Datasheet LT8636, LT8637 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 42V, 5A/7A Peak Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current |
| Pages / Page | 32 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. 12VIN to 5VOUT Efficiency. 12VIN to … |
| Revision | C |
| File Format / Size | PDF / 2.7 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. 12VIN to 5VOUT Efficiency. 12VIN to 3.3VOUT Efficiency. vs Frequency. Efficiency at 5VOUT
Model Line for this Datasheet
Text Version of Document
LT8636/LT8637
TYPICAL PERFORMANCE CHARACTERISTICS 12VIN to 5VOUT Efficiency 12VIN to 3.3VOUT Efficiency vs Frequency vs Frequency Efficiency at 5VOUT
100 3.2 100 3.2 100 3.0 L = XEL6060, 2.7µH 95 2.8 95 2.8 95 2.7 90 2.4 EFFICIENCY 90 2.4 90 2.4 POWER LOSS (W) EFFICIENCY EFFICIENCY POWER LOSS (W) 85 2.1 POWER LOSS (W) 85 2.0 85 2.0 80 1.8 80 1.6 80 1.6 75 1.5 75 1.2 70 1.2 EFFICIENCY (%) 75 1.2 EFFICIENCY (%) EFFICIENCY (%) POWER LOSS POWER LOSS POWER LOSS 65 0.9 70 L = XEL6060 0.8 70 L = XEL6060 0.8 fSW = 1MHz 60 0.6 1MHz, L = 2.7µH 1MHz, L = 2.2µH VIN = 12V 65 2MHz, L = 1.5µH 0.4 65 2MHz, L = 1µH 0.4 55 VIN = 24V 0.3 3MHz, L = 1µH 3MHz, L = 1µH VIN = 36V 60 0 60 0 50 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 1 2 3 4 5 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8636 G01 8636 G02 8636 G03
LT8636 Low Load Efficiency at LT8637 Low Load Efficiency at Efficiency at 3.3VOUT 5VOUT 5VOUT
100 3.0 100 100 L = XEL6060, 2.2µH 95 2.7 90 90 90 2.4 80 80 85 EFFICIENCY 2.1 POWER LOSS (W) 70 80 1.8 70 60 75 1.5 60 50 70 1.2 Burst Mode OPERATION EFFICIENCY (%) POWER LOSS 50 EFFICIENCY (%) EFFICIENCY (%) 65 0.9 fSW = 1MHz 40 V f IN = 12V SW = 1MHz L = XEL6060, 4.7µH 40 V 60 IN = 24V 30 V 0.6 IN = 12V VIN = 12V VIN = 36V 55 VIN = 24V 0.3 30 VIN = 24V 20 f V SW = 1MHz IN = 36V VIN = 36V L = IHLP3232DZ–01, 4.7µH 50 0 20 10 0 1 2 3 4 5 0.01 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (A) LOAD CURRENT (mA) LOAD CURRENT (mA) 8636 G04 8636 G05 8636 G06
LT8636 Low Load Efficiency at LT8637 Low Load Efficiency at 3.3VOUT 3.3VOUT Efficiency vs Frequency
100 100 96 90 90 94 80 80 92 70 70 90 60 60 88 50 50 Burst Mode OPERATION 86 EFFICIENCY (%) f EFFICIENCY (%) 40 EFFICIENCY (%) SW = 1MHz VIN = 12V 40 L = XEL6060, 4.7µH VIN = 24V 84 30 V V IN = 12V V IN = 36V IN = 12V VOUT = 3.3V 30 V 20 f 82 IN = 24V SW = 1MHz ILOAD = 2A VIN = 36V L = IHLP3232DZ–01, 4.7µH L = IHLP3232DZ-01, 4.7µH 20 10 80 0.01 0.1 1 10 100 1000 0.1 1 10 100 1000 0 0.5 1 1.5 2 2.5 3 LOAD CURRENT (mA) LOAD CURRENT (mA) SWITCHING FREQUENCY (MHz) 8636 G07 8636 G08 8636 G09 Rev. C For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS 12VIN to 5VOUT Efficiency 12VIN to 3.3VOUT Efficiency vs Frequency vs Frequency Efficiency at 5VOUT
100 3.2 100 3.2 100 3.0 L = XEL6060, 2.7µH 95 2.8 95 2.8 95 2.7 90 2.4 EFFICIENCY 90 2.4 90 2.4 POWER LOSS (W) EFFICIENCY EFFICIENCY POWER LOSS (W) 85 2.1 POWER LOSS (W) 85 2.0 85 2.0 80 1.8 80 1.6 80 1.6 75 1.5 75 1.2 70 1.2 EFFICIENCY (%) 75 1.2 EFFICIENCY (%) EFFICIENCY (%) POWER LOSS POWER LOSS POWER LOSS 65 0.9 70 L = XEL6060 0.8 70 L = XEL6060 0.8 fSW = 1MHz 60 0.6 1MHz, L = 2.7µH 1MHz, L = 2.2µH VIN = 12V 65 2MHz, L = 1.5µH 0.4 65 2MHz, L = 1µH 0.4 55 VIN = 24V 0.3 3MHz, L = 1µH 3MHz, L = 1µH VIN = 36V 60 0 60 0 50 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0 1 2 3 4 5 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8636 G01 8636 G02 8636 G03
LT8636 Low Load Efficiency at LT8637 Low Load Efficiency at Efficiency at 3.3VOUT 5VOUT 5VOUT
100 3.0 100 100 L = XEL6060, 2.2µH 95 2.7 90 90 90 2.4 80 80 85 EFFICIENCY 2.1 POWER LOSS (W) 70 80 1.8 70 60 75 1.5 60 50 70 1.2 Burst Mode OPERATION EFFICIENCY (%) POWER LOSS 50 EFFICIENCY (%) EFFICIENCY (%) 65 0.9 fSW = 1MHz 40 V f IN = 12V SW = 1MHz L = XEL6060, 4.7µH 40 V 60 IN = 24V 30 V 0.6 IN = 12V VIN = 12V VIN = 36V 55 VIN = 24V 0.3 30 VIN = 24V 20 f V SW = 1MHz IN = 36V VIN = 36V L = IHLP3232DZ–01, 4.7µH 50 0 20 10 0 1 2 3 4 5 0.01 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (A) LOAD CURRENT (mA) LOAD CURRENT (mA) 8636 G04 8636 G05 8636 G06
LT8636 Low Load Efficiency at LT8637 Low Load Efficiency at 3.3VOUT 3.3VOUT Efficiency vs Frequency
100 100 96 90 90 94 80 80 92 70 70 90 60 60 88 50 50 Burst Mode OPERATION 86 EFFICIENCY (%) f EFFICIENCY (%) 40 EFFICIENCY (%) SW = 1MHz VIN = 12V 40 L = XEL6060, 4.7µH VIN = 24V 84 30 V V IN = 12V V IN = 36V IN = 12V VOUT = 3.3V 30 V 20 f 82 IN = 24V SW = 1MHz ILOAD = 2A VIN = 36V L = IHLP3232DZ–01, 4.7µH L = IHLP3232DZ-01, 4.7µH 20 10 80 0.01 0.1 1 10 100 1000 0.1 1 10 100 1000 0 0.5 1 1.5 2 2.5 3 LOAD CURRENT (mA) LOAD CURRENT (mA) SWITCHING FREQUENCY (MHz) 8636 G07 8636 G08 8636 G09 Rev. C For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
