Datasheet LTC7813 (Analog Devices) - 8

LTC7813
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 DRVCC CC EXTVCC = 0V 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 DRV 7 DRV 4.8 CC = 5V DRV CC 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) 7813 G19 7813 G20 7813 G21
SENSE Pins Input Current Buck SENSE1– Pin Input Bias Boost SENSE2 Pins Input Current vs VSENSE Voltage Current vs Temperature vs Temperature
800 900 200 VIN = 12V 700 800 180 SENSE1– PIN (BUCK) VOUT1 > INTVCC + 0.5V 160 SENSE2+ PIN 600 700 140 600 500 120 500 400 100 – CURRENT (µA) 400 300 80 300 SENSE CURRENT (µA) SENSE2+ PIN (BOOST) SENSE CURRENT (µA) 60 200 SENSE1 200 40 100 100 20 VOUT1 < INTVCC – 0.5V SENSE2– 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) 7813 G23 7813 G24 7813 G22
Maximum Current Sense Maximum Current Sense TRACK/SS1 and SS2 Pull-Up Threshold vs Duty Cycle Threshold vs ITH Voltage Current vs Temperature
100 100 12 5% DUTY CYCLE 90 11.5 80 80 BOOST TAGE (µA) PULSE-SKIPPING 11 70 60 Burst Mode BUCK TAGE (mV) 60 OPERATION 10.5 40 50 10 40 20 9.5 30 I 0 LIM = GND ILIM = FLOAT 9 20 I CURRENT SENSE VOL LIM = INTVCC –20 TRACK/SS AND SS2 CURRENT (µA) 10 8.5 FORCED CONTINUOUS MODE 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) 7813 G25 7813 G26 7813 G27 7813f 8 For more information www.linear.com/LTC7813 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