Datasheet LT3752, LT3752-1 (Analog Devices) - 10

LT3752/LT3752-1
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. HISENSE Overcurrent HISENSE Peak Current Threshold (Hiccup Mode) Threshold vs Junction Temperature HISENSE Pin Current vs Duty Cycle vs Junction Temperature
85 60 110 84 50 105 83 82 40 100 81 80 30 95 79 PIN CURRENT (µA) 20 90 78 SENSE PEAK CURRENT THRESHOLD (mV) HI OVERCURRENT THRESHOLD (mV) 77 10 TJ = 150°C 85 T SENSE 76 J = 25°C SENSE HI TJ = –55°C HI 75 0 80 –75 –50 –25 0 25 50 75 100 125 150 175 0 10 20 30 40 50 60 70 80 90 100 –75 –50 –25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) DUTY CYCLE (%) JUNCTION TEMPERATURE (°C) 3752 G09 3752 G10 3752 G11
Housekeeping Internal Soft-Start LT3752: INTVCC in Dropout at Time (HSS) vs Junction VIN = 6.5V vs Current, Junction LT3752: INTVCC UVLO Thresholds Temperature Temperature vs Junction Temperature
3.00 7.0 4.85 6.5 2.75 4.80 T TIME (ms) INTVCC > UVLO (+): ENABLE SWITCHING AR 6.0 4.75 T-ST 2.50 5.5 (V) 4.70 2.25 V CC 5.0 INT 4.65 4.5 2.00 UVLO THRESHOLD (V) INTVCC < UVLO (–): DISABLE SWITCHING 4.60 4.0 I V CC LOAD = 0mA INT 1.75 ILOAD = 10mA 3.5 I 4.55 LOAD = 15mA ILOAD = 20mA 1.50 3.0 HOUSEKEEPING INTERNAL SOF 4.50 –75 –50 –25 0 25 50 75 100 125 150 175 –75 –50 –25 0 25 50 75 100 125 150 175 –75 –50 –25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 3752 G12 3752 G13 3752 G14
LT3752: INTVCC Regulation LT3752-1: INTVCC in Dropout at Voltage vs Current, Junction VIN = 8.75V vs Current, Junction Temperature Temperature
7.00 10.0 VIN = 12V VIN = 12V 6.95 9.5 9.0 6.90 8.5 6.85 8.0 (V) (V) V CC 6.80 V CC 7.5 INT 6.75 INT 7.0 6.5 6.70 ILOAD = 0mA ILOAD = 0mA I 6.0 LOAD = 10mA I 6.65 LOAD = 10mA ILOAD = 20mA 5.5 ILOAD = 15mA ILOAD = 30mA ILOAD = 20mA 6.60 5.0 –75 –50 –25 0 25 50 75 100 125 150 175 –75 –50 –25 0 25 50 75 100 125 150 175 JUNCTION TEMPERATURE (°C) JUNCTION TEMPERATURE (°C) 3752 G15 3752 G16 Rev. C 10 For more information www.analog.com Document Outline Features Applications Typical Application Description Table of Contents Absolute Maximum Ratings Order Information Pin Configuration Order Information Electrical Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts