Datasheet LTC3371 (Analog Devices) - 8
| Hersteller | Analog Devices |
| Beschreibung | 4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset |
| Seiten / Seite | 26 / 8 — 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 Efficiency vs ILOAD,
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LTC3371
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. 1A Buck Efficiency vs ILOAD, PMOS RDS(ON) vs Temperature NMOS RDS(ON) vs Temperature VOUT = 1.2V
550 450 100 VIN = 2.25V VIN = 2.25V 90 500 VIN = 3.3V 400 VIN = 3.3V 80 VIN = 5.5V VIN = 5.5V BURST 450 70 MODE 350 400 60 VOUT = 1.2V FORCED f (mΩ) (mΩ) OSC = 2MHz 350 300 50 CONTINUOUS L = 2.2µH MODE 40 R DS(ON) 300 R DS(ON) EFFICIENCY (%) VIN = 2.25V 250 30 VIN = 3.3V 250 V 20 IN = 5.5V V 200 IN = 2.25V 200 10 VIN = 3.3V V 150 150 0 IN = 5.5V –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 1 10 100 1000 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 3371 G19 3371 G20 3371 G21
1A Buck Power Loss vs ILOAD, 1A Buck Efficiency vs ILOAD, 1A Buck Power Loss vs ILOAD, VOUT = 1.2V VOUT = 1.8V VOUT = 1.8V
1000 100 1000 BURST MODE BURST MODE 900 V 900 OUT = 1.2V 90 VOUT = 1.8V 800 fOSC = 2MHz f 80 BURST 800 OSC = 2MHz L = 2.2µH L = 2.2µH MODE 700 70 700 600 60 600 VIN = 2.25V 500 50 V 500 IN = 3.3V 400 40 VIN = 5.5V 400 EFFICIENCY (%) VIN = 2.25V POWER LOSS (mW) 300 30 V POWER LOSS (mW) 300 IN = 3.3V VIN = 2.25V V 200 V 20 IN = 5.5V 200 IN = 2.25V VIN = 3.3V VOUT = 1.8V VIN = 3.3V 100 VIN = 5.5V 10 FORCED fOSC = 2MHz 100 VIN = 5.5V CONTINUOUS MODE L = 2.2µH 0 0 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G22 3371 G24 3371 G23
1A Buck Efficiency vs ILOAD, 1A Buck Power Loss vs ILOAD, 1A Buck Efficiency vs ILOAD, VOUT = 2.5V VOUT = 2.5V VOUT = 3.3V
100 1000 100 BURST MODE 90 BURST 900 90 VOUT = 2.5V 80 MODE 800 fOSC = 2MHz 80 L = 2.2µH BURST 70 700 70 MODE 60 V 600 60 IN = 2.7V V 50 V IN = 4.2V IN = 3.3V 500 50 V V IN = 5.5V 40 IN = 5.5V V V 400 40 IN = 4.2V EFFICIENCY (%) IN = 2.7V EFFICIENCY (%) VIN = 5.5V 30 VIN = 3.3V POWER LOSS (mW) 300 30 VIN = 5.5V 20 V V 200 IN = 2.7V 20 OUT = 2.5V VOUT = 3.3V V 10 FORCED f IN = 3.3V OSC = 2MHz 100 10 FORCED fOSC = 2MHz CONTINUOUS MODE V L = 2.2µH IN = 5.5V CONTINUOUS MODE L = 2.2µH 0 0 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G25 3371 G26 3371 G27 3371fb 8 For more information www.linear.com/LTC3371 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 Efficiency vs ILOAD, PMOS RDS(ON) vs Temperature NMOS RDS(ON) vs Temperature VOUT = 1.2V
550 450 100 VIN = 2.25V VIN = 2.25V 90 500 VIN = 3.3V 400 VIN = 3.3V 80 VIN = 5.5V VIN = 5.5V BURST 450 70 MODE 350 400 60 VOUT = 1.2V FORCED f (mΩ) (mΩ) OSC = 2MHz 350 300 50 CONTINUOUS L = 2.2µH MODE 40 R DS(ON) 300 R DS(ON) EFFICIENCY (%) VIN = 2.25V 250 30 VIN = 3.3V 250 V 20 IN = 5.5V V 200 IN = 2.25V 200 10 VIN = 3.3V V 150 150 0 IN = 5.5V –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 1 10 100 1000 TEMPERATURE (°C) TEMPERATURE (°C) LOAD CURRENT (mA) 3371 G19 3371 G20 3371 G21
1A Buck Power Loss vs ILOAD, 1A Buck Efficiency vs ILOAD, 1A Buck Power Loss vs ILOAD, VOUT = 1.2V VOUT = 1.8V VOUT = 1.8V
1000 100 1000 BURST MODE BURST MODE 900 V 900 OUT = 1.2V 90 VOUT = 1.8V 800 fOSC = 2MHz f 80 BURST 800 OSC = 2MHz L = 2.2µH L = 2.2µH MODE 700 70 700 600 60 600 VIN = 2.25V 500 50 V 500 IN = 3.3V 400 40 VIN = 5.5V 400 EFFICIENCY (%) VIN = 2.25V POWER LOSS (mW) 300 30 V POWER LOSS (mW) 300 IN = 3.3V VIN = 2.25V V 200 V 20 IN = 5.5V 200 IN = 2.25V VIN = 3.3V VOUT = 1.8V VIN = 3.3V 100 VIN = 5.5V 10 FORCED fOSC = 2MHz 100 VIN = 5.5V CONTINUOUS MODE L = 2.2µH 0 0 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G22 3371 G24 3371 G23
1A Buck Efficiency vs ILOAD, 1A Buck Power Loss vs ILOAD, 1A Buck Efficiency vs ILOAD, VOUT = 2.5V VOUT = 2.5V VOUT = 3.3V
100 1000 100 BURST MODE 90 BURST 900 90 VOUT = 2.5V 80 MODE 800 fOSC = 2MHz 80 L = 2.2µH BURST 70 700 70 MODE 60 V 600 60 IN = 2.7V V 50 V IN = 4.2V IN = 3.3V 500 50 V V IN = 5.5V 40 IN = 5.5V V V 400 40 IN = 4.2V EFFICIENCY (%) IN = 2.7V EFFICIENCY (%) VIN = 5.5V 30 VIN = 3.3V POWER LOSS (mW) 300 30 VIN = 5.5V 20 V V 200 IN = 2.7V 20 OUT = 2.5V VOUT = 3.3V V 10 FORCED f IN = 3.3V OSC = 2MHz 100 10 FORCED fOSC = 2MHz CONTINUOUS MODE V L = 2.2µH IN = 5.5V CONTINUOUS MODE L = 2.2µH 0 0 0 1 10 100 1000 1 10 100 1000 1 10 100 1000 LOAD CURRENT (mA) LOAD CURRENT (mA) LOAD CURRENT (mA) 3371 G25 3371 G26 3371 G27 3371fb 8 For more information www.linear.com/LTC3371 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