Datasheet LTC3631 (Analog Devices) - 5

LTC3631
Typical perForMance characTerisTics Peak Current Trip Threshold Peak Current Trip Threshold Quiescent Supply Current vs RISET vs Input Voltage vs Input Voltage
240 250 V 14 220 IN = 10V I 225 SET OPEN 200 12 200 SLEEP 180 175 10 160 150 140 8 125 RSET = 500k 120 Y CURRENT (µA) 6 100 100 SHUTDOWN 80 75 SUPPL I 4 SET = GND V IN 60 50 2 PEAK CURRENT TRIP THRESHOLD (mA) 40 PEAK CURRENT TRIP THRESHOLD (mA) 25 20 0 0 0 200 400 600 800 1000 1200 0 5 10 15 20 25 30 35 40 45 50 5 15 25 35 45 RISET (kΩ) INPUT VOLTAGE (V) INPUT VOLTAGE (V) 3631 G10 3631 G11 3631 G12
Quiescent Supply Current Switch On-Resistance Switch On-Resistance vs Temperature vs Input Voltage vs Temperature
14 4.5 5 VIN = 10V VIN = 10V 12 4.0 SLEEP 4 3.5 TOP 10 TOP 3.0 ANCE (Ω) 3 8 2.5 Y CURRENT (µA) 6 2.0 BOTTOM BOTTOM 2 SUPPL 4 1.5 SHUTDOWN V IN 1.0 SWITCH 0N-RESISTANCE (Ω) 1 2 SWITCH ON-RESIST 0.5 0 0 –40 –10 20 50 80 110 0 0 10 20 30 40 50 –40 –10 20 50 80 110 TEMPERATURE (°C) INPUT VOLTAGE (V) TEMPERATURE (°C) 3631 G13 3631 G15 3631 G14
Switch Leakage Current RUN Comparator Threshold vs Temperature Voltages vs Temperature Operating Waveforms
0.6 1.300 VIN = 45V SWITCH 0.5 1.250 VOLTAGE RISING 20V/DIV 0.4 1.200 OUTPUT VOLTAGE 0.3 1.150 50mV/DIV FALLING 0.2 1.100 INDUCTOR SW = 0V CURRENT 100mA/DIV SWITCH LEAKAGE CURRENT (µA) 0.1 1.050 SW = 45V RUN COMPARATOR THRESHOLD (V) 0 1.000 –40 –10 20 50 80 110 –40 –10 20 50 80 110 V 3631 G18 IN = 36V 20µs/DIV TEMPERATURE (°C) TEMPERATURE (°C) VOUT = 5V ILOAD = 35mA 3631 G16 3631 G17 3631fe For more information www.linear.com/LTC3631 5 Document Outline Features Description Applications Typical Application Absolute Maximum Ratings Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Application Related Parts