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LTC3822EDD-1 Datasheet(PDF) 5 Page - Linear Technology |
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LTC3822EDD-1 Datasheet(HTML) 5 Page - Linear Technology |
5 / 24 page LTC3822-1 5 38221f Maximum Current Sense Voltage vs ITH Pin Voltage Oscillator Frequency vs Input Voltage Shutdown Quiescent Current vs Input Voltage Quiescent Current in Normal Operation vs Input Voltage ITH VOLTAGE (V) 0.5 –20 0 20 40 60 100 1 1.5 38221 G03 2 80 Burst Mode OPERATION (ITH RISING) Burst Mode OPERATION (ITH FALLING) FORCED CONTINUOUS MODE PULSE SKIPPING MODE TYPICAL PERFORMANCE CHARACTERISTICS T A = 25°C unless otherwise noted. INPUT VOLTAGE (V) 2.5 –5 –4 –3 –2 –1 0 2 4.0 38221 G11 4 1 3 5 3.0 3.5 4.5 INPUT VOLTAGE (V) 2.5 0 2 4 6 8 12 4.5 38221 G12 16 10 14 18 3.5 3.0 4.0 INPUT VOLTAGE (V) 2.5 360 4.5 3822 G13 380 370 390 340 330 350 3.5 3.0 4.0 VRUN 1V/DIV VOUT 1V/DIV FIGURE 10 CIRCUIT VIN = 3.3V VOUT = 1.8V RLOAD = 1.5Ω 200 µs/DIV 38221 G14 VRUN 1V/DIV VOUT 1V/DIV VTRACK/SS 1V/DIV FIGURE 10 CIRCUIT VIN = 3.3V VOUT = 1.8V RLOAD = 1.5Ω CSS = 0.01µF 4ms/DIV 38221 G15 Start-Up with Internal Soft-Start Start-Up with External Soft-Start Capacitor Soft-Start with Tracking Continuous Mode Operation VOUT 1V/DIV VTRACK/SS 500mV/DIV FIGURE 10 CIRCUIT VIN = 3.3V VOUT = 1.8V RLOAD = 1.5Ω 4ms/DIV 38221 G16 VOUT 20mV/DIV AC COUPLED IL 2A/DIV VSW 2V/DIV FIGURE 10 CIRCUIT VIN = 3.3V VOUT = 1.8V, 100mA 2 µs/DIV 38221 G17 |
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