10A/DIV COUT RECHARGE CURRENT LIMIT STARTS TO FOLD BACK AS VOUT DROPS BELOW HALF OF REGULATED VOUT 100mV/DIV AC-COUPLED 20μs/DIV 3838 G14 VIN = 12V VOUT = 1.2V FORCED CONTINUOUS MODE ILOAD = 0A FIGURE 17 CIRCUIT, CHANNEL 1, VRNG1 = SGND BG STAYS ON UNTIL VOUT IS PULLED BELOW OVERVOLTAGE THRESHOLD IL 10A/DIV BG1 5V/DIV OVERVOLTAGE CREATED BY APPLYING A CHARGED CAPACITOR TO VOUT 500ns/DIV 60° 0° 3838 G15 FIGURE 19 CIRCUIT VIN = 12V VOUT1 = 5V, VOUT2 = 3.3V LOAD = 0A MODE/PLLIN = 333kHz EXTERNAL CLOCK CLKOUT 5V/DIV SW2 10V/DIV SW1 10V/DIV PLLIN 5V/DIV 180° 500ns/DIV 0° 3838 G15 FIGURE 19 CIRCUIT VIN = 12V VOUT1 = 5V, VOUT2 = 3.3V LOAD = 0A MODE/PLLIN = 333kHz EXTERNAL CLOCK CLKOUT 5V/DIV SW2 10V/DIV SW1 10V/DIV PLLIN 5V/DIV 90° 180° 500ns/DIV 0° 3838 G17 FIGURE 19 CIRCUIT VIN = 12V VOUT1 = 5V, VOUT2 = 3.3V LOAD = 0A MODE/PLLIN = 333kHz EXTERNAL CLOCK CLKOUT 5V/DIV SW2 10V/DIV SW1 10V/DIV PLLIN 5V/DIV 120° 240° |
Similar Part No. - LTC3880-1 |
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Similar Description - LTC3880-1 |
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