Datasheet LT8610 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 42V, 2.5A Synchronous Step-Down Regulator with 2.5μA Quiescent Current |
| 页数 / 页 | 22 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. No Load Supply Current. Top FET … |
| 文件格式/大小 | PDF / 308 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. No Load Supply Current. Top FET Current Limit vs Duty Cycle. Top FET Current Limit
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LT8610
TYPICAL PERFORMANCE CHARACTERISTICS No Load Supply Current No Load Supply Current Top FET Current Limit vs Duty Cycle
5.0 25 6.0 V V 4.5 OUT = 3.3V OUT = 3.3V IN REGULATION VIN = 12V 5.5 4.0 20 IN REGULATION 5.0 3.5 3.0 15 4.5 2.5 4.0 2.0 10 3.5 INPUT CURRENT (µA) 1.5 INPUT CURRENT (µA) CURRENT LIMIT (A) 3.0 1.0 5 0.5 2.5 0 0 2.0 0 5 10 15 20 25 30 35 40 45 –55 –25 5 35 65 95 125 155 0 0.2 0.4 0.6 0.8 1.0 INPUT VOLTAGE (V) TEMPERATURE (°C) DUTY CYCLE 8610 G10 8610 G11 8610 G13
Top FET Current Limit Bottom FET Current Limit Switch Drop
5.0 3.6 250 SWITCH CURRENT = 1A 3.4 4.5 30% DC 200 3.2 4.0 150 70% DC TOP SW 3.0 3.5 100 BOT SW CURRENT LIMIT (A) CURRENT LIMIT (A) 2.8 SWITCH DROP (mV) 3.0 2.6 50 2.5 2.4 0 –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8610 G14 8610 G15 8610 G40
Switch Drop Minimum On-Time Minimum Off-Time
450 80 100 ILOAD = 1A, VSYNC = 0V V 75 IN = 3.3V 400 ILOAD = 1A, VSYNC = 3V 95 ILOAD = 0.5A I 70 LOAD = 2.5A, VSYNC = 0V 350 ILOAD = 2.5A, VSYNC = 3V 90 65 300 60 85 250 TOP SW 55 80 200 50 BOT SW 75 150 SWITCH DROP (mV) 45 MINIMUM ON-TIME (ns) MINIMUM OFF-TIME (ns) 70 100 40 50 35 65 0 30 60 0 0.5 1 1.5 2 2.5 3 –55 –25 5 35 65 95 125 155 –50 –25 5 35 65 95 125 155 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 8610 G41 8610 G17 8610 G18 8610fa For more information www.linear.com/LT8610 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 No Load Supply Current No Load Supply Current Top FET Current Limit vs Duty Cycle
5.0 25 6.0 V V 4.5 OUT = 3.3V OUT = 3.3V IN REGULATION VIN = 12V 5.5 4.0 20 IN REGULATION 5.0 3.5 3.0 15 4.5 2.5 4.0 2.0 10 3.5 INPUT CURRENT (µA) 1.5 INPUT CURRENT (µA) CURRENT LIMIT (A) 3.0 1.0 5 0.5 2.5 0 0 2.0 0 5 10 15 20 25 30 35 40 45 –55 –25 5 35 65 95 125 155 0 0.2 0.4 0.6 0.8 1.0 INPUT VOLTAGE (V) TEMPERATURE (°C) DUTY CYCLE 8610 G10 8610 G11 8610 G13
Top FET Current Limit Bottom FET Current Limit Switch Drop
5.0 3.6 250 SWITCH CURRENT = 1A 3.4 4.5 30% DC 200 3.2 4.0 150 70% DC TOP SW 3.0 3.5 100 BOT SW CURRENT LIMIT (A) CURRENT LIMIT (A) 2.8 SWITCH DROP (mV) 3.0 2.6 50 2.5 2.4 0 –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 8610 G14 8610 G15 8610 G40
Switch Drop Minimum On-Time Minimum Off-Time
450 80 100 ILOAD = 1A, VSYNC = 0V V 75 IN = 3.3V 400 ILOAD = 1A, VSYNC = 3V 95 ILOAD = 0.5A I 70 LOAD = 2.5A, VSYNC = 0V 350 ILOAD = 2.5A, VSYNC = 3V 90 65 300 60 85 250 TOP SW 55 80 200 50 BOT SW 75 150 SWITCH DROP (mV) 45 MINIMUM ON-TIME (ns) MINIMUM OFF-TIME (ns) 70 100 40 50 35 65 0 30 60 0 0.5 1 1.5 2 2.5 3 –55 –25 5 35 65 95 125 155 –50 –25 5 35 65 95 125 155 SWITCH CURRENT (A) TEMPERATURE (°C) TEMPERATURE (°C) 8610 G41 8610 G17 8610 G18 8610fa For more information www.linear.com/LT8610 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