Datasheet LTM4638 (Analog Devices) - 5
| 制造商 | Analog Devices |
| 描述 | 20VIN, 15A Step-Down DC/DC µModule Regulator |
| 页数 / 页 | 30 / 5 — TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. from … |
| 修订版 | B |
| 文件格式/大小 | PDF / 2.3 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Efficiency vs Load Current. from 3.3VIN. from 5VIN. from 12VIN. 1V Output Transient Response
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LTM4638
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Load Current Efficiency vs Load Current from 3.3VIN from 5VIN from 12VIN
100 100 100 95 95 95 90 90 90 85 85 85 1.0VOUT, 600kHz EFFICIENCY (%) 1.2V 80 EFFICIENCY (%) 1.0VOUT, 600kHz EFFICIENCY (%) OUT, 600kHz 1.0V 80 80 OUT, 500kHz 1.2VOUT, 600kHz 1.5VOUT, 800kHz 1.2VOUT, 500kHz 1.5VOUT, 600kHz 1.8VOUT, 800kHz 75 1.5VOUT, 500kHz 75 1.8VOUT, 800kHz 75 2.5VOUT, 1000kHz 1.8VOUT, 500kHz 2.5VOUT, 800kHz 3.3VOUT, 1000kHz 2.5VOUT, 500kHz 3.3VOUT, 800kHz 5.0VOUT, 1500kHz 70 70 70 0 5 10 15 0 5 10 15 0 5 10 15 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4638 G01 4638 G02 4638 G03
1V Output Transient Response 1.5V Output Transient Response 2.5V Output Transient Response
OUTPUT OUTPUT OUTPUT VOLTAGE VOLTAGE VOLTAGE 50mV/DIV 50mV/DIV 100mV/DIV AC COUPLED AC COUPLED AC COUPLED LOAD STEP LOAD STEP LOAD STEP CURRENT CURRENT CURRENT 2A/DIV 2A/DIV 2A/DIV 4638 G04 100µs/DIV 4638 G05 4638 G06 100µs/DIV 100µs/DIV VIN=12V, VOUT=1.0V, fS=600kHz VIN=12V, VOUT=1.5V, fS=800kHz VIN=12V, VOUT=2.5V, fS=1000kHz COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPb CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO COMPb, CFF=33pF COMPb, CFF=33pF COMPb, CFF=33pF
Start-up Waveform Without 3.3V Output Transient Response 5V Output Transient Response Load Current
RUN OUTPUT OUTPUT 5V/DIV VOLTAGE VOLTAGE PGOOD 100mV/DIV 200mV/DIV 5V/DIV AC COUPLED AC COUPLED VOUT 1V/DIV LOAD STEP LOAD STEP CURRENT CURRENT 2A/DIV 2A/DIV IIN 0.5A/DIV 4638 G07 4638 G08 4638 G09 100µs/DIV 100µs/DIV 5ms/DIV VIN=12V, VOUT=3.3V, fS=1000kHz VIN=12V, VOUT=5V, fS=1500kHz VIN=12V, VOUT=1V, fS=600kHz COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO COMPb, CFF=33pF COMPb, CFF=33pF COMPb, CFF=33pF, CSS=0.1µF Rev. B For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Revision History Package Photo Related Parts
TYPICAL PERFORMANCE CHARACTERISTICS Efficiency vs Load Current Efficiency vs Load Current Efficiency vs Load Current from 3.3VIN from 5VIN from 12VIN
100 100 100 95 95 95 90 90 90 85 85 85 1.0VOUT, 600kHz EFFICIENCY (%) 1.2V 80 EFFICIENCY (%) 1.0VOUT, 600kHz EFFICIENCY (%) OUT, 600kHz 1.0V 80 80 OUT, 500kHz 1.2VOUT, 600kHz 1.5VOUT, 800kHz 1.2VOUT, 500kHz 1.5VOUT, 600kHz 1.8VOUT, 800kHz 75 1.5VOUT, 500kHz 75 1.8VOUT, 800kHz 75 2.5VOUT, 1000kHz 1.8VOUT, 500kHz 2.5VOUT, 800kHz 3.3VOUT, 1000kHz 2.5VOUT, 500kHz 3.3VOUT, 800kHz 5.0VOUT, 1500kHz 70 70 70 0 5 10 15 0 5 10 15 0 5 10 15 LOAD CURRENT (A) LOAD CURRENT (A) LOAD CURRENT (A) 4638 G01 4638 G02 4638 G03
1V Output Transient Response 1.5V Output Transient Response 2.5V Output Transient Response
OUTPUT OUTPUT OUTPUT VOLTAGE VOLTAGE VOLTAGE 50mV/DIV 50mV/DIV 100mV/DIV AC COUPLED AC COUPLED AC COUPLED LOAD STEP LOAD STEP LOAD STEP CURRENT CURRENT CURRENT 2A/DIV 2A/DIV 2A/DIV 4638 G04 100µs/DIV 4638 G05 4638 G06 100µs/DIV 100µs/DIV VIN=12V, VOUT=1.0V, fS=600kHz VIN=12V, VOUT=1.5V, fS=800kHz VIN=12V, VOUT=2.5V, fS=1000kHz COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPb CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO COMPb, CFF=33pF COMPb, CFF=33pF COMPb, CFF=33pF
Start-up Waveform Without 3.3V Output Transient Response 5V Output Transient Response Load Current
RUN OUTPUT OUTPUT 5V/DIV VOLTAGE VOLTAGE PGOOD 100mV/DIV 200mV/DIV 5V/DIV AC COUPLED AC COUPLED VOUT 1V/DIV LOAD STEP LOAD STEP CURRENT CURRENT 2A/DIV 2A/DIV IIN 0.5A/DIV 4638 G07 4638 G08 4638 G09 100µs/DIV 100µs/DIV 5ms/DIV VIN=12V, VOUT=3.3V, fS=1000kHz VIN=12V, VOUT=5V, fS=1500kHz VIN=12V, VOUT=1V, fS=600kHz COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO COMPb, CFF=33pF COMPb, CFF=33pF COMPb, CFF=33pF, CSS=0.1µF Rev. B For more information www.analog.com 5 Document Outline Features Applications Typical Application Description Absolute Maximum Ratings Order Information Pin Configuration Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Decoupling Requirements Operation Applications Information Package Description Revision History Package Photo Related Parts