Datasheet LT8640S, LT8643S (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 42V, 6A Synchronous Step-Down Silent Switcher 2 with 2.5µA Quiescent Current |
| Pages / Page | 30 / 5 — Typical perForMance characTerisTics. 12VIN to 5VOUT Efficiency. 12VIN to … |
| File Format / Size | PDF / 2.3 Mb |
| Document Language | English |
Typical perForMance characTerisTics. 12VIN to 5VOUT Efficiency. 12VIN to 3.3VOUT Efficiency. vs Frequency. Efficiency at 5VOUT
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Text Version of Document
LT8640S/LT8643S
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 95 2.8 95 2.8 95 2.7 90 2.4 90 EFFICIENCY 2.4 90 2.4 EFFICIENCY POWER LOSS (W) 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 POWER LOSS 75 1.2 70 1.2 EFFICIENCY (%) 75 1.2 EFFICIENCY (%) EFFICIENCY (%) POWER LOSS POWER LOSS 65 V 0.9 70 L = WE-LHMI1040 0.8 70 IN = 12V L = WE-LHMI1040 0.8 VIN = 24V 1MHz, L = 3.3µH 60 0.6 1MHz, L = 2.2µH V 65 IN = 36V 2MHz, L = 2.2µH 0.4 65 2MHz, L = 1µH 0.4 55 fSW = 1MHz 0.3 3MHz, L = 1µH 3MHz, L = 1µH L = IHLP3232DZ-01, 3.3µH 60 0 60 0 50 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 0 1 2 3 4 5 6 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8640S G01 8640S G02 8640S G03
LT8640S Low Load Efficiency at LT8643S Low Load Efficiency at Efficiency at 3.3VOUT 5VOUT OUT 5VOUT
100 3.0 100 100 95 2.7 90 90 90 2.4 80 EFFICIENCY 80 85 2.1 POWER LOSS (W) 70 80 1.8 70 60 75 1.5 60 50 70 POWER LOSS 1.2 EFFICIENCY (%) 50 EFFICIENCY (%) EFFICIENCY (%) 65 40 VIN = 12V 0.9 VIN = 12V VIN = 12V V 40 IN = 24V V V 60 IN = 24V IN = 24V 30 V 0.6 IN = 36V VIN = 36V VIN = 36V 55 f 30 SW = 1MHz 0.3 fSW = 1MHz 20 fSW = 1MHz L = IHLP3232DZ-01, 2.2µH L = IHLP3232DZ-01, 4.7µH L = IHLP3232DZ–01, 4.7µH 50 0 20 10 0 1 2 3 4 5 6 0.01 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (A) LOAD CURRENT (mA) LOAD CURRENT (mA) 8640S G04 8640 G05 8640 G06
LT8640S Low Load Efficiency at LT8643S Low Load Efficiency at 3.3VOUT 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 EFFICIENCY (%) 86 V EFFICIENCY (%) EFFICIENCY (%) IN = 12V 40 VIN = 12V V 40 IN = 24V VIN = 24V 84 V V 30 IN = 12V IN = 36V VIN = 36V VOUT = 3.3V 30 fSW = 1MHz 20 f 82 I SW = 1MHz LOAD = 2A L = IHLP3232DZ-01, 4.7µH 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) 8640S G07 8640S G08 8640S G09 8640sfa For more information www.linear.com/LT8640S 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information 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 95 2.8 95 2.8 95 2.7 90 2.4 90 EFFICIENCY 2.4 90 2.4 EFFICIENCY POWER LOSS (W) 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 POWER LOSS 75 1.2 70 1.2 EFFICIENCY (%) 75 1.2 EFFICIENCY (%) EFFICIENCY (%) POWER LOSS POWER LOSS 65 V 0.9 70 L = WE-LHMI1040 0.8 70 IN = 12V L = WE-LHMI1040 0.8 VIN = 24V 1MHz, L = 3.3µH 60 0.6 1MHz, L = 2.2µH V 65 IN = 36V 2MHz, L = 2.2µH 0.4 65 2MHz, L = 1µH 0.4 55 fSW = 1MHz 0.3 3MHz, L = 1µH 3MHz, L = 1µH L = IHLP3232DZ-01, 3.3µH 60 0 60 0 50 0 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 5.5 6 0 1 2 3 4 5 6 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 8640S G01 8640S G02 8640S G03
LT8640S Low Load Efficiency at LT8643S Low Load Efficiency at Efficiency at 3.3VOUT 5VOUT OUT 5VOUT
100 3.0 100 100 95 2.7 90 90 90 2.4 80 EFFICIENCY 80 85 2.1 POWER LOSS (W) 70 80 1.8 70 60 75 1.5 60 50 70 POWER LOSS 1.2 EFFICIENCY (%) 50 EFFICIENCY (%) EFFICIENCY (%) 65 40 VIN = 12V 0.9 VIN = 12V VIN = 12V V 40 IN = 24V V V 60 IN = 24V IN = 24V 30 V 0.6 IN = 36V VIN = 36V VIN = 36V 55 f 30 SW = 1MHz 0.3 fSW = 1MHz 20 fSW = 1MHz L = IHLP3232DZ-01, 2.2µH L = IHLP3232DZ-01, 4.7µH L = IHLP3232DZ–01, 4.7µH 50 0 20 10 0 1 2 3 4 5 6 0.01 0.1 1 10 100 1000 0.1 1 10 100 1000 LOAD CURRENT (A) LOAD CURRENT (mA) LOAD CURRENT (mA) 8640S G04 8640 G05 8640 G06
LT8640S Low Load Efficiency at LT8643S Low Load Efficiency at 3.3VOUT 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 EFFICIENCY (%) 86 V EFFICIENCY (%) EFFICIENCY (%) IN = 12V 40 VIN = 12V V 40 IN = 24V VIN = 24V 84 V V 30 IN = 12V IN = 36V VIN = 36V VOUT = 3.3V 30 fSW = 1MHz 20 f 82 I SW = 1MHz LOAD = 2A L = IHLP3232DZ-01, 4.7µH 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) 8640S G07 8640S G08 8640S G09 8640sfa For more information www.linear.com/LT8640S 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Package Description Revision History Typical Applications Related Parts
