Datasheet LTC3649 (Analog Devices) - 5
| Manufacturer | Analog Devices |
| Description | 60V, 4A Synchronous Step-Down Regulator with Rail-to-Rail Programmable Output |
| Pages / Page | 26 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. … |
| File Format / Size | PDF / 507 Kb |
| Document Language | English |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. RDS(ON) vs Temperature. Transient Response, CCM
Text Version of Document
LTC3649
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. RDS(ON) vs Temperature Transient Response, CCM Transient Response, Burst Mode
200 160 V V MTOP OUT OUT 100mV/DIV 100mV/DIV 120 AC-COUPLED AC-COUPLED (mΩ) R DSON 80 MBOT IL IL 2A/DIV 2A/DIV 40 3649 G08 20µs/DIV 3649 G09 20µs/DIV VIN = 24V, VOUT = 5V VIN = 24V, VOUT = 5V 0 I I –55 –35 –15 5 25 45 65 85 105 125 OUT = 0A TO 4A, L = 2.2µH, fSW = 1MHz OUT = 0.2A TO 4A, L = 2.2µH, fSW = 1MHz RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF TEMPERATURE (°C) FC MODE, COUT = 2× 47µF BURST MODE, COUT = 2× 47µF 3649 G07
Switching Frequency/Period Switching Frequency vs RT vs Temperature Output Regulation with VIN Slew
3.0 3500 1010 2.5 3000 1005 IL FREQUENCY 1A/DIV 2500 2.0 PERIOD (ns) PERIOD 1000 2000 VOUT 1.5 2V/DIV 1500 995 FREQUENCY (MHz) 1.0 FREQUENCY (kHz) VIN 1000 50V/DIV 990 0.5 500 3649 G12 10ms/DIV VIN = 12V TO 60V, VOUT = 5V 0 0 985 IOUT = 0A, L = 2.2µH, fSW = 2.25MHz 0 50 100 150 200 250 300 350 –55 –35 –15 5 25 45 65 85 105 125 RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF RT RESISTOR (kΩ) TEMPERATURE (°C) FC MODE, COUT = 2× 47µF 3649 G10 3649 G11
Continuous Conduction Mode Run Rising Threshold Burst Mode Operation Operation vs Temperature
1.210 IL IL 1.205 1A/DIV 1A/DIV 1.200 1.195 SW SW 10V/DIV 10V/DIV 1.190 RUN RISING THRESHOLD (V) 1.185 3649 G13 2µs/DIV 3649 G14 500ns/DIV VIN = 24V, VOUT = 5V VIN = 24V, VOUT = 5V IOUT = 100mA, L = 2.2µH, fSW = 1MHz IOUT = 0A, L = 2.2µH, fSW = 1MHz 1.180 RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF –55 –35 –15 5 25 45 65 85 105 125 BURST MODE, COUT = 2× 47µF FC MODE, COUT = 2× 47µF TEMPERATURE (°C) 3649 G15 3649fb For more information www.linear.com/LTC3649 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, unless otherwise noted. RDS(ON) vs Temperature Transient Response, CCM Transient Response, Burst Mode
200 160 V V MTOP OUT OUT 100mV/DIV 100mV/DIV 120 AC-COUPLED AC-COUPLED (mΩ) R DSON 80 MBOT IL IL 2A/DIV 2A/DIV 40 3649 G08 20µs/DIV 3649 G09 20µs/DIV VIN = 24V, VOUT = 5V VIN = 24V, VOUT = 5V 0 I I –55 –35 –15 5 25 45 65 85 105 125 OUT = 0A TO 4A, L = 2.2µH, fSW = 1MHz OUT = 0.2A TO 4A, L = 2.2µH, fSW = 1MHz RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF TEMPERATURE (°C) FC MODE, COUT = 2× 47µF BURST MODE, COUT = 2× 47µF 3649 G07
Switching Frequency/Period Switching Frequency vs RT vs Temperature Output Regulation with VIN Slew
3.0 3500 1010 2.5 3000 1005 IL FREQUENCY 1A/DIV 2500 2.0 PERIOD (ns) PERIOD 1000 2000 VOUT 1.5 2V/DIV 1500 995 FREQUENCY (MHz) 1.0 FREQUENCY (kHz) VIN 1000 50V/DIV 990 0.5 500 3649 G12 10ms/DIV VIN = 12V TO 60V, VOUT = 5V 0 0 985 IOUT = 0A, L = 2.2µH, fSW = 2.25MHz 0 50 100 150 200 250 300 350 –55 –35 –15 5 25 45 65 85 105 125 RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF RT RESISTOR (kΩ) TEMPERATURE (°C) FC MODE, COUT = 2× 47µF 3649 G10 3649 G11
Continuous Conduction Mode Run Rising Threshold Burst Mode Operation Operation vs Temperature
1.210 IL IL 1.205 1A/DIV 1A/DIV 1.200 1.195 SW SW 10V/DIV 10V/DIV 1.190 RUN RISING THRESHOLD (V) 1.185 3649 G13 2µs/DIV 3649 G14 500ns/DIV VIN = 24V, VOUT = 5V VIN = 24V, VOUT = 5V IOUT = 100mA, L = 2.2µH, fSW = 1MHz IOUT = 0A, L = 2.2µH, fSW = 1MHz 1.180 RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF RITH = 4kΩ, CITH = 2.2nF, CITHP = 47pF –55 –35 –15 5 25 45 65 85 105 125 BURST MODE, COUT = 2× 47µF FC MODE, COUT = 2× 47µF TEMPERATURE (°C) 3649 G15 3649fb For more information www.linear.com/LTC3649 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Pin Configuration Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Functional Diagram Operation Applications Information Typical Applications Package Description Revision History Typical Application Related Parts
