Datasheet LTC3371 (Analog Devices) - 7
| Manufacturer | Analog Devices |
| Description | 4-Channel 8A Configurable Buck DC/DCs with Watchdog and Power-On Reset |
| Pages / Page | 26 / 7 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. … |
| File Format / Size | PDF / 1.1 Mb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Oscillator Frequency vs VCC
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LTC3371
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C unless otherwise noted. Oscillator Frequency vs VCC Oscillator Frequency vs RT VTEMP vs Temperature
2.2 4 1400 VCC = 3.3V ILOAD = 0mA 2.15 3.5 1200 VCC = 3.3V 2.1 3 1000 2.05 2.5 800 VRT = VCC (MHz) 2 (MHz) 2 (mV) 600 RT = 400k f OSC ACTUAL VTEMP 1.95 f OSC 1.5 V TEMP 400 1.9 1 200 1.85 0.5 0 IDEAL VTEMP 1.8 0 –200 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 250 300 350 400 450 500 550 600 650 700 750 800 –55 –25 5 35 65 95 125 155 VCC (V) RT (kΩ) TEMPERATURE (°C) 3371 G10 3371 G11 3371 G12
Enable Pin Precision Threshold Buck VIN Supply Current Enable Threshold vs Temperature vs Temperature vs Temperature
900 415 50 ALL REGULATORS DISABLED BURST MODE OPERATION 850 VCC = 3.3V 410 FB = 850mV 800 EN RISING 40 750 405 700 EN RISING 400 30 (µA) 650 395 600 20 550 390 I VIN_BURST EN THRESHOLD (mV) EN FALLING 500 EN THRESHOLD (mV) 385 V 450 10 IN = 2.25V EN FALLING 380 VIN = 3.3V 400 VIN = 5.5V 350 375 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3371 G13 3371 G14 3371 G15
Buck VIN Supply Current PMOS Current Limit vs Temperature VOUT vs Temperature vs Temperature
550 1.88 2.6 FORCED CONTINUOUS MODE V 500 IN = 3.3V 1.86 ILOAD = 0mA 450 2.5 (µA) 400 1.84 350 2.4 1.82 300 (V) 1.80 (A) D 2.3 250 V OUT I FW 200 VIN = 2.25V 1.78 2.2 150 VIN = 3.3V 1.76 I VIN_FORCED_CONTINUOUS V V 100 IN = 5.5V IN = 2.25V 2.1 1.74 VIN = 3.3V 50 FORCED CONTINUOUS MODE FB = 0V VIN = 5.5V 0 1.72 2.0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3371 G16 3371 G17 3371 G18 3371fb For more information www.linear.com/LTC3371 7 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. Oscillator Frequency vs VCC Oscillator Frequency vs RT VTEMP vs Temperature
2.2 4 1400 VCC = 3.3V ILOAD = 0mA 2.15 3.5 1200 VCC = 3.3V 2.1 3 1000 2.05 2.5 800 VRT = VCC (MHz) 2 (MHz) 2 (mV) 600 RT = 400k f OSC ACTUAL VTEMP 1.95 f OSC 1.5 V TEMP 400 1.9 1 200 1.85 0.5 0 IDEAL VTEMP 1.8 0 –200 2.7 3.1 3.5 3.9 4.3 4.7 5.1 5.5 250 300 350 400 450 500 550 600 650 700 750 800 –55 –25 5 35 65 95 125 155 VCC (V) RT (kΩ) TEMPERATURE (°C) 3371 G10 3371 G11 3371 G12
Enable Pin Precision Threshold Buck VIN Supply Current Enable Threshold vs Temperature vs Temperature vs Temperature
900 415 50 ALL REGULATORS DISABLED BURST MODE OPERATION 850 VCC = 3.3V 410 FB = 850mV 800 EN RISING 40 750 405 700 EN RISING 400 30 (µA) 650 395 600 20 550 390 I VIN_BURST EN THRESHOLD (mV) EN FALLING 500 EN THRESHOLD (mV) 385 V 450 10 IN = 2.25V EN FALLING 380 VIN = 3.3V 400 VIN = 5.5V 350 375 0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3371 G13 3371 G14 3371 G15
Buck VIN Supply Current PMOS Current Limit vs Temperature VOUT vs Temperature vs Temperature
550 1.88 2.6 FORCED CONTINUOUS MODE V 500 IN = 3.3V 1.86 ILOAD = 0mA 450 2.5 (µA) 400 1.84 350 2.4 1.82 300 (V) 1.80 (A) D 2.3 250 V OUT I FW 200 VIN = 2.25V 1.78 2.2 150 VIN = 3.3V 1.76 I VIN_FORCED_CONTINUOUS V V 100 IN = 5.5V IN = 2.25V 2.1 1.74 VIN = 3.3V 50 FORCED CONTINUOUS MODE FB = 0V VIN = 5.5V 0 1.72 2.0 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 –55 –25 5 35 65 95 125 155 TEMPERATURE (°C) TEMPERATURE (°C) TEMPERATURE (°C) 3371 G16 3371 G17 3371 G18 3371fb For more information www.linear.com/LTC3371 7 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
