Datasheet LTC7103 (Analog Devices) - 6

LTC7103
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Regulated Feedback Voltage vs Average Output Current vs VIN, Average Output Current vs Temperature ICTRL Temperature
1.005 3.0 3.0 V FIGURE 14 CIRCUIT PRG1 = FLOAT FIGURE 14 CIRCUIT 1.004 VPRG2 = FLOAT ICTRL = 1.3V VICTRL = 1.3V 2.5 2.5 1.003 TAGE (V) 1.002 2.0 2.0 1.001 ICTRL = 0.94V 1.000 1.5 1.5 0.999 VICTRL = 0.76V 1.0 TED FEEDBACK VOL 1.0 0.998 0.997 ICTRL = 0.58V AVERAGE OUTPUT CURRENT (A) 0.5 AVERAGE OUTPUT CURRENT (A) 0.5 REGULA 0.996 0.995 0 0 –55 –25 5 35 65 95 125 155 0 20 40 60 80 100 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) VIN VOLTAGE (V) TEMPERATURE (°C) 7103 G10 7103 G11 7103 G12
Peak Current Limit vs Output Current Monitor vs Output Current Monitor Error vs Temperature Average Output Current Average Output Current
3.80 1.3 3 FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT 1.2 VIN = 72V 3.75 VIN = 24V V 1.1 IN = 48V VIN = 48V VIN = 24V 3.70 VIN = 72V 1.0 2 0.9 3.65 TAGE (V) 0.8 VOL TAGE ERROR (%) 3.60 I MON 0.7 VOL 1 PEAK CURRENT LIMIT (A) 0.6 I MON 3.55 0.5 3.50 0.4 0 –55 –25 5 35 65 95 125 155 0 0.5 1 1.5 2 2.5 0 0.5 1 1.5 2 2.5 TEMPERATURE (°C) AVERAGE OUTPUT CURRENT (A) AVERAGE OUTPUT CURRENT (A) 7103 G13 7103 G14 7103 G15
Top and Bottom Switch Minimum On-Time vs Oscillator Frequency vs Resistance vs Temperature Temperature Temperature
550 55 3 FREQ = GND (300kHz) 500 FREQ = 12.5k (200kHz) 450 2 50 FREQ = 57.5k (2MHz) FREQ = INTVCC (1MHz) 400 TOP SWITCH 1 350 45 300 ANCE (mΩ) 0 250 40 RESIST 200 –1 MINIMUM ON-TIME (ns) 150 35 CHANGE IN FREQUENCY (%) BOTTOM SWITCH –2 100 50 30 –3 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 7103 G16 7103 G17 7103 G18 Rev. B 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Package Description Revision History Typical Application Related Parts