Datasheet LTC7815 (Analog Devices) - 10

LTC7815
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) 7815 G28 7815 G29 7815 G30
Oscillator Frequency Undervoltage Lockout Threshold Buck Foldback Current Limit vs Temperature vs Temperature
70 2.25 4.4 65 FREQ = 100k 4.3 60 2.05 4.2 RISING TAGE (mV) 55 50 1.85 4.1 45 40 4.0 1.65 TAGE (V) 35 3.9 FREQ = INTVCC 30 VOL FALLING 1.45 3.8 25 V CC 20 FREQUENCY (MHz) 1.25 INT 3.7 15 3.6 10 1.05 FREQ = GND 3.5 MAXIMUM CURRENT SENSE VOL 5 0 0.85 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) 7815 G31 7815 G33 7815 G32
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 90 V 1.35 SW3 = 12V 90 –55°C 80 80 1.30 RUN2,3 RISING 25°C 70 70 1.25 RUN1 RISING 60 60 TAGE (V) 1.20 50 50 RUN2,3 FALLING 150°C 1.15 40 40 RUN PIN VOL RUN1 FALLING 30 30 1.10 20 20 FREQ = 0V 1.05 10 10 FREQ = INTVCC CHARGE PUMP CHARGING CURRENT (µA) CHARGE PUMP CHARGING CURRENT (µA) FREQ = 100k 1.00 0 0 –75 –50 –25 0 25 50 75 100 125 150 0 500 1000 1500 2000 2500 3000 5 10 15 20 25 30 35 40 TEMPERATURE (°C) OPERATING FREQUENCY (kHz) SWITCH VOLTAGE (V) 7815 G34 7815 G35 7815 G36 7815f 10 For more information www.linear.com/LTC7815 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION ELECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS FUNCTIONAL DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATION RELATED PARTS