Datasheet LT3689, LT3689-5 (Analog Devices) - 7

LT3689/LT3689-5
TYPICAL PERFORMANCE CHARACTERISTICS EN/UVLO Pin Current EN/UVLO Pin Threshold Boost Diode Forward Voltage
7 1.300 900 VIN = 12V 1.290 6 800 TA = –50°C TA = –50°C 1.280 700 5 TA = 25°C 1.270 TA = 25°C 600 TAGE (mV) 4 1.260 TA = 150°C T EN/UVLO THRESHOLD RISING 500 A = 150°C 1.250 3 400 1.240 300 2 1.230 EN/UVLO THRESHOLD FALLING EN/UVLO PIN CURRENT (µA) EN/UVLO THRESHOLD (V) 1.220 BOOST DIODE VOL 200 1 1.210 100 0 1.200 0 0 5 10 15 20 25 30 35 –50 –25 0 25 50 75 100 125 150 0 10 20 30 40 50 VEN/UVLO (V) TEMPERATURE (°C) BOOST DIODE CURRENT (mA) 3689 G22 3689 G24 3689 G23
Switching Waveform: Switching Waveform: Transition from Burst Mode EN/UVLO Hysteresis Current Burst Mode Operation to Full Frequency
5.0 VOUT VOUT 10mV/DIV 10mV/DIV 4.5 IL IL 0.2A/DIV 0.2A/DIV 4.0 V V SW SW 5V/DIV 5V/DIV 3.5 3689 G26 3689 G27 EN/UVLO HYSTERESIS CURRENT (µA) 5µs/DIV 1µs/DIV VIN = 12V, FRONT PAGE APPLICATION VIN = 12V, FRONT PAGE APPLICATION 3.0 ILOAD = 6mA ILOAD = 60mA –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3689 G25
Switching Waveform: Power-On-Reset Threshold Full Frequency Continuous Operation vs Temperature
0.730 VOUT 10mV/DIV 0.725 IL 0.5A/DIV 0.720 VSW 10V/DIV POR THRESHOLD (V) 0.715 3689 G28 1µs/DIV VIN = 12V, FRONT PAGE APPLICATION ILOAD = 600mA 0.710–50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) 3689 G29 3689fe For more information www.linear.com/LT3689 7 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Timing Diagrams Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts