Datasheet LT8650S (Analog Devices) - 4
| Manufacturer | Analog Devices |
| Description | Dual Channel 4A, 42V, Synchronous Step-Down Silent Switcher 2 with 6.2µA Quiescent Current |
| Pages / Page | 32 / 4 — TYPICAL PERFORMANCE CHARACTERISTICS. 5VOUT Efficiency. 3.3VOUT … |
| Revision | A |
| File Format / Size | PDF / 1.4 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS. 5VOUT Efficiency. 3.3VOUT Efficiency. Efficiency at Different fSW. Efficiency vs fSW
Model Line for this Datasheet
LT8650S
Text Version of Document
LT8650S
TYPICAL PERFORMANCE CHARACTERISTICS 5VOUT Efficiency 5VOUT Efficiency
100 6.0 100 fSW = 2MHz EFFICIENCY f 95 SW = 2MHz FCM 5.5 90 90 5.0 80 85 4.5 POWER LOSS (W) BURST 70 80 4.0 75 3.5 60 70 12V 3.0 50 24V 65 FCM 36V 2.5 40 EFFICIENCY (%) 60 2.0 EFFICIENCY (%) 12V 30 55 1.5 24V POWER LOSS 20 50 1.0 36V 45 10 L = XFL5030, 1.0µH 0.5 L = XFL5030, 1.0µH 40 0 0 0 1 2 3 4 5 6 0.1 1 10 100 1k 10k LOAD CURRENT (A) LOAD CURRENT (mA) 8650S G01 8650S G02
3.3VOUT Efficiency 3.3VOUT Efficiency
100 6.0 100 fSW = 2MHz f 95 EFFICIENCY SW = 2MHz 5.5 FCM 90 90 5.0 80 85 4.5 BURST POWER LOSS (W) 70 80 4.0 60 75 3.5 12V 70 3.0 50 24V FCM 65 36V 2.5 40 EFFICIENCY (%) 2.0 EFFICIENCY (%) 60 12V 30 55 1.5 24V 20 36V POWER LOSS 50 1.0 10 45 0.5 L = XFL5030, 1.0µH L = XFL5030, 1.0µH 40 0 0 0 1 2 3 4 5 6 0.1 1 10 100 1k 10k LOAD CURRENT (A) LOAD CURRENT (mA) 8650S G03 8650S G04
Efficiency at Different fSW Efficiency vs fSW Reference Voltage
100 100 0.810 0.808 95 95 0.806 0.804 90 90 TAGE (V) 0.802 85 85 0.800 0.798 EFFICIENCY (%) 80 EFFICIENCY (%) 80 0.796 12VIN REFERENCE VOL 0.5MHz 2.2µH 3.3V 0.794 75 12VIN 1MHz 1.5µH OUT 75 3.3VOUT 2MHz 1.5µH 1.8A LOAD 0.792 L = IHLP2525EZ–01 3MHz 1.5µH L = IHLP2525EZ–01, 1.5µH 70 70 0.790 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0.5 1 1.5 2 2.5 3 –55 –25 5 35 65 95 125 155 LOAD CURRENT (A) SWITCHING FREQUENCY (MHz) TEMPERATURE (°C) 8650s G05 8650s G06 8650S G07 Rev A 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS 5VOUT Efficiency 5VOUT Efficiency
100 6.0 100 fSW = 2MHz EFFICIENCY f 95 SW = 2MHz FCM 5.5 90 90 5.0 80 85 4.5 POWER LOSS (W) BURST 70 80 4.0 75 3.5 60 70 12V 3.0 50 24V 65 FCM 36V 2.5 40 EFFICIENCY (%) 60 2.0 EFFICIENCY (%) 12V 30 55 1.5 24V POWER LOSS 20 50 1.0 36V 45 10 L = XFL5030, 1.0µH 0.5 L = XFL5030, 1.0µH 40 0 0 0 1 2 3 4 5 6 0.1 1 10 100 1k 10k LOAD CURRENT (A) LOAD CURRENT (mA) 8650S G01 8650S G02
3.3VOUT Efficiency 3.3VOUT Efficiency
100 6.0 100 fSW = 2MHz f 95 EFFICIENCY SW = 2MHz 5.5 FCM 90 90 5.0 80 85 4.5 BURST POWER LOSS (W) 70 80 4.0 60 75 3.5 12V 70 3.0 50 24V FCM 65 36V 2.5 40 EFFICIENCY (%) 2.0 EFFICIENCY (%) 60 12V 30 55 1.5 24V 20 36V POWER LOSS 50 1.0 10 45 0.5 L = XFL5030, 1.0µH L = XFL5030, 1.0µH 40 0 0 0 1 2 3 4 5 6 0.1 1 10 100 1k 10k LOAD CURRENT (A) LOAD CURRENT (mA) 8650S G03 8650S G04
Efficiency at Different fSW Efficiency vs fSW Reference Voltage
100 100 0.810 0.808 95 95 0.806 0.804 90 90 TAGE (V) 0.802 85 85 0.800 0.798 EFFICIENCY (%) 80 EFFICIENCY (%) 80 0.796 12VIN REFERENCE VOL 0.5MHz 2.2µH 3.3V 0.794 75 12VIN 1MHz 1.5µH OUT 75 3.3VOUT 2MHz 1.5µH 1.8A LOAD 0.792 L = IHLP2525EZ–01 3MHz 1.5µH L = IHLP2525EZ–01, 1.5µH 70 70 0.790 0.5 1 1.5 2 2.5 3 3.5 4 4.5 5 0.5 1 1.5 2 2.5 3 –55 –25 5 35 65 95 125 155 LOAD CURRENT (A) SWITCHING FREQUENCY (MHz) TEMPERATURE (°C) 8650s G05 8650s G06 8650S G07 Rev A 4 For more information www.analog.com Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Electrical Characteristics Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
