Datasheet LT7101 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 105V, 1A Low EMI Synchronous Step-Down Regulator with Fast Current Programming |
| 页数 / 页 | 38 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 文件格式/大小 | PDF / 3.2 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Efficiency vs Input Voltage
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LT7101
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Efficiency vs Input Voltage VIN Input Current in Regulation vs VOUT = 5V, Burst Mode Operation Efficiency vs Frequency at 1A Input Voltage
100 100 10 fSW = 300kHz I V LOAD = 0.5A OUT = 3.3V 95 FIGURE 14 CIRCUIT 95 FIGURE 14 CIRCUIT ILOAD = 0 FIGURE 16 CIRCUIT 90 90 8 85 85 80 80 6 75 75 Y CURRENT (µA) 70 70 4 EFFICIENCY (%) EFFICIENCY (%) 65 65 SUPPL ILOAD = 1A VIN = 12V V IN 60 I 60 2 LOAD = 500mA VIN = 24V I 55 LOAD = 100mA 55 VIN = 48V ILOAD = 10mA VIN = 72V 50 50 0 0 20 40 60 80 100 0.2 1 2 0 10 20 30 40 50 60 70 80 90 100 INPUT VOLTAGE (V) FREQUENCY (MHz) VIN VOLTAGE (V) 7101 G10 7101 G11 7101 G12
Regulated Feedback Voltage vs Average Output Current vs VIN, Average Output Current vs Temperature ICTRL Temperature
1.005 1.4 1.4 VPRG1 = FLOAT FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT 1.004 VPRG2 = FLOAT 1.2 1.2 V 1.003 ICTRL = 1.3V OR FLOAT ICTRL = 1.3V OR FLOAT TAGE (V) 1.002 1.0 1.0 1.001 0.8 0.8 1.000 ICTRL = 0.94V 0.999 0.6 0.6 VICTRL = 0.76V TED FEEDBACK VOL 0.998 0.4 0.4 0.997 ICTRL = 0.58 AVERAGE OUTPUT CURRENT (A) AVERAGE OUTPUT CURRENT (A) REGULA 0.2 0.2 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) 7101 G13 7101 G14 7101 G15
Peak Current Limit vs Output Current Monitor vs Output Current Monitor Error vs Temperature Average Output Current Average Output Current
1.80 1.4 2.0 V FIGURE 14 CIRCUIT ICTRL = 1V FIGURE 14 CIRCUIT 1.75 1.2 1.0 1.70 1.0 1.65 TAGE (V) 0 VOL 0.8 TAGE ERROR (%) 1.60 I MON VOL PEAK CURRENT LIMIT (A) –1.0 0.6 I MON 1.55 VIN = 24V VIN = 72V VIN = 48V VIN = 48V VIN = 72V VIN = 24V 1.50 0.4 –2.0 –55 –25 5 35 65 95 125 155 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 TEMPERATURE (°C) AVERAGE OUTPUT CURRENT (A) AVERAGE OUTPUT CURRENT (A) 7101 G16 7101 G17 7101 G18 Rev. 0 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 Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Efficiency vs Input Voltage VIN Input Current in Regulation vs VOUT = 5V, Burst Mode Operation Efficiency vs Frequency at 1A Input Voltage
100 100 10 fSW = 300kHz I V LOAD = 0.5A OUT = 3.3V 95 FIGURE 14 CIRCUIT 95 FIGURE 14 CIRCUIT ILOAD = 0 FIGURE 16 CIRCUIT 90 90 8 85 85 80 80 6 75 75 Y CURRENT (µA) 70 70 4 EFFICIENCY (%) EFFICIENCY (%) 65 65 SUPPL ILOAD = 1A VIN = 12V V IN 60 I 60 2 LOAD = 500mA VIN = 24V I 55 LOAD = 100mA 55 VIN = 48V ILOAD = 10mA VIN = 72V 50 50 0 0 20 40 60 80 100 0.2 1 2 0 10 20 30 40 50 60 70 80 90 100 INPUT VOLTAGE (V) FREQUENCY (MHz) VIN VOLTAGE (V) 7101 G10 7101 G11 7101 G12
Regulated Feedback Voltage vs Average Output Current vs VIN, Average Output Current vs Temperature ICTRL Temperature
1.005 1.4 1.4 VPRG1 = FLOAT FIGURE 14 CIRCUIT FIGURE 14 CIRCUIT 1.004 VPRG2 = FLOAT 1.2 1.2 V 1.003 ICTRL = 1.3V OR FLOAT ICTRL = 1.3V OR FLOAT TAGE (V) 1.002 1.0 1.0 1.001 0.8 0.8 1.000 ICTRL = 0.94V 0.999 0.6 0.6 VICTRL = 0.76V TED FEEDBACK VOL 0.998 0.4 0.4 0.997 ICTRL = 0.58 AVERAGE OUTPUT CURRENT (A) AVERAGE OUTPUT CURRENT (A) REGULA 0.2 0.2 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) 7101 G13 7101 G14 7101 G15
Peak Current Limit vs Output Current Monitor vs Output Current Monitor Error vs Temperature Average Output Current Average Output Current
1.80 1.4 2.0 V FIGURE 14 CIRCUIT ICTRL = 1V FIGURE 14 CIRCUIT 1.75 1.2 1.0 1.70 1.0 1.65 TAGE (V) 0 VOL 0.8 TAGE ERROR (%) 1.60 I MON VOL PEAK CURRENT LIMIT (A) –1.0 0.6 I MON 1.55 VIN = 24V VIN = 72V VIN = 48V VIN = 48V VIN = 72V VIN = 24V 1.50 0.4 –2.0 –55 –25 5 35 65 95 125 155 0 0.2 0.4 0.6 0.8 1.0 1.2 0 0.2 0.4 0.6 0.8 1.0 1.2 TEMPERATURE (°C) AVERAGE OUTPUT CURRENT (A) AVERAGE OUTPUT CURRENT (A) 7101 G16 7101 G17 7101 G18 Rev. 0 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 Typical Applications Package Description Typical Application Related Parts