Datasheet LTC3802 (Analog Devices) - 7
| Fabricante | Analog Devices |
| Descripción | Dual 550kHz Synchronous 2-Phase DC/DC Controller with Programmable Up/Down Tracking |
| Páginas / Página | 28 / 7 — TYPICAL PERFOR A CE CHARACTERISTICS. Maximum Duty Cycle. Switching … |
| Formato / tamaño de archivo | PDF / 359 Kb |
| Idioma del documento | Inglés |
TYPICAL PERFOR A CE CHARACTERISTICS. Maximum Duty Cycle. Switching Frequency vs VPLLLPF. Continuous Mode Operation
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LTC3802
W U TYPICAL PERFOR A CE CHARACTERISTICS Maximum Duty Cycle Switching Frequency vs VPLLLPF Continuous Mode Operation vs Temperature
850 100 T VOUT1 A = 25°C VCC = 5V V 5V CC = 5V 95 fSW = 550kHz 750 AC 20mV/DIV 90 650 TG1 VCMPIN > 0.54V 20V/DIV 85 550 80 VOUT2 75 450 1V VCMPIN < 0.54V AC 20mV/DIV 70 MAXIMUM DUTY CYCLE (%) SWITCHING FREQUENCY (kHz) 350 TG2 65 20V/DIV 250 60 0 0.4 0.8 1.2 1.6 2 2.4 V 0.5 3802 G18 IN = 30V µs/DIV – 50 – 25 0 25 50 75 100 125 VPLLLPF (V) TEMPERATURE (°C) 3802 G17 3802 G19
Maximum Duty Cycle Maximum Duty Cycle vs VCC Supply Voltage vs Switching Frequency Duty Cycle vs VCOMP
100 100 100 TA = 25°C TA = 25°C 90 95 fSW = 550kHz 95 VCC = 5V VIN = 5V 80 90 90 V V IN = 12V IN = 30V V 70 CMPIN > 0.54V V 85 CMPIN > 0.54V V 85 IN = 20V 60 80 80 50 VCMPIN < 0.54V 40 75 75 DUTY CYCLE (%) VCMPIN < 0.54V 30 70 70 MAXIMUM DUTY CYCLE (%) MAXIMUM DUTY CYCLE (%) 20 TA = 25°C 65 65 10 VCC = 5V VCMPIN = VFB 0 60 0 3 3.5 4 4.5 5 5.5 6 330 390 450 510 570 630 690 750 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 VCC SUPPLY VOLTAGE (V) SWITCHING FREQUENCY (kHz) VCOMP (V) 3802 G20 3802 G21 3802 G22
IIMAX and IRUN/SS vs Temperature IIMAX vs VCC Supply Voltage Driver Supply Current vs Load
12.0 20 11.5 80 VCC = 5V TA = 25°C TA = 25°C 11.5 15 PVCC = VBOOST – VSW = 5V IRUN/SS 10.9 11.0 SINK CURRENT 10 60 I IPVCC RUN/SS 10.5 5 µA) I 10.3 IMAX µA) ( 10.0 0 ( 40 µ I IMAX A) I IMAX 9.5 –5 9.7 IBOOST1 IBOOST2 9.0 IRUN/SS –10 20 SOURCE CURRENT 9.1 DRIVER SUPPLY CURRENT (mA) 8.5 –15 8.0 –20 8.5 0 – 50 – 25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 0 2000 4000 6000 8000 10000 TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) CTG, CBG LOAD (pF) 3802 G23 3802 G24 3802 G25 3802f 7
W U TYPICAL PERFOR A CE CHARACTERISTICS Maximum Duty Cycle Switching Frequency vs VPLLLPF Continuous Mode Operation vs Temperature
850 100 T VOUT1 A = 25°C VCC = 5V V 5V CC = 5V 95 fSW = 550kHz 750 AC 20mV/DIV 90 650 TG1 VCMPIN > 0.54V 20V/DIV 85 550 80 VOUT2 75 450 1V VCMPIN < 0.54V AC 20mV/DIV 70 MAXIMUM DUTY CYCLE (%) SWITCHING FREQUENCY (kHz) 350 TG2 65 20V/DIV 250 60 0 0.4 0.8 1.2 1.6 2 2.4 V 0.5 3802 G18 IN = 30V µs/DIV – 50 – 25 0 25 50 75 100 125 VPLLLPF (V) TEMPERATURE (°C) 3802 G17 3802 G19
Maximum Duty Cycle Maximum Duty Cycle vs VCC Supply Voltage vs Switching Frequency Duty Cycle vs VCOMP
100 100 100 TA = 25°C TA = 25°C 90 95 fSW = 550kHz 95 VCC = 5V VIN = 5V 80 90 90 V V IN = 12V IN = 30V V 70 CMPIN > 0.54V V 85 CMPIN > 0.54V V 85 IN = 20V 60 80 80 50 VCMPIN < 0.54V 40 75 75 DUTY CYCLE (%) VCMPIN < 0.54V 30 70 70 MAXIMUM DUTY CYCLE (%) MAXIMUM DUTY CYCLE (%) 20 TA = 25°C 65 65 10 VCC = 5V VCMPIN = VFB 0 60 0 3 3.5 4 4.5 5 5.5 6 330 390 450 510 570 630 690 750 0.8 1 1.2 1.4 1.6 1.8 2 2.2 2.4 VCC SUPPLY VOLTAGE (V) SWITCHING FREQUENCY (kHz) VCOMP (V) 3802 G20 3802 G21 3802 G22
IIMAX and IRUN/SS vs Temperature IIMAX vs VCC Supply Voltage Driver Supply Current vs Load
12.0 20 11.5 80 VCC = 5V TA = 25°C TA = 25°C 11.5 15 PVCC = VBOOST – VSW = 5V IRUN/SS 10.9 11.0 SINK CURRENT 10 60 I IPVCC RUN/SS 10.5 5 µA) I 10.3 IMAX µA) ( 10.0 0 ( 40 µ I IMAX A) I IMAX 9.5 –5 9.7 IBOOST1 IBOOST2 9.0 IRUN/SS –10 20 SOURCE CURRENT 9.1 DRIVER SUPPLY CURRENT (mA) 8.5 –15 8.0 –20 8.5 0 – 50 – 25 0 25 50 75 100 125 3 3.5 4 4.5 5 5.5 6 0 2000 4000 6000 8000 10000 TEMPERATURE (°C) VCC SUPPLY VOLTAGE (V) CTG, CBG LOAD (pF) 3802 G23 3802 G24 3802 G25 3802f 7