Datasheet LTC3370 (Analog Devices) - 10
| Manufacturer | Analog Devices |
| Description | 4-Channel 8A Configurable Buck DC/DCs |
| Pages / Page | 24 / 10 — Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. 1A … |
| File Format / Size | PDF / 810 Kb |
| Document Language | English |
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. 1A Buck Efficiency vs Frequency
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LTC3370
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. 1A Buck Efficiency vs Frequency 1A Buck Regulator Load Regulation 4A Buck Regulator Load Regulation (Forced Continuous Mode) (Forced Continuous Mode) (Forced Continuous Mode)
100 1.820 1.820 ILOAD = 100mA 90 1.816 1.816 80 ILOAD = 500mA 1.812 1.812 70 ILOAD = 20mA 1.808 V 1.808 IN = 3.3V VIN = 5.5V 60 1.804 VIN = 5.5V 1.804 (V) (V) V 50 1.800 1.800 IN = 3.3V 40 V OUT 1.796 V OUT V 1.796 VIN = 2.25V EFFICIENCY (%) IN = 2.25V 30 1.792 1.792 DROPOUT 20 1.788 1.788 VOUT = 1.8V DROPOUT 10 VIN = 3.3V 1.784 fOSC = 2MHz 1.784 fOSC = 2MHz L = 3.3µH L = 2.2µH L = 2.2µH 0 1.780 1.780 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 1 10 100 1000 1 10 100 1000 FREQUENCY (MHz) LOAD CURRENT (mA) LOAD CURRENT (mA) 3370 G37 3370 G38 3370 G39
1A Buck Regulator Line Regulation 1A Buck Regulator No-Load Start-Up 1A Buck Regulator No-Load Start-Up (Forced Continuous Mode) Transient(Burst Mode Operation) Transient (Forced Continuous Mode)
1.820 VIN = 3.3V VIN = 3.3V 1.815 VOUT = 1.8V VOUT = 1.8V 1.810 V V 1.805 OUT OUT 500mV/DIV 500mV/DIV I (V) LOAD = 100mA 1.800 INDUCTOR INDUCTOR V OUT CURRENT CURRENT 1.795 ILOAD = 500mA 500mA/DIV 500mA/DIV 1.790 EN EN 2V/DIV 2V/DIV 3370 G41 3370 G42 1.785 f 200µs/DIV 200µs/DIV OSC = 2MHz L = 2.2µH 1.7802.25 2.75 3.25 3.75 4.25 4.75 5.25 VIN (V) 3370 G40
4A Buck Regulator No-Load Start-Up 4A Buck Regulator No-Load Start-Up 1A Buck Regulator Transient Transient (Burst Mode Operation) Transient (Forced Continuous Mode) Response (Burst Mode Operation)
VIN = 3.3V VIN = 3.3V V V OUT OUT = 1.8V VOUT = 1.8V 100mV/DIV VOUT AC-COUPLED 500mV/DIV VOUT 500mV/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 500mA/DIV 500mA/DIV 200mA/DIV EN EN 0mA 2V/DIV 2V/DIV 3370 G43 3370 G44 3370 G45 200µs/DIV 200µs/DIV 50µs/DIV LOAD STEP = 100mA TO 700mA VIN = 3.3V VOUT = 1.8V 3370fb 10 For more information www.linear.com/LTC3370 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Block Diagram Operation Buck Switching Regulators Buck Regulators with Combined Power Stages Power Failure Reporting Via PGOODALL Pin Temperature Monitoring and Overtemperature Protection Programming the Operating Frequency 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 Typical Application Related Parts
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. 1A Buck Efficiency vs Frequency 1A Buck Regulator Load Regulation 4A Buck Regulator Load Regulation (Forced Continuous Mode) (Forced Continuous Mode) (Forced Continuous Mode)
100 1.820 1.820 ILOAD = 100mA 90 1.816 1.816 80 ILOAD = 500mA 1.812 1.812 70 ILOAD = 20mA 1.808 V 1.808 IN = 3.3V VIN = 5.5V 60 1.804 VIN = 5.5V 1.804 (V) (V) V 50 1.800 1.800 IN = 3.3V 40 V OUT 1.796 V OUT V 1.796 VIN = 2.25V EFFICIENCY (%) IN = 2.25V 30 1.792 1.792 DROPOUT 20 1.788 1.788 VOUT = 1.8V DROPOUT 10 VIN = 3.3V 1.784 fOSC = 2MHz 1.784 fOSC = 2MHz L = 3.3µH L = 2.2µH L = 2.2µH 0 1.780 1.780 1 1.2 1.4 1.6 1.8 2 2.2 2.4 2.6 2.8 3 1 10 100 1000 1 10 100 1000 FREQUENCY (MHz) LOAD CURRENT (mA) LOAD CURRENT (mA) 3370 G37 3370 G38 3370 G39
1A Buck Regulator Line Regulation 1A Buck Regulator No-Load Start-Up 1A Buck Regulator No-Load Start-Up (Forced Continuous Mode) Transient(Burst Mode Operation) Transient (Forced Continuous Mode)
1.820 VIN = 3.3V VIN = 3.3V 1.815 VOUT = 1.8V VOUT = 1.8V 1.810 V V 1.805 OUT OUT 500mV/DIV 500mV/DIV I (V) LOAD = 100mA 1.800 INDUCTOR INDUCTOR V OUT CURRENT CURRENT 1.795 ILOAD = 500mA 500mA/DIV 500mA/DIV 1.790 EN EN 2V/DIV 2V/DIV 3370 G41 3370 G42 1.785 f 200µs/DIV 200µs/DIV OSC = 2MHz L = 2.2µH 1.7802.25 2.75 3.25 3.75 4.25 4.75 5.25 VIN (V) 3370 G40
4A Buck Regulator No-Load Start-Up 4A Buck Regulator No-Load Start-Up 1A Buck Regulator Transient Transient (Burst Mode Operation) Transient (Forced Continuous Mode) Response (Burst Mode Operation)
VIN = 3.3V VIN = 3.3V V V OUT OUT = 1.8V VOUT = 1.8V 100mV/DIV VOUT AC-COUPLED 500mV/DIV VOUT 500mV/DIV INDUCTOR INDUCTOR INDUCTOR CURRENT CURRENT CURRENT 500mA/DIV 500mA/DIV 200mA/DIV EN EN 0mA 2V/DIV 2V/DIV 3370 G43 3370 G44 3370 G45 200µs/DIV 200µs/DIV 50µs/DIV LOAD STEP = 100mA TO 700mA VIN = 3.3V VOUT = 1.8V 3370fb 10 For more information www.linear.com/LTC3370 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Block Diagram Operation Buck Switching Regulators Buck Regulators with Combined Power Stages Power Failure Reporting Via PGOODALL Pin Temperature Monitoring and Overtemperature Protection Programming the Operating Frequency 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 Typical Application Related Parts
