Datasheet LTC3606B (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 800mA Synchronous Step-Down DC/DC with Average Input Current Limit |
| 页数 / 页 | 20 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise … |
| 文件格式/大小 | PDF / 354 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise noted. Effi ciency vs Load Current
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LTC3606B
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise noted. Effi ciency vs Load Current Load Regulation Line Regulation
100 3.0 0.6 VOUT = 1.2V VOUT = 1.8V 90 2.5 ILOAD = 100mA 0.4 80 2.0 70 0.2 60 1.5 50 1.0 0 ERROR (%) ERROR (%) 40 EFFICIENCY (%) OUT 0.5 OUT V V –0.2 30 V 0 20 IN = 2.7V VIN = 3.6V V –0.4 OUT = 1.8V 10 VIN = 4.2V –0.5 VOUT = 2.5V VIN = 5V VOUT = 3.3V 0 –1.0 –0.6 0.0001 0.001 0.01 0.1 1 0 100 200 300 400 500 600 700 800 2.5 3.0 3.5 4.0 4.5 5.0 5.5 OUTPUT CURRENT (A) LOAD CURRENT (mA) VIN (V) 3606B G13 3606B G15 3606B G16
Start-Up from Shutdown Start-Up from Shutdown VRLIM vs Input Current
1.2 ILIM = 475mA RUN RUN RLIM = 116k 2V/DIV 2V/DIV 1.0 VOUT 2V/DIV 0.8 VOUT R (V) LIM 1V/DIV 0.6 1V/DIV RLIMV IL I 0.4 250mA/DIV IN 500mA/DIV 0.2 3606B G17 200μs/DIV 3606B G18 2ms/DIV VIN = 5V, VOUT = 3.3V VIN = 5V, VOUT = 3.4V RLOAD = 7Ω R 0 L = NO LOAD, CL = 4.4mF C 0 100 200 300 400 500 600 LOAD = 4.7μF CLIM = 2200pF, ILIM = 500mA IIN (mA) 3606B G18b
Average Input Current Limit vs Temperature Load Step Load Step
8 VIN = 5V VOUT 6 ILIM = 475mA 200mV/DIV VOUT AC-COUPLED 200mV/DIV 4 AC-COUPLED 2 I I L L 0 1A/DIV 1A/DIV ERROR (%) –2 I INLIM I I LOAD LOAD 1A/DIV 1A/DIV –4 –6 20μs/DIV 3606B G20 20μs/DIV 3606B G21 VIN = 5V, VOUT = 3.3V VIN = 5V, VOUT = 1.8V –8 ILOAD = 0A TO 800mA ILOAD = 80mA TO 800mA –50 –25 0 25 50 75 100 125 COUT = 100μF, CF = 20pF COUT = 100μF, CF = 20pF TEMPERATURE (°C) 3606B G19 3606bfb 5
TYPICAL PERFORMANCE CHARACTERISTICS TA = 25°C, VIN = 5V, unless otherwise noted. Effi ciency vs Load Current Load Regulation Line Regulation
100 3.0 0.6 VOUT = 1.2V VOUT = 1.8V 90 2.5 ILOAD = 100mA 0.4 80 2.0 70 0.2 60 1.5 50 1.0 0 ERROR (%) ERROR (%) 40 EFFICIENCY (%) OUT 0.5 OUT V V –0.2 30 V 0 20 IN = 2.7V VIN = 3.6V V –0.4 OUT = 1.8V 10 VIN = 4.2V –0.5 VOUT = 2.5V VIN = 5V VOUT = 3.3V 0 –1.0 –0.6 0.0001 0.001 0.01 0.1 1 0 100 200 300 400 500 600 700 800 2.5 3.0 3.5 4.0 4.5 5.0 5.5 OUTPUT CURRENT (A) LOAD CURRENT (mA) VIN (V) 3606B G13 3606B G15 3606B G16
Start-Up from Shutdown Start-Up from Shutdown VRLIM vs Input Current
1.2 ILIM = 475mA RUN RUN RLIM = 116k 2V/DIV 2V/DIV 1.0 VOUT 2V/DIV 0.8 VOUT R (V) LIM 1V/DIV 0.6 1V/DIV RLIMV IL I 0.4 250mA/DIV IN 500mA/DIV 0.2 3606B G17 200μs/DIV 3606B G18 2ms/DIV VIN = 5V, VOUT = 3.3V VIN = 5V, VOUT = 3.4V RLOAD = 7Ω R 0 L = NO LOAD, CL = 4.4mF C 0 100 200 300 400 500 600 LOAD = 4.7μF CLIM = 2200pF, ILIM = 500mA IIN (mA) 3606B G18b
Average Input Current Limit vs Temperature Load Step Load Step
8 VIN = 5V VOUT 6 ILIM = 475mA 200mV/DIV VOUT AC-COUPLED 200mV/DIV 4 AC-COUPLED 2 I I L L 0 1A/DIV 1A/DIV ERROR (%) –2 I INLIM I I LOAD LOAD 1A/DIV 1A/DIV –4 –6 20μs/DIV 3606B G20 20μs/DIV 3606B G21 VIN = 5V, VOUT = 3.3V VIN = 5V, VOUT = 1.8V –8 ILOAD = 0A TO 800mA ILOAD = 80mA TO 800mA –50 –25 0 25 50 75 100 125 COUT = 100μF, CF = 20pF COUT = 100μF, CF = 20pF TEMPERATURE (°C) 3606B G19 3606bfb 5