Datasheet LTC3894 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 150V Low IQ Step-Down DC/DC Controller with 100% Duty Cycle Capability |
| 页数 / 页 | 36 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| 修订版 | A |
| 文件格式/大小 | PDF / 2.9 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Burst Mode Input Current Over
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LTC3894
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Burst Mode Input Current Over Pulse-Skipping Mode Input Shutdown Input Current vs Input Voltage (No Load) Current vs Input Voltage Input Voltage
30.0 5.0 8.0 VOUT = 5V VOUT = 5V FIGURE 11 CIRCUIT I ILOAD = 0A 25.0 LOAD = 0A FIGURE 11 CIRCUIT 4.2 FIGURE 11 CIRCUIT 7.0 20.0 Y CURRENT (µA) 3.4 Y CURRENT (mA) Y CURRENT (µA) 15.0 6.0 2.5 10.0 AL INPUT SUPPL 5.0 AL INPUT SUPPL 1.7 AL INPUT SUPPL 5.0 TOT TOT TOT 0 0.9 4.0 0 25 50 75 100 125 150 0 30 60 90 120 150 0 25 50 75 100 125 150 VIN (V) VIN (V) VIN (V) 3894 G10 3894 G11 3894 G12
Free Running Frequency Over Output Regulation vs Load Output Regulation vs Temperature Current Temperature
600 0.010 1.0 VIN = 12V VIN = 12V VOUT = 5V 0.8 VOUT = 5V 550 0.006 ILOAD NORMALIZED AT ILOAD = 1A ILOAD = 200mA FIGURE 11 CIRCUIT 0.6 VOUT NORMALIZED TO TA = 25°C (%) 0.4 FIGURE 11 CIRCUIT 500 (%) 0.002 V OUT 0.2 V OUT 450 0.0 F (kHz) –0.002 –0.2 400 –0.4 NORMALIZED ∆ NORMALIZED ∆ –0.006 –0.6 350 OPEN FREQ PIN Burst Mode OPERATION Burst Mode OPERATION –0.8 GND FREQ PIN PULSE–SKIPPING PULSE-SKIPPING 300 –0.010 –1.0 –75 –50 –25 0 25 50 75 100 125 150 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 –75 –25 25 75 125 150 TEMPERATURE (°C) ILOAD (A) TEMPERATURE (°C) 3894 G13 3894 G14 3894 G15
Overcurrent Protection Short-Circuit Protection VIN Line Transient Behavior
SHORT-CIRCUIT REGION 4A TRIGGER I 1A LOAD 1A 2A/DIV VOUT I 5V/DIV V L SOFT IN 2A/DIV 20V/DIV RECOVERY I GATE L VOUT 2A/DIV 20V/DIV 2V/DIV VOUT VOUT DROOPS IN CURRENT LIMIT 20mV/DIV 10ms/DIV 3894 G16 500µs/DIV 3894 G17 5ms/DIV 3894 G18 VIN = 12V VIN = 12V VIN = 12V, SURGE TO 100V VOUT = 5V VOUT = 5V VOUT = 5V FIGURE 11 CIRCUIT ILOAD = 500mA ILOAD = 2A FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT Rev. A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. Burst Mode Input Current Over Pulse-Skipping Mode Input Shutdown Input Current vs Input Voltage (No Load) Current vs Input Voltage Input Voltage
30.0 5.0 8.0 VOUT = 5V VOUT = 5V FIGURE 11 CIRCUIT I ILOAD = 0A 25.0 LOAD = 0A FIGURE 11 CIRCUIT 4.2 FIGURE 11 CIRCUIT 7.0 20.0 Y CURRENT (µA) 3.4 Y CURRENT (mA) Y CURRENT (µA) 15.0 6.0 2.5 10.0 AL INPUT SUPPL 5.0 AL INPUT SUPPL 1.7 AL INPUT SUPPL 5.0 TOT TOT TOT 0 0.9 4.0 0 25 50 75 100 125 150 0 30 60 90 120 150 0 25 50 75 100 125 150 VIN (V) VIN (V) VIN (V) 3894 G10 3894 G11 3894 G12
Free Running Frequency Over Output Regulation vs Load Output Regulation vs Temperature Current Temperature
600 0.010 1.0 VIN = 12V VIN = 12V VOUT = 5V 0.8 VOUT = 5V 550 0.006 ILOAD NORMALIZED AT ILOAD = 1A ILOAD = 200mA FIGURE 11 CIRCUIT 0.6 VOUT NORMALIZED TO TA = 25°C (%) 0.4 FIGURE 11 CIRCUIT 500 (%) 0.002 V OUT 0.2 V OUT 450 0.0 F (kHz) –0.002 –0.2 400 –0.4 NORMALIZED ∆ NORMALIZED ∆ –0.006 –0.6 350 OPEN FREQ PIN Burst Mode OPERATION Burst Mode OPERATION –0.8 GND FREQ PIN PULSE–SKIPPING PULSE-SKIPPING 300 –0.010 –1.0 –75 –50 –25 0 25 50 75 100 125 150 0.0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 –75 –25 25 75 125 150 TEMPERATURE (°C) ILOAD (A) TEMPERATURE (°C) 3894 G13 3894 G14 3894 G15
Overcurrent Protection Short-Circuit Protection VIN Line Transient Behavior
SHORT-CIRCUIT REGION 4A TRIGGER I 1A LOAD 1A 2A/DIV VOUT I 5V/DIV V L SOFT IN 2A/DIV 20V/DIV RECOVERY I GATE L VOUT 2A/DIV 20V/DIV 2V/DIV VOUT VOUT DROOPS IN CURRENT LIMIT 20mV/DIV 10ms/DIV 3894 G16 500µs/DIV 3894 G17 5ms/DIV 3894 G18 VIN = 12V VIN = 12V VIN = 12V, SURGE TO 100V VOUT = 5V VOUT = 5V VOUT = 5V FIGURE 11 CIRCUIT ILOAD = 500mA ILOAD = 2A FIGURE 11 CIRCUIT FIGURE 11 CIRCUIT Rev. A 6 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts