Datasheet LTC3899 (Analog Devices) - 9

LTC3899
TYPICAL PERFORMANCE CHARACTERISTICS DRVCC and EXTVCC EXTVCC Switchover and DRVCC DRVCC Line Regulation vs Load Current Voltages vs Temperature
11 6.4 11 DRVSET = INTV 6.2 DRV CC EXTVCC = 0V CC 10 6 10 5.8 EXTVCC = 8.5V 9 DRVSET = INTV 9 5.6 CC 5.4 EXTV TAGE (V) TAGE (V) TAGE (V) 8 CC RISING 8 5.2 VOL VOL VOL 7 EXTVCC FALLING CC CC 5 CC EXTV DRV 7 DRV 4.8 CC = 5V DRV DRVCC 6 DRVSET = GND 4.6 6 4.4 DRVSET = GND 5 EXTVCC RISING 4.2 VBIAS = 12V DRVSET = GND EXTV 5 4 4 CC FALLING 0 5 10 15 20 25 30 35 40 45 50 55 60 65 0 25 50 75 100 125 150 -75 -50 -25 0 25 50 75 100 125 150 INPUT VOLTAGE (V) LOAD CURRENT (mA) TEMPERATURE (°C) 3899 G19 3899 G20 3899 G21
SENSE Pins Total Input Current Buck SENSE– Pin Input Bias Boost SENSE Pin Total Input vs VSENSE Voltage Current vs Temperature Current vs Temperature
800 900 200 VIN = 12V 700 800 180 SENSE1, 2 PINS (BUCK) VOUT > INTVCC + 0.5V 160 SENSE3+ PIN 600 700 140 600 500 120 500 400 100 400 300 80 300 SENSE CURRENT (µA) SENSE3 PINS (BOOST) 60 200 SENSE CURRENT (µA) SENSE CURRENT (µA) 200 40 100 100 20 VOUT < INTVCC – 0.5V SENSE3– PIN 0 0 0 0 5 10 15 20 25 30 35 40 45 50 55 60 65 -75 -50 -25 0 25 50 75 100 125 150 -75 -50 -25 0 25 50 75 100 125 150 VSENSE COMMON MODE VOLTAGE (V) TEMPERATURE (°C) TEMPERATURE (°C) 3899 G22 3899 G23 3899 G24
Maximum Current Sense Maximum Current Sense TRACK/SS Pull-Up Current Threshold vs Duty Cycle Threshold vs ITH Voltage vs Temperature
100 100 12 5% DUTY CYCLE 90 80 11.5 80 BOOST TAGE (µA) TAGE (mV) PULSE-SKIPPING 11 70 60 BUCK Burst Mode 60 10.5 40 OPERATION 50 10 40 20 9.5 30 0 TRACK/SS CURRENT (µA) 9 20 –20 FORCED CONTINUOUS MODE 10 8.5 MAXIMUM CURRENT SENSE VOL MAXIMUM CURRENT SENSE VOL 0 –40 8 0 10 20 30 40 50 60 70 80 90 100 0 0.2 0.4 0.6 0.8 1 1.2 1.4 -75 -50 -25 0 25 50 75 100 125 150 DUTY CYCLE (%) VITH (V) TEMPERATURE (°C) 3899 G25 3899 G26 3899 G27 3899fa For more information www.linear.com/LTC3899 9 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagrams Operation Typical Applications Package Description Typical Application Related Parts