Datasheet LTC3859AL (Analog Devices) - 10

LTC3859AL
TYPICAL PERFORMANCE CHARACTERISTICS Shutdown Current Shutdown Current vs Temperature vs Input Voltage Quiescent Current vs Temperature
20 25 80 VBIAS = 12V 18 70 20 16 60 14 15 50 ALL CHANNELS ON 12 40 10 10 30 CHANNEL 1 ON SHUTDOWN CURRENT (µA) 8 SHUTDOWN CURRENT (µA) 20 5 QUIESCENT CURRENT (µA) 6 10 4 0 0 –75 –50 –25 0 25 50 75 100 125 150 5 10 15 20 25 30 35 40 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VBIAS INPUT VOLTAGE (V) TEMPERATURE (°C) 3859al G28 3859al G29 3859al G30
Oscillator Frequency Undervoltage Lockout Threshold Buck Foldback Current Limit vs Temperature vs Temperature
70 600 4.4 65 4.3 60 550 FREQ = INTVCC 4.2 RISING TAGE (mV) 55 50 4.1 45 500 40 4.0 TAGE (V) 35 450 3.9 30 VOL FALLING 3.8 25 V CC FREQUENCY (kHz) 400 20 INT 3.7 15 FREQ = GND 3.6 10 350 3.5 MAXIMUM CURRENT SENSE VOL 5 0 300 3.4 0 100 200 300 400 500 600 700 800 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 FEEDBACK VOLTAGE (mV) TEMPERATURE (°C) TEMPERATURE (°C) 3859al G31 3859al G32 3859al G33
Shutdown (RUN) Threshold Charge Pump Charging Current Charge Pump Charging Current vs Temperature vs Operating Frequency vs Switch Voltage
1.40 100 100 VBOOST3 = 16V VBOOST3 – VSW3 = 4V 1.35 90 VSW3 = 12V 90 80 –55°C 80 FREQ = 0V 1.30 RUN2,3 RISING 70 25°C 70 1.25 RUN1 RISING FREQ = INTVCC TAGE (V) 60 60 1.20 50 50 RUN2,3 FALLING 1.15 40 150°C 40 RUN PIN VOL RUN1 FALLING 30 30 1.10 20 20 1.05 10 10 CHARGE PUMP CHARGING CURRENT (µA) CHARGE PUMP CHARGING CURRENT (µA) 1.00 0 0 –75 –50 –25 0 25 50 75 100 125 150 100 200 300 400 500 600 700 800 5 10 15 20 25 30 35 40 TEMPERATURE (°C) OPERATING FREQUENCY (kHz) SWITCH VOLTAGE (V) 3859al G34 3859al G35 3859al G36 Rev. B 10 For more information www.analog.com 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