Datasheet LTC3811 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | High Speed Dual, Multiphase Step-Down DC/DC Controller |
| 页数 / 页 | 48 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Load Step (Forced Continuous. Load … |
| 文件格式/大小 | PDF / 552 Kb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Load Step (Forced Continuous. Load Step (Pulse Skip Mode). Load Step (Forced Continuous)
该数据表的模型线
文件文字版本
LTC3811
TYPICAL PERFORMANCE CHARACTERISTICS Load Step (Forced Continuous Load Step (Pulse Skip Mode) Load Step (Forced Continuous) with Voltage Positioning)
VOUT V 50mV/DIV OUT VOUT 50mV/DIV 50mV/DIV AC COUPLED AC COUPLED AC COUPLED IL IL IL1 5A/DIV 5A/DIV 5A/DIV IL2 5A/DIV 20μs/DIV 3811 G01 VIN = 12V 20μs/DIV 3811 G02 VIN = 12V 50μs/DIV 3811 G03 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V (2-PHASE) ILOAD = 0.5A TO 8A ILOAD = 0.5A TO 8A ILOAD = 0A TO 15A
Light Load Waveforms Light Load Waveforms Low Duty Cycle Waveforms (Forced Continuous Mode) (Pulse Skip Mode)
SW SW SW 5V/DIV 5V/DIV 10V/DIV VOUT VOUT 20mV/DIV 20mV/DIV AC COUPLED AC COUPLED IL 2A/DIV I I L L 5A/DIV 5A/DIV 250ns/DIV 3811 G04 V 1μs/DIV 3811 G05 V IN = 20V IN = 12V 1μs/DIV 3811 G06 VIN = 12V V V OUT = 1.2V OUT = 1.5V VOUT = 1.5V I I LOAD = 1.5A LOAD = 300mA ILOAD = 300mA
Effi ciency vs Load Current with Effi ciency vs Load Current with RSENSE = 1.5m
Ω
DCR Sensing Short-Circut Waveforms
100 100 VIN = 12V VIN = 12V 95 VOUT = 2V 95 VOUT = 2V IL 5A/DIV 90 90 85 85 PGOOD 5V/DIV 80 80 VOUT 75 EFFICIENCY (%) 75 EFFICIENCY (%) 1V/DIV 70 70 200μs/DIV 3811 G09 VIN = 12V 65 DISCONTINUOUS 65 DISCONTINUOUS VOUT = 1.5V FORCED CONTINUOUS FORCED CONTINUOUS 60 60 1 10 100 1 10 100 LOAD CURRENT (A) LOAD CURRENT (A) 3811 G07 3811 G08 3811f 6
TYPICAL PERFORMANCE CHARACTERISTICS Load Step (Forced Continuous Load Step (Pulse Skip Mode) Load Step (Forced Continuous) with Voltage Positioning)
VOUT V 50mV/DIV OUT VOUT 50mV/DIV 50mV/DIV AC COUPLED AC COUPLED AC COUPLED IL IL IL1 5A/DIV 5A/DIV 5A/DIV IL2 5A/DIV 20μs/DIV 3811 G01 VIN = 12V 20μs/DIV 3811 G02 VIN = 12V 50μs/DIV 3811 G03 VIN = 12V VOUT = 1.5V VOUT = 1.5V VOUT = 1.5V (2-PHASE) ILOAD = 0.5A TO 8A ILOAD = 0.5A TO 8A ILOAD = 0A TO 15A
Light Load Waveforms Light Load Waveforms Low Duty Cycle Waveforms (Forced Continuous Mode) (Pulse Skip Mode)
SW SW SW 5V/DIV 5V/DIV 10V/DIV VOUT VOUT 20mV/DIV 20mV/DIV AC COUPLED AC COUPLED IL 2A/DIV I I L L 5A/DIV 5A/DIV 250ns/DIV 3811 G04 V 1μs/DIV 3811 G05 V IN = 20V IN = 12V 1μs/DIV 3811 G06 VIN = 12V V V OUT = 1.2V OUT = 1.5V VOUT = 1.5V I I LOAD = 1.5A LOAD = 300mA ILOAD = 300mA
Effi ciency vs Load Current with Effi ciency vs Load Current with RSENSE = 1.5m
Ω
DCR Sensing Short-Circut Waveforms
100 100 VIN = 12V VIN = 12V 95 VOUT = 2V 95 VOUT = 2V IL 5A/DIV 90 90 85 85 PGOOD 5V/DIV 80 80 VOUT 75 EFFICIENCY (%) 75 EFFICIENCY (%) 1V/DIV 70 70 200μs/DIV 3811 G09 VIN = 12V 65 DISCONTINUOUS 65 DISCONTINUOUS VOUT = 1.5V FORCED CONTINUOUS FORCED CONTINUOUS 60 60 1 10 100 1 10 100 LOAD CURRENT (A) LOAD CURRENT (A) 3811 G07 3811 G08 3811f 6