Datasheet LTC3600 (Analog Devices) - 7

LTC3600
Typical perForMance characTerisTics Rising RUN Threshold vs Efficiency vs Load Current Efficiency vs Load Current Temperature V V OUT = 3.3V, VIN = 12V OUT = 1.2V, VIN = 12V
1.60 100 100 90 90 80 80 1.55 70 70 DCM DCM 60 60 1.50 50 50 CCM CCM 40 40 EFFICIENCY (%) EFFICIENCY (%) RUN THRESHOLD (V) 30 30 1.45 20 20 10 10 1.40 0 0 –60 –40 –20 0 20 40 60 80 100 120 140 0.001 0.01 0.1 1 10 0.001 0.01 0.1 1 10 TEMPERATURE (°C) LOAD CURRENT (A) LOAD CURRENT (A) 3600 G19 3600 G20 3600 G18
Start-Up Waveform Start-Up Waveform Start-Up Waveform
RUN RUN RUN 5V/DIV 5V/DIV 5V/DIV VOUT VOUT VOUT 2V/DIV 2V/DIV 2V/DIV I I I L L L 1A/DIV 1A/DIV 1ms/DIV 3600 G21 1ms/DIV 3600 G22 1ms/DIV 3600 G23 MODE = CCM MODE = DCM MODE = CCM NO PREBIASED VOUT NO PREBIASED VOUT VOUT IS PREBIASED TO 2V VIN = 12V VIN = 12V VIN = 12V VOUT = 3.3V VOUT = 3.3V VOUT = 3.3V
Start-Up Waveform VIN Overvoltage
VIN RUN 5V/DIV 5V/DIV V VOUT OUT 2V/DIV 1V/DIV IL 1A/DIV SW 10V/DIV 1ms/DIV 3600 G24 20ms/DIV 3600 G25 MODE = DCM VIN = 12V TO 18V TO 12V VOUT IS PREBIASED TO 2V VOUT = 3.3V VIN = 12V IOUT = 1A VOUT = 3.3V VIN RESISTOR = 30Ω MODE = CCM 3600fd 7 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts