Datasheet LT8640S-2, LT8643S-2 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 42V, 6A Synchronous Step-Down Silent Switcher with 2.5µA Quiescent Current |
| Pages / Page | 30 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. 12VIN to 5VOUT Efficiency. 12VIN to … |
| File Format / Size | PDF / 2.6 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
LT8640S-2/LT8643S-2
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 L = WE-LHMI1040 0.8 IN = 12V VIN = 24V 1MHz, L = 3.3µH 1MHz, L = 2.2µH 60 V 0.6 65 IN = 36V 2MHz, L = 2.2µH 0.4 65 2MHz, L = 1µH 0.4 55 f 0.3 3MHz, L = 1µH SW = 1MHz 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) 8640s2 G01 8640s2 G02 8640s2 G03
LT8640S-2 Low Load Efficiency LT8643S-2 Low Load Efficiency Efficiency at 3.3VOUT Efficiency at 3.3V at 5VOUT OUT at 5VOUT
100 3.0 100 100 95 2.7 90 90 90 2.4 80 80 EFFICIENCY 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 (%) 40 65 V 0.9 VIN = 12V VIN = 12V IN = 12V V 40 VIN = 24V VIN = 24V IN = 24V 30 60 V 0.6 VIN = 36V VIN = 36V IN = 36V 55 f 0.3 30 f 20 SW = 1MHz f SW = 1MHz SW = 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) 8640s2 G04 8640s2 G05 8640s2 G06
LT8640S-2 Low Load Efficiency at LT8643S-2 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 (%) EFFICIENCY (%) 86 V 40 IN = 12V V EFFICIENCY (%) IN = 12V V 40 IN = 24V VIN = 24V 30 84 V VIN = 36V V IN = 12V IN = 36V VOUT = 3.3V 30 fSW = 1MHz 20 fSW = 1MHz 82 ILOAD = 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) 8640s2 G07 8640s2 G08 8640s2 G09 Rev 0 For more information www.analog.com 5 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION E LECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION 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 L = WE-LHMI1040 0.8 IN = 12V VIN = 24V 1MHz, L = 3.3µH 1MHz, L = 2.2µH 60 V 0.6 65 IN = 36V 2MHz, L = 2.2µH 0.4 65 2MHz, L = 1µH 0.4 55 f 0.3 3MHz, L = 1µH SW = 1MHz 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) 8640s2 G01 8640s2 G02 8640s2 G03
LT8640S-2 Low Load Efficiency LT8643S-2 Low Load Efficiency Efficiency at 3.3VOUT Efficiency at 3.3V at 5VOUT OUT at 5VOUT
100 3.0 100 100 95 2.7 90 90 90 2.4 80 80 EFFICIENCY 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 (%) 40 65 V 0.9 VIN = 12V VIN = 12V IN = 12V V 40 VIN = 24V VIN = 24V IN = 24V 30 60 V 0.6 VIN = 36V VIN = 36V IN = 36V 55 f 0.3 30 f 20 SW = 1MHz f SW = 1MHz SW = 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) 8640s2 G04 8640s2 G05 8640s2 G06
LT8640S-2 Low Load Efficiency at LT8643S-2 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 (%) EFFICIENCY (%) 86 V 40 IN = 12V V EFFICIENCY (%) IN = 12V V 40 IN = 24V VIN = 24V 30 84 V VIN = 36V V IN = 12V IN = 36V VOUT = 3.3V 30 fSW = 1MHz 20 fSW = 1MHz 82 ILOAD = 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) 8640s2 G07 8640s2 G08 8640s2 G09 Rev 0 For more information www.analog.com 5 Document Outline FEATURES DESCRIPTION APPLICATIONS TYPICAL APPLICATION ABSOLUTE MAXIMUM RATINGS PIN CONFIGURATION ORDER INFORMATION E LECTRICAL CHARACTERISTICS TYPICAL PERFORMANCE CHARACTERISTICS PIN FUNCTIONS BLOCK DIAGRAM OPERATION APPLICATIONS INFORMATION TYPICAL APPLICATIONS PACKAGE DESCRIPTION TYPICAL APPLICATIONS RELATED PARTS
