Datasheet LTC3789 (Analog Devices) - 6

LTC3789
Typical perForMance characTerisTics TA = 25°C unless otherwise noted. Forced Continuous Mode Forced Continuous Mode Forced Continuous Mode
SW1 SW1 SW1 10V/DIV 10V/DIV 10V/DIV SW2 SW2 SW2 10V/DIV 10V/DIV 10V/DIV IL 1A/DIV IL IL 1A/DIV 1A/DIV 3789 G10 3789 G12 4µs/DIV 3789 G11 4µs/DIV 4µs/DIV VIN = 6V VIN = 12V VIN = 18V VOUT = 12V VOUT = 12V VOUT = 12V
Pulse-Skipping Mode Pulse-Skipping Mode Pulse-Skipping Mode
SW1 SW1 SW1 10V/DIV 10V/DIV 10V/DIV SW2 SW2 SW2 10V/DIV 10V/DIV 10V/DIV IL IL IL 1A/DIV 1A/DIV 1A/DIV 3789 G13 4µs/DIV 3789 G14 2µs/DIV 3789 G15 2µs/DIV VIN = 6V VIN = 12V V V IN = 18V OUT = 12V VOUT = 12V VOUT = 12V
Oscillator Frequency Undervoltage Threshold at INTVCC Undervoltage Threshold at VIN vs Temperature vs Temperature vs Temperature
700 5.0 5.0 VFREQ = 2.4V 4.5 4.5 600 RISING 4.0 RISING 4.0 FALLING 500 3.5 FALLING 3.5 VFREQ = 1.2V 3.0 3.0 400 2.5 2.5 300 2.0 2.0 V 200 FREQ = 0V UNDERVOLTAGE (V) 1.5 UNDERVOLTAGE (V) 1.5 OSCILLATOR FREQUENCY (kHz) 1.0 1.0 100 0.5 0.5 0 0 0 –50 0 50 100 150 –60 –40 –20 0 20 40 60 80 100 –60 –40 –20 0 20 40 60 80 100 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3789 G17 3789 G18 3789 G16 3789fc 6 For more information www.linear.com/LTC3789 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration order information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Typical Application Related Parts