Datasheet LTC3773 (Analog Devices) - 7

LTC3773
TYPICAL PERFORMANCE CHARACTERISTICS Error Amplifi er gm VFB vs Temperature vs Temperature
606.0 1.00 3.2 604.5 0.75 3.1 3.0 603.0 0.50 2.9 601.5 0.25 ΔVFB 2.8 (mV) (%) 600.0 0 V FB 2.7 598.5 –0.25 2.6 597.0 –0.50 2.5 ERROR AMPLIFIER gm (mmho) 595.5 –0.75 2.4 594.0 –1.00 2.3 –50 –25 0 25 50 75 100 125 –50 –25 0 25 50 75 100 125 TEMPERATURE (°C) TEMPERATURE (°C) 3773 G12 3773 G13
Maximum Current Limit Maximum Current Limit Threshold vs Temperature Threshold vs VITH
84 12 80 VFB = 0.58V VSENSE – = 5V 81 8 60 VSENSE – = 2.5V 78 4 Δ 40 VSENSE (mV) (mV) 75 0 (%) 20 V SENSE V SENSE 72 –4 0 VSENSE – = 0.6V 69 –8 –20 66 –12 –40 –50 –25 0 25 50 75 100 125 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 2.4 2.7 TEMPERATURE (°C) VITH (V) 3773 G14 3773 G15
Maximum Current Limit Threshold vs SENSE Common Maximum Current Limit Mode Voltage Threshold vs Duty Factor
90 80 VCC = 5V 87 VFB = 0.58V 70 84 60 81 78 50 (mV) (mV) 75 40 V SENSE 72 V SENSE 30 69 20 66 63 10 60 0 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 0 10 20 30 40 50 60 70 80 90 100 VSENSE COMMON MODE VOLTAGE (V) DUTY FACTOR (%) 3773 G16 3773 G17 3773fb 7