Datasheet LTC3839 (Analog Devices) - 6

LTC3839
TYPICAL PERFORMANCE CHARACTERISTICS Soft Start-Up Into Regular Soft Start-Up Pre-Biased Output Output Tracking
RUN RUN 5V/DIV 5V/DIV TRACK/SS 200mV/DIV TRACK/SS 200mV/DIV VOUT 500mV/DIV V TRACK/SS OUT V 500mV/DIV OUT 200mV/DIV 500mV/DIV 1ms/DIV 3839 G09 CSS = 10nF 1ms/DIV 3839 G10 CSS = 10nF 10ms/DIV 3839 G11 VIN = 12V VIN = 12V VIN = 12V VOUT = 1.2V VOUT = 1.2V VOUT = 1.2V FORCED CONTINUOUS MODE FORCED CONTINUOUS MODE VOUT PRE-BIASED TO 0.75V
Overcurrent Protection Short-Circuit Protection Overvoltage Protection
SHORT- CIRCUIT IL I TRIGGER L 10A/DIV 5A/DIV OVERVOLTAGE CREATED BY APPLYING V FULL CURRENT LIMIT OUT V A CHARGED CAPACITOR TO VOUT 1V/DIV OUT WHEN V 100mV/DIV OUT HIGHER CURRENT LIMIT STARTS TO FOLD BACK AS THAN HALF OF REGULATED V AC-COUPLED OUT DROPS BELOW HALF OF REGULATED IL C V OUT OUT 10A/DIV RECHARGE BG1 100mV/DIV 5V/DIV AC-COUPLED 5ms/DIV 3839 G12 V IN = 12V 20µs/DIV 3839 G14 V IN = 12V 500µs/DIV 3839 G13 VIN = 12V V V BG STAYS ON UNTIL OUT = 1.2V VOUT = 1.2V OUT = 1.2V FORCED CONTINUOUS MODE I FORCED CONTINUOUS V LOAD = 0A OUT IS PULLED MODE BELOW OVERVOLTAGE ILOAD = 0A THRESHOLD
Phase Relationship: Phase Relationship: Phase Relationship: PHASMD = Ground PHASMD = Float PHASMD = INTVCC
PLLIN PLLIN PLLIN 5V/DIV 5V/DIV 5V/DIV SW1 SW1 SW1 0° 10V/DIV 0° 10V/DIV 0° 10V/DIV SW2 SW2 SW2 240° 10V/DIV 180° 10V/DIV 180° 10V/DIV CLKOUT CLKOUT CLKOUT 60° 5V/DIV 5V/DIV 90° 5V/DIV 120° 500ns/DIV 3839 G15 500ns/DIV 3839 G16 500ns/DIV 3839 G17 FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT FIGURE 13 CIRCUIT VIN = 12V VIN = 12V VIN = 12V LOAD = 0A LOAD = 0A LOAD = 0A MODE/PLLIN = 333kHz EXTERNAL CLOCK MODE/PLLIN = 333kHz EXTERNAL CLOCK MODE/PLLIN = 333kHz EXTERNAL CLOCK 3839fa 6 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Functional Diagram Operation Typical Applications Typical Application Related Parts