Datasheet LTC7813 (Analog Devices) - 9

LTC7813
Typical perForMance characTerisTics Shutdown Current vs Shutdown Current vs Temperature Input Voltage Quiescent Current vs Temperature
8 14 80 VBIAS = 12V VBIAS = 12V 7 12 70 ONE CHANNEL ON Burst Mode OPERATION 6 60 10 DRVSET = 70kΩ 5 50 8 4 40 DRVSET = INTVCC 6 3 30 4 DRVSET = GND SHUTDOWN CURRENT (µA) 2 SHUTDOWN CURRENT (µA) 20 QUIESCENT CURRENT (µA) 1 2 10 0 0 0 -75 -50 -25 0 25 50 75 100 125 150 0 5 10 15 20 25 30 35 40 45 50 55 60 65 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) VBIAS INPUT VOLTAGE (V) TEMPERATURE (°C) 7813 G28 7813 G29 7813 G30
Oscillator Frequency vs Undervoltage Lockout Threshold Buck Foldback Current Limit Temperature vs Temperature
100 600 8 RISING 90 7.5 550 FREQ = INTVCC 80 7 DRVUV = INTVCC TAGE (mV) 70 6.5 500 FALLING 60 6 TAGE (V) 50 450 5.5 VOL 40 CC 5 FREQUENCY (kHz) 400 30 DRV 4.5 RISING DRVUV = GND FREQ = GND 20 4 ILIM = INTVCC 350 10 ILIM = FLOAT 3.5 FALLING MAXIMUM CURRENT SENSE VOL ILIM = GND 0 300 3 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 VFB1 FEEDBACK VOLTAGE (mV) TEMPERATURE (°C) TEMPERATURE (°C) 7813 G31 7813 G32 7813 G33
BOOST2 Charge Pump Output BOOST2 Charge Pump Charging BOOST2 Charge Pump Charging Voltage vs SW2 Voltage Current vs Frequency Current vs Switch Voltage
10 100 120 9 90 110 –55°C 100 8 80 –55°C 90 25°C 7 70 80 VBOOST2 – VSW2 = 4.5V TAGE (V) 25°C 6 60 70 150°C 5 50 60 4 40 50 150°C V 40 BOOST2 – VSW2 = 7.0V –55°C 3 150°C 30 30 BOOST2 – SW2 VOL 25°C 2 150°C –55°C 20 25°C 20 1 FREQ = 350kHz 10 VBOOST2 = 16.5V 10 10MΩ LOAD BETWEEN BOOST2 AND SW2 CHARGE PUMP CHARGING CURRENT (µA) V CHARGE PUMP CHARGING CURRENT (µA) SW2 = 12V FREQ = 350kHz 0 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 100 200 300 400 500 600 700 800 0 5 10 15 20 25 30 35 40 45 50 55 60 65 SW2 VOLTAGE (V) OPERATING FREQUENCY (kHz) SW2 VOLTAGE (V) 7813 G34 7813 G35 7813 G36 7813f For more information www.linear.com/LTC7813 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Applications Information Typical Applications Package Description Typical Application Related Parts