Datasheet LT3693 (Analog Devices) - 5

LT3693
W U TYPICAL PERFOR A CE CHARACTERISTICS TA = 25°C unless otherwise noted. Feedback Voltage Switching Frequency Frequency Foldback
840 1.20 1200 RT = 34.0k RT = 34.0k 1.15 1000 820 1.10 800 1.05 800 1.00 600 0.95 FREQUENCY (MHz) 400 FEEDBACK VOLTAGE (mV) 780 0.90 SWITCHING FREQUENCY (kHz) 200 0.85 760 0.80 0 –50 –25 0 25 50 75 100 125 150 –50 –25 0 25 50 75 100 125 150 0 100 200 300 400 500 600 700 800 900 TEMPERATURE (°C) TEMPERATURE (oC) FB PIN VOLTAGE (mV) 3693 G12 3693 G13 3693 G14
Minimum Switch On-Time Soft-Start RUN/SS Pin Current
140 7 12 120 6 10 μA) 100 5 8 80 4 6 60 3 4 40 2 SWITCH CURRENT LIMIT (A) RUN/SS PIN CURRENT ( MINIMUM SWITCH ON TIME (ns) 20 2 1 0 0 0 –50 –25 0 25 50 75 100 125 150 0 0.5 1 1.5 2 2.5 3 3.5 0 5 10 15 20 25 30 35 TEMPERATURE (°C) RUN/SS PIN VOLTAGE (V) RUN/SS PIN VOLTAGE (V) 3693 G15 3693 G16 3693 G17
Boost Diode Error Amp Output Current Minimum Input Voltage
1.4 50 5.0 40 1.2 4.5 30 1.0 (V) 20 F μA) 4.0 0.8 10 TAGE (V) 0 3.5 0.6 –10 PIN CURRENT ( 3.0 BOOST DIODE V 0.4 C INPUT VOL V –20 VOUT = 3.3V –30 2.5 T 0.2 A = 25oC –40 L = 4.7MH f = 600kHz 0 –50 2.0 0 0.5 1.0 1.5 2.0 –200 –100 0 100 200 1 10 100 1000 10000 BOOST DIODE CURRENT (A) FB PIN ERROR VOLTAGE (mV) LOAD CURRENT (mA) 3693 G18 3693 G19 3693 G20 3693f 5