Datasheet LTC3850-2 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | Dual, 2-Phase Synchronous Step-Down Switching Controller |
| 页数 / 页 | 36 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Step. (Burst Mode Operation). … |
| 文件格式/大小 | PDF / 417 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Step. (Burst Mode Operation). (Forced Continuous Mode)
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LTC3850-2
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode)
ILOAD ILOAD 2A/DIV 2A/DIV 200mA TO 2.5A 200mA TO 2.5A IL IL 2A/DIV 2A/DIV V V OUT OUT 100mV/DIV 100mV/DIV AC COUPLED AC COUPLED 38502 G04 38502 G05 40μs/DIV 40μs/DIV CIRCUIT OF FIGURE 14 CIRCUIT OF FIGURE 14 VIN = 12V, VOUT = 1.8V VIN = 12V, VOUT = 1.8V
Load Step (Pulse-Skipping Mode) Inductor Current at Light Load
I FORCED LOAD 2A/DIV CONTINUOUS 200mA TO 2.5A MODE 2A/DIV IL 2A/DIV Burst Mode OPERATION VOUT 2A/DIV 100mV/DIV AC COUPLED PULSE-SKIPPING MODE 2A/DIV 38502 G06 38502 G07 40μs/DIV 1μs/DIV CIRCUIT OF FIGURE 14 CIRCUIT OF FIGURE 14 VIN = 12V, VOUT = 1.8V VIN = 12V, VOUT = 1.8V ILOAD = 100μA
Prebiased Output at 2V Coincident Tracking
RUN1 2V/DIV V V OUT OUT1, 3.3V VTK/SS 2V/DIV 3Ω LOAD, 1V/DIV 500mV/DIV VOUT2, 1.8V VFB 1.5Ω LOAD 500mV/DIV 1V/DIV 38502 G08 38502 G09 2.5ms/DIV 1ms/DIV 38502f 5
TYPICAL PERFORMANCE CHARACTERISTICS Load Step Load Step (Burst Mode Operation) (Forced Continuous Mode)
ILOAD ILOAD 2A/DIV 2A/DIV 200mA TO 2.5A 200mA TO 2.5A IL IL 2A/DIV 2A/DIV V V OUT OUT 100mV/DIV 100mV/DIV AC COUPLED AC COUPLED 38502 G04 38502 G05 40μs/DIV 40μs/DIV CIRCUIT OF FIGURE 14 CIRCUIT OF FIGURE 14 VIN = 12V, VOUT = 1.8V VIN = 12V, VOUT = 1.8V
Load Step (Pulse-Skipping Mode) Inductor Current at Light Load
I FORCED LOAD 2A/DIV CONTINUOUS 200mA TO 2.5A MODE 2A/DIV IL 2A/DIV Burst Mode OPERATION VOUT 2A/DIV 100mV/DIV AC COUPLED PULSE-SKIPPING MODE 2A/DIV 38502 G06 38502 G07 40μs/DIV 1μs/DIV CIRCUIT OF FIGURE 14 CIRCUIT OF FIGURE 14 VIN = 12V, VOUT = 1.8V VIN = 12V, VOUT = 1.8V ILOAD = 100μA
Prebiased Output at 2V Coincident Tracking
RUN1 2V/DIV V V OUT OUT1, 3.3V VTK/SS 2V/DIV 3Ω LOAD, 1V/DIV 500mV/DIV VOUT2, 1.8V VFB 1.5Ω LOAD 500mV/DIV 1V/DIV 38502 G08 38502 G09 2.5ms/DIV 1ms/DIV 38502f 5