Datasheet LTC3613 (Analog Devices) - 6

LTC3613
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted Overcurrent Protection Short-Circuit Protection Overvoltage Protection
SHORT- LOAD-STEP V V CIRCUIT OUT 7.5A OUT DROOPS TRIGGER SHORT-CIRCUIT DUE TO 200mV/DIV TRIGGER REGION REACHING CURRENT LIMIT VOUT OVERVOLTAGE OVERVOLTAGE REGION 1V/DIV VOUT TRIGGER 1V/DIV IL NOTE 10A/DIV ILOAD I 10A/DIV SW LOAD 10A/DIV 20V/DIV 4ms/DIV 3613 G10 VIN = 12V 200μs/DIV 3613 G11 VIN = 12V 20μs/DIV 3613 G12 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT FIGURE 10 CIRCUIT NOTE: INDUCTOR CURRENT REACHES NOTE: SW IS FORCED LOW CURRENT LIMIT BEFORE FOLDBACK FOR EXTENDED PERIODS TO AND DURING SHORT-CIRCUIT RECOVERY REMOVE OVERVOLTAGE
Output Regulation Output Regulation Output Regulation vs Input Voltage vs Load Current vs Temperature
0.5 0.5 0.2 VIN = 12V V V IN = 12V IN = 12V ILOAD = 5A I I LOAD = 4A LOAD = 0A FIGURE 10 CIRCUIT V 0.3 0.3 FIGURE 10 CIRCUIT OUT NORMALIZED AT TA = 25°C 0.1 FIGURE 10 CIRCUIT (%) 0.1 0.1 OUT 0 ERROR (%) ERROR (%) –0.1 –0.1 OUT OUT ΔV ΔV NORMALIZED ΔV –0.1 –0.3 –0.3 –0.5 –0.5 –0.2 0 4 8 12 16 20 24 0 3 6 9 12 15 –50 –25 0 25 50 55 100 125 150 INPUT VOLTAGE (V) LOAD CURRENT (A) TEMPERATURE (°C) 3613 G13 3613 G14 3613 G15
Switching Frequency Switching Frequency Non-Synchronized Switching vs Input Voltage vs Load Current Frequency vs Temperature
2.0 0.5 1.0 VIN = 12V VIN = 12V ILOAD = 4A ILOAD = 0A 1.5 0.5 0.3 FIGURE 10 CIRCUIT FREQUENCY NORMALIZED AT TA = 25°C FIGURE 10 CIRCUIT (%) 1.0 (%) 0 Δf Δf 0.1 Δf (%) 0.5 –0.5 –0.1 0 –1.0 NORMALIZED NORMALIZED NORMALIZED V –0.3 –0.5 IN = 12V –1.5 ILOAD = 5A FIGURE 10 CIRCUIT –1.0 –0.5 –2.0 0 4 8 12 16 20 24 0 3 6 9 12 15 –50 –25 0 25 50 75 100 125 150 VIN (V) LOAD CURRENT (A) TEMPERATURE (°C) 3613 G16 3613 G17 3613 G18 3613fa 6