Datasheet LT8612 (Analog Devices) - 4
| 制造商 | Analog Devices |
| 描述 | 42V, 6A Synchronous Step-Down Regulator with 3μA Quiescent Current |
| 页数 / 页 | 22 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency at 5VOUT. Efficiency at … |
| 文件格式/大小 | PDF / 365 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency at 5VOUT. Efficiency at 3.3VOUT. Efficiency vs Frequency. Reference Voltage
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LT8612
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency at 5VOUT Efficiency at 3.3VOUT Efficiency at 5VOUT
100 100 100 VIN = 12V VIN = 12V VIN = 12V 95 95 90 V 90 IN = 24V 90 VIN = 24V 80 85 85 VIN = 24V 80 80 70 EFFICIENCY (%) 75 EFFICIENCY (%) 75 EFFICIENCY (%) 60 70 70 50 65 f 65 f f SW = 700kHz SW = 700kHz SW = 700kHz L = 3.9µH, EPCOS B82559 L = 3.9µH, EPCOS B82559 L = 3.9µH 60 60 40 0 1 2 3 4 5 6 0 1 2 3 4 5 6 0.00001 0.0001 0.001 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8612 G01 8612 G02 8612 G03
Efficiency at 3.3VOUT Efficiency vs Frequency Reference Voltage
100 100 0.985 VIN = 12V 0.982 90 95 0.979 0.976 80 90 VIN = 24V 0.973 70 85 0.970 0.967 EFFICIENCY (%) EFFICIENCY (%) 60 80 0.964 REFERENCE VOLTAGE (V) VOUT = 3.3V 0.961 50 75 VIN = 12V fSW = 700kHz L = 3.9µH 0.958 L = 3.9µH LOAD = 2A 40 70 0.955 0.00001 0.0001 0.001 0.01 0.1 1 10 0 500 1000 1500 2000 2500 –55 –25 5 35 65 95 125 155 LOAD CURRENT (A) FREQUENCY (kHz) TEMPERATURE (°C) 8612 G04 8612 G05 8612 G06
EN/UV Pin Thresholds Load Regulation Line Regulation
1.02 0.5 0.10 VOUT = 5V 0.4 0.08 LOAD = 1A 1.01 EN/UV RISING 0.3 0.06 1.00 0.2 0.04 (%) 0.99 0.1 OUT 0.02 0 0 0.98 –0.1 –0.02 0.97 –0.2 CHANGE IN V –0.04 EN/UV THRESHOLD (V) EN/UV FALLING LOAD REGULATION (%) –0.3 –0.06 0.96 –0.4 –0.08 0.95 –0.5 –0.10 –55 –25 0 25 50 75 100 125 150 0 1 2 3 4 5 6 0 10 20 30 40 50 TEMPERATURE (°C) OUTPUT LOAD (A) INPUT VOLTAGE (V) 8612 G07 8612 G08 8612 G09 8612fa 4 For more information www.linear.com/LT8612 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency at 5VOUT Efficiency at 3.3VOUT Efficiency at 5VOUT
100 100 100 VIN = 12V VIN = 12V VIN = 12V 95 95 90 V 90 IN = 24V 90 VIN = 24V 80 85 85 VIN = 24V 80 80 70 EFFICIENCY (%) 75 EFFICIENCY (%) 75 EFFICIENCY (%) 60 70 70 50 65 f 65 f f SW = 700kHz SW = 700kHz SW = 700kHz L = 3.9µH, EPCOS B82559 L = 3.9µH, EPCOS B82559 L = 3.9µH 60 60 40 0 1 2 3 4 5 6 0 1 2 3 4 5 6 0.00001 0.0001 0.001 0.01 0.1 1 10 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8612 G01 8612 G02 8612 G03
Efficiency at 3.3VOUT Efficiency vs Frequency Reference Voltage
100 100 0.985 VIN = 12V 0.982 90 95 0.979 0.976 80 90 VIN = 24V 0.973 70 85 0.970 0.967 EFFICIENCY (%) EFFICIENCY (%) 60 80 0.964 REFERENCE VOLTAGE (V) VOUT = 3.3V 0.961 50 75 VIN = 12V fSW = 700kHz L = 3.9µH 0.958 L = 3.9µH LOAD = 2A 40 70 0.955 0.00001 0.0001 0.001 0.01 0.1 1 10 0 500 1000 1500 2000 2500 –55 –25 5 35 65 95 125 155 LOAD CURRENT (A) FREQUENCY (kHz) TEMPERATURE (°C) 8612 G04 8612 G05 8612 G06
EN/UV Pin Thresholds Load Regulation Line Regulation
1.02 0.5 0.10 VOUT = 5V 0.4 0.08 LOAD = 1A 1.01 EN/UV RISING 0.3 0.06 1.00 0.2 0.04 (%) 0.99 0.1 OUT 0.02 0 0 0.98 –0.1 –0.02 0.97 –0.2 CHANGE IN V –0.04 EN/UV THRESHOLD (V) EN/UV FALLING LOAD REGULATION (%) –0.3 –0.06 0.96 –0.4 –0.08 0.95 –0.5 –0.10 –55 –25 0 25 50 75 100 125 150 0 1 2 3 4 5 6 0 10 20 30 40 50 TEMPERATURE (°C) OUTPUT LOAD (A) INPUT VOLTAGE (V) 8612 G07 8612 G08 8612 G09 8612fa 4 For more information www.linear.com/LT8612 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Block Diagram Operation Applications Information Typical Applications Package Description Typical Application Related Parts