Datasheet LT3581 (Analog Devices) - 6

LT3581
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Commanded Current Limit vs SHDN Voltage Threshold with Gate Current vs SS Voltage SS Voltage Hysteresis
1000 5 1.40 900 1.38 800 4 1.36 SHDN RISING 700 1.34 600 3 1.32 500 1.30 VOLTAGE (V) SHDN FALLING 400 2 1.28 TE CURRENT (µA) GA 300 SHDN 1.26 SW1 + SW2 CURRENT (A) 200 1 1.24 100 1.22 0 0 1.20 0 0.25 0.50 0.75 1.00 1.25 1.50 0 0.2 0.4 0.6 0.8 1.0 1.2 –50 –25 0 25 50 75 100 125 150 SS VOLTAGE (V) SS VOLTAGE (V) TEMPERATURE (°C) 3581 G10 3580 G11 3581 G12
SHDN Pin Current SHDN Pin Current Internal UVLO
32 250 2.40 –40°C 28 2.38 25°C 200 2.36 24 25°C 2.34 20 150 2.32 16 125°C 2.30 PIN CURRENT (µA) 12 PIN CURRENT (µA) 100 VOLTAGE (V) 2.28 V IN 2.26 SHDN 8 SHDN 125°C 50 2.24 4 –40°C 2.22 0 0 2.20 0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2.0 0 5 10 15 20 25 30 35 40 –50 –25 0 25 50 75 100 125 150 SHDN VOLTAGE (V) SHDN VOLTAGE (V) TEMPERATURE (°C) 3581 G14 3581 G15 3581 G13
FAULT Input Voltage Threshold CLKOUT Rise Time at 1MHz VIN OVLO with Hysteresis
50 30 1.25 45 28 FAULT RISING 40 1.00 CLKOUT RISE TIME 26 35 30 24 0.75 FAULT FALLING 25 VOLTAGE (V) 20 VOLTAGE (V) 22 0.50 V IN 15 20 FAULT CLKOUT FALL TIME 10 0.25 CLKOUT RISE OR FALL TIME (ns) 18 5 0 16 0 0 50 100 150 200 250 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 CLKOUT CAPACITIVE LOAD (pF) TEMPERATURE (°C) TEMPERATURE (°C) 3581 G16 3581 G17 3581 G18 3581fb 6 For more information www.linear.com/LT3581 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram State Diagram Operation Applications Information Appendix Typical Applications Typical Application Related Parts