Datasheet LTM4638 (Analog Devices) - 6
| 制造商 | Analog Devices |
| 描述 | 20VIN, 15A Step-Down DC/DC µModule Regulator |
| 页数 / 页 | 30 / 6 — TYPICAL PERFORMANCE CHARACTERISTICS. Start-up Waveform with 15A Load. … |
| 修订版 | B |
| 文件格式/大小 | PDF / 2.3 Mb |
| 文件语言 | 英语 |
TYPICAL PERFORMANCE CHARACTERISTICS. Start-up Waveform with 15A Load. Output Short Circuit Waveform. Current
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LTM4638
TYPICAL PERFORMANCE CHARACTERISTICS Start-up Waveform with 15A Load Output Short Circuit Waveform Output Short Circuit Waveform Current without Load Applied with 15A Load Current Applied
RUN 5V/DIV PGOOD IIN IIN 5V/DIV 1A/DIV 1A/DIV VOUT 1V/DIV V I OUT V IN 1V/DIV OUT 2A/DIV 1V/DIV 4638 G10 4638 G11 4638 G12 5ms/DIV 50µs/DIV 50µs/DIV VIN=12V, VOUT=1V, fS=600kHz VIN=12V, VOUT=1.5V, fS=800kHz VIN=12V, VOUT=1.5V, fS=800kHz 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, CSS=0.1µF COMPb, CFF=33pF COMPb, CFF=33pF
Steady-State Output Voltage Start-up into Pre-Biased Output Ripple
RUN 5V/DIV PGOOD 5V/DIV OUTPUT VOLTAGE VOUT 10mV/DIV 2V/DIV AC COUPLED IIN 0.5A/DIV 4638 G13 4638 G14 5ms/DIV 500ns/DIV VIN=12V, VOUT=3.3V, fS=800kHz VIN=12V, VOUT=1.5V, fS=800kHz COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO COMPb, CFF=33pF, PREBIASED OUTPUT TO 1.2V, COMPb, CFF=33pF CSS=0.1µF Rev. B 6 For more information www.analog.com 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 Start-up Waveform with 15A Load Output Short Circuit Waveform Output Short Circuit Waveform Current without Load Applied with 15A Load Current Applied
RUN 5V/DIV PGOOD IIN IIN 5V/DIV 1A/DIV 1A/DIV VOUT 1V/DIV V I OUT V IN 1V/DIV OUT 2A/DIV 1V/DIV 4638 G10 4638 G11 4638 G12 5ms/DIV 50µs/DIV 50µs/DIV VIN=12V, VOUT=1V, fS=600kHz VIN=12V, VOUT=1.5V, fS=800kHz VIN=12V, VOUT=1.5V, fS=800kHz 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, CSS=0.1µF COMPb, CFF=33pF COMPb, CFF=33pF
Steady-State Output Voltage Start-up into Pre-Biased Output Ripple
RUN 5V/DIV PGOOD 5V/DIV OUTPUT VOLTAGE VOUT 10mV/DIV 2V/DIV AC COUPLED IIN 0.5A/DIV 4638 G13 4638 G14 5ms/DIV 500ns/DIV VIN=12V, VOUT=3.3V, fS=800kHz VIN=12V, VOUT=1.5V, fS=800kHz COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR COUT = 3x 100µF + 1x 22µF CERAMIC CAPACITOR INTERNAL COMPENSATION, COMPa CONNECT TO INTERNAL COMPENSATION, COMPa CONNECT TO COMPb, CFF=33pF, PREBIASED OUTPUT TO 1.2V, COMPb, CFF=33pF CSS=0.1µF Rev. B 6 For more information www.analog.com 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