Datasheet LTC3371 (Analog Devices) - 9
| Hersteller | Analog Devices |
| Beschreibung | 4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset |
| Seiten / Seite | 26 / 9 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. 1A … |
| Dateiformat / Größe | PDF / 1.1 Mb |
| Dokumentensprache | Englisch |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. 1A Buck Power Loss vs ILOAD,
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LTC3371
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. 1A Buck Power Loss vs ILOAD, 2A Buck Efficiency vs ILOAD, 2A Buck Efficiency vs ILOAD, VOUT = 3.3V VOUT = 1.8V VOUT = 2.5V
1000 100 BURST MODE 100 BURST MODE 900 90 90 VOUT = 3.3V 800 fOSC = 2MHz 80 80 BURST MODE L = 2.2µH 700 70 FORCED 70 CONTINUOUS 600 60 VOUT = 1.8V MODE 60 V FORCED OUT = 2.5V f f 500 50 OSC = 2MHz CONTINUOUS OSC = 2MHz L = 2.2µH 50 L = 2.2µH MODE 400 40 40 EFFICIENCY (%) VIN = 2.25V EFFICIENCY (%) VIN = 2.7V POWER LOSS (mW) 300 30 VIN = 3.3V 30 VIN = 3.3V V V 200 20 IN = 5.5V IN = 5.5V VIN = 4.2V V 20 IN = 2.25V VIN = 2.7V 100 VIN = 5.5V 10 VIN = 3.3V 10 VIN = 3.3V V V 0 0 IN = 5.5V 0 IN = 5.5V 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G28 3371 G29 3371 G30
3A Buck Efficiency vs ILOAD, 3A Buck Efficiency vs ILOAD, 4A Buck Efficiency vs ILOAD, VOUT = 1.8V VOUT = 2.5V VOUT = 1.8V
100 100 100 90 90 90 80 BURST MODE 80 BURST MODE 80 BURST MODE 70 70 70 FORCED 60 CONTINUOUS VOUT = 1.8V 60 VOUT = 2.5V 60 VOUT = 1.8V MODE f f f 50 OSC = 2MHz OSC = 2MHz OSC = 2MHz L = 2.2µH 50 FORCED L = 2.2µH 50 FORCED L = 2.2µH CONTINUOUS 40 40 CONTINUOUS 40 MODE EFFICIENCY (%) VIN = 2.25V EFFICIENCY (%) MODE VIN = 2.7V EFFICIENCY (%) VIN = 2.25V 30 VIN = 3.3V 30 VIN = 3.3V 30 VIN = 3.3V V V V 20 IN = 5.5V IN = 5.5V IN = 5.5V V 20 20 IN = 2.25V VIN = 2.7V VIN = 2.25V 10 VIN = 3.3V 10 VIN = 3.3V 10 VIN = 3.3V V V VIN = 5.5V 0 IN = 5.5V 0 IN = 5.5V 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G31 3371 G32 3371 G33
4A Buck Efficiency vs ILOAD, 1A Buck Efficiency vs ILOAD 1A Buck Efficiency vs Frequency VOUT = 2.5V (Across Operating Frequency) (Forced Continuous Mode)
100 100 100 VIN = 2.25V 90 90 90 BURST MODE VIN = 3.3V 80 80 BURST MODE 80 70 70 V 70 OUT = 1.8V FORCED VIN = 5.5V 60 VOUT = 2.5V 60 VIN = 3.3V 60 f CONTINUOUS OSC = 2MHz 50 L = 2.2µH 50 MODE 50 40 FORCED 40 40 EFFICIENCY (%) CONTINUOUS VIN = 2.7V EFFICIENCY (%) fOSC = 1MHz, L = 3.3µH EFFICIENCY (%) 30 MODE VIN = 3.3V 30 fOSC = 2MHz, L = 2.2µH 30 V f 20 IN = 5.5V OSC = 3MHz, L = 1µH V 20 20 IN = 2.7V fOSC = 1MHz, L = 3.3µH VOUT = 1.8V 10 VIN = 3.3V 10 fOSC = 2MHz, L = 2.2µH 10 ILOAD = 100mA VIN = 5.5V f L = 3.3µH 0 0 OSC = 3MHz, L = 1µH 0 1 10 100 1000 1 10 100 1000 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 LOAD CURRENT (mA) LOAD CURRENT (mA) FREQUENCY (MHz) 3371 G36 3371 G34 3371 G35 3371fb For more information www.linear.com/LTC3371 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Buck Switching Regulators Buck Regulators with Combined Power Stages Power Failure Reporting Via RST Pins Temperature Monitoring and Overtemperature Protection Programming the Operating Frequency Windowed Watchdog Timer Choosing the CT Capacitor Applications Information Buck Switching Regulator Output Voltage and Feedback Network Buck Regulators Combined Buck Power Stages Input and Output Decoupling Capacitor Selection PCB Considerations Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. 1A Buck Power Loss vs ILOAD, 2A Buck Efficiency vs ILOAD, 2A Buck Efficiency vs ILOAD, VOUT = 3.3V VOUT = 1.8V VOUT = 2.5V
1000 100 BURST MODE 100 BURST MODE 900 90 90 VOUT = 3.3V 800 fOSC = 2MHz 80 80 BURST MODE L = 2.2µH 700 70 FORCED 70 CONTINUOUS 600 60 VOUT = 1.8V MODE 60 V FORCED OUT = 2.5V f f 500 50 OSC = 2MHz CONTINUOUS OSC = 2MHz L = 2.2µH 50 L = 2.2µH MODE 400 40 40 EFFICIENCY (%) VIN = 2.25V EFFICIENCY (%) VIN = 2.7V POWER LOSS (mW) 300 30 VIN = 3.3V 30 VIN = 3.3V V V 200 20 IN = 5.5V IN = 5.5V VIN = 4.2V V 20 IN = 2.25V VIN = 2.7V 100 VIN = 5.5V 10 VIN = 3.3V 10 VIN = 3.3V V V 0 0 IN = 5.5V 0 IN = 5.5V 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G28 3371 G29 3371 G30
3A Buck Efficiency vs ILOAD, 3A Buck Efficiency vs ILOAD, 4A Buck Efficiency vs ILOAD, VOUT = 1.8V VOUT = 2.5V VOUT = 1.8V
100 100 100 90 90 90 80 BURST MODE 80 BURST MODE 80 BURST MODE 70 70 70 FORCED 60 CONTINUOUS VOUT = 1.8V 60 VOUT = 2.5V 60 VOUT = 1.8V MODE f f f 50 OSC = 2MHz OSC = 2MHz OSC = 2MHz L = 2.2µH 50 FORCED L = 2.2µH 50 FORCED L = 2.2µH CONTINUOUS 40 40 CONTINUOUS 40 MODE EFFICIENCY (%) VIN = 2.25V EFFICIENCY (%) MODE VIN = 2.7V EFFICIENCY (%) VIN = 2.25V 30 VIN = 3.3V 30 VIN = 3.3V 30 VIN = 3.3V V V V 20 IN = 5.5V IN = 5.5V IN = 5.5V V 20 20 IN = 2.25V VIN = 2.7V VIN = 2.25V 10 VIN = 3.3V 10 VIN = 3.3V 10 VIN = 3.3V V V VIN = 5.5V 0 IN = 5.5V 0 IN = 5.5V 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G31 3371 G32 3371 G33
4A Buck Efficiency vs ILOAD, 1A Buck Efficiency vs ILOAD 1A Buck Efficiency vs Frequency VOUT = 2.5V (Across Operating Frequency) (Forced Continuous Mode)
100 100 100 VIN = 2.25V 90 90 90 BURST MODE VIN = 3.3V 80 80 BURST MODE 80 70 70 V 70 OUT = 1.8V FORCED VIN = 5.5V 60 VOUT = 2.5V 60 VIN = 3.3V 60 f CONTINUOUS OSC = 2MHz 50 L = 2.2µH 50 MODE 50 40 FORCED 40 40 EFFICIENCY (%) CONTINUOUS VIN = 2.7V EFFICIENCY (%) fOSC = 1MHz, L = 3.3µH EFFICIENCY (%) 30 MODE VIN = 3.3V 30 fOSC = 2MHz, L = 2.2µH 30 V f 20 IN = 5.5V OSC = 3MHz, L = 1µH V 20 20 IN = 2.7V fOSC = 1MHz, L = 3.3µH VOUT = 1.8V 10 VIN = 3.3V 10 fOSC = 2MHz, L = 2.2µH 10 ILOAD = 100mA VIN = 5.5V f L = 3.3µH 0 0 OSC = 3MHz, L = 1µH 0 1 10 100 1000 1 10 100 1000 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 LOAD CURRENT (mA) LOAD CURRENT (mA) FREQUENCY (MHz) 3371 G36 3371 G34 3371 G35 3371fb For more information www.linear.com/LTC3371 9 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Operation Buck Switching Regulators Buck Regulators with Combined Power Stages Power Failure Reporting Via RST Pins Temperature Monitoring and Overtemperature Protection Programming the Operating Frequency Windowed Watchdog Timer Choosing the CT Capacitor Applications Information Buck Switching Regulator Output Voltage and Feedback Network Buck Regulators Combined Buck Power Stages Input and Output Decoupling Capacitor Selection PCB Considerations Typical Applications Package Description Revision History Typical Application Related Parts