Datasheet LTC3807 (Analog Devices) - 7

LTC3807
TYPICAL PERFORMANCE CHARACTERISTICS Maximum Current Sense Voltage Maximum Current Sense vs ITH Voltage SENSE– Pin Input Bias Current Threshold vs Duty Cycle
80 800 80 5% DUTY CYCLE 700 60 70 ILIM = FLOAT PULSE-SKIPPING MODE 600 TAGE (mV) 40 Burst Mode 500 60 OPERATION 400 I 20 50 LIM = INTVCC 300 I – CURRENT (µA) LIM = GND 0 200 40 ILIM = INTVCC SENSE I I 100 LIM = GND CURRENT SENSE THESHOLD (mV) –20 LIM = FLOAT 30 FORCED CONTINUOUS MODE 0 MAXIMUM CURRENT SENSE VOL –40 –100 20 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 0 5 10 15 20 25 0 10 20 30 40 50 60 70 80 90 100 VITH (V) VSENSE COMMON MODE VOLTAGE (V) DUTY CYCLE (%) 3807 G13 3807 G14 3807 G15
Foldback Current Limit Quiescent Current vs Temperature INTVCC vs INTVCC Load Current
80 80 5.50 ILIM = FLOAT VIN = 12V VIN = 12V 70 75 Burst Mode OPERATION 5.25 TAGE (mV) 70 60 EXTVCC = 0V ILIM = INTVCC 65 50 5.00 EXTVCC = 8.5V 60 40 55 4.75 VOLTAGE (V) 30 50 CC I 4.50 EXTV LIM = GND 45 INTV CC = 5V 20 QUIESCENT CURRENT (µA) 40 10 4.25 35 MAXIMUM CURRENT SENSE VOL 0 30 4.00 0 100 200 300 400 500 600 700 800 –75 –50 –25 0 25 50 75 100 125 150 0 20 40 60 80 100 FEEDBACK VOLTAGE (MV) TEMPERATURE (°C) INTVCC LOAD CURRENT (mA) 3807 G16 3807 G17 3807 G18
TRACK/SS Pull-Up Current Shutdown (RUN) Threshold Regulated Feedback Voltage vs Temperature vs Temperature vs Temperature
12.0 1.30 808 11.5 806 11.0 1.25 804 10.5 RUN RISING 802 10.0 1.20 800 9.5 798 RUN FALLING TRACK/SS CURRENT (µA) 9.0 RUN PIN VOLTAGE (V) 1.15 796 8.5 REGULATED FEEDBACK VOLTAGE (mV) 794 8.0 1.10 792 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 –75 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3807 G19 3807 G20 3807 G21 3807fa For more information www.linear.com/LTC3807 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Typical Application Related Parts Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Related Parts