Datasheet LT8620 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 65V, 2A Synchronous Step-Down Regulator with 2.5μA Quiescent Current |
| 页数 / 页 | 26 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. No … |
| 文件格式/大小 | PDF / 599 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. No Load Supply Current
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LT8620
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. No Load Supply Current Top FET Current Limit vs Duty Cycle Top FET Current Limit
5.0 4.0 5.0 V 4.5 OUT = 3.3V IN REGULATION 4.0 3.5 4.5 3.5 3.0 2.5 3.0 4.0 DUTY CYCLE = 5% 2.0 INPUT CURRENT (µA) 1.5 CURRENT LIMIT (A) CURRENT LIMIT (A) 2.5 3.5 1.0 0.5 0 2.0 3.0 0 10 20 30 40 50 60 0 0.2 0.4 0.6 0.8 1.0 –55 –25 5 35 65 95 125 155 INPUT VOLTAGE (V) DUTY CYCLE TEMPERATURE (°C) 8620 G12 8620 G10 8620 G11
Bottom FET Current Limit Switch Drop Switch Drop
5.0 350 450 SWITCH CURRENT = 1A 300 400 350 4.5 250 300 TOP SWITCH 200 250 4.0 TOP SWITCH 150 200 CURRENT LIMIT (A) SWITCH DROP (mV) 150 100 SWITCH DROP (mV) 3.5 BOTTOM SWITCH 100 50 BOTTOM SWITCH 50 3.0 0 0 –55 –25 5 35 65 95 125 155 –50 –25 0 25 50 75 100 125 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 TEMPERATURE (°C) TEMPERATURE (°C) SWITCH CURRENT (A) 8620 G13 8620 G14 8620 G15
Minimum On-Time Dropout Voltage Switching Frequency
34 600 740 ILOAD = 1A, VSYNC = 0V RT = 60.4k I 32 LOAD = 1A, VSYNC = 3V 730 ILOAD = 2A, VSYNC = 0V 500 ILOAD = 2A, VSYNC = 3V 720 30 400 710 28 300 700 26 690 200 MINIMUM ON-TIME (ns) 24 DROPOUT VOLTAGE (mV) 680 SWITCHING FREQUENCY (kHz) 22 100 670 20 0 660 –50 –25 0 25 50 75 100 125 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LOAD CURRENT (A) TEMPERATURE (°C) 8620 G16 8620 G17 8620 G18 8620fa For more information www.linear.com/LT8620 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. No Load Supply Current Top FET Current Limit vs Duty Cycle Top FET Current Limit
5.0 4.0 5.0 V 4.5 OUT = 3.3V IN REGULATION 4.0 3.5 4.5 3.5 3.0 2.5 3.0 4.0 DUTY CYCLE = 5% 2.0 INPUT CURRENT (µA) 1.5 CURRENT LIMIT (A) CURRENT LIMIT (A) 2.5 3.5 1.0 0.5 0 2.0 3.0 0 10 20 30 40 50 60 0 0.2 0.4 0.6 0.8 1.0 –55 –25 5 35 65 95 125 155 INPUT VOLTAGE (V) DUTY CYCLE TEMPERATURE (°C) 8620 G12 8620 G10 8620 G11
Bottom FET Current Limit Switch Drop Switch Drop
5.0 350 450 SWITCH CURRENT = 1A 300 400 350 4.5 250 300 TOP SWITCH 200 250 4.0 TOP SWITCH 150 200 CURRENT LIMIT (A) SWITCH DROP (mV) 150 100 SWITCH DROP (mV) 3.5 BOTTOM SWITCH 100 50 BOTTOM SWITCH 50 3.0 0 0 –55 –25 5 35 65 95 125 155 –50 –25 0 25 50 75 100 125 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 TEMPERATURE (°C) TEMPERATURE (°C) SWITCH CURRENT (A) 8620 G13 8620 G14 8620 G15
Minimum On-Time Dropout Voltage Switching Frequency
34 600 740 ILOAD = 1A, VSYNC = 0V RT = 60.4k I 32 LOAD = 1A, VSYNC = 3V 730 ILOAD = 2A, VSYNC = 0V 500 ILOAD = 2A, VSYNC = 3V 720 30 400 710 28 300 700 26 690 200 MINIMUM ON-TIME (ns) 24 DROPOUT VOLTAGE (mV) 680 SWITCHING FREQUENCY (kHz) 22 100 670 20 0 660 –50 –25 0 25 50 75 100 125 0 0.25 0.5 0.75 1 1.25 1.5 1.75 2 –50 –25 0 25 50 75 100 125 150 TEMPERATURE (°C) LOAD CURRENT (A) TEMPERATURE (°C) 8620 G16 8620 G17 8620 G18 8620fa For more information www.linear.com/LT8620 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts