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전자부품 데이터시트 검색엔진 |
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전자부품 데이터시트 검색엔진 |
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LTM4651 데이터시트(PDF) 1 Page - Analog Devices |
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LTM4651 데이터시트(HTML) 1 Page - Analog Devices |
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1 / 54 page  LTM4655 1 Rev. 0 For more information www.analog.com Document Feedback TYPICAL APPLICATION FEATURES DESCRIPTION EN55022B Compliant 40V, Dual 4A or Single 8A Step- Down or 50W Inverting µModule Regulator The LTM®4655 is an ultralow noise 40V, dual 4A or single 8A DC/DC μModule® regulator designed to meet the radi- ated emissions requirements of EN55022. Its channels are fully independent, parallelable and capable of deliver- ing positive or negative output polarity. Conducted emis- sion requirements can be met by adding standard filter components. Included in the package are the switching controllers, power MOSFETs, inductors, filters and sup- port components. A 5V, 25mA LDO and clock generator enable phase interleaving of the power switching stages, for improved EMC performance. The LTM4655 can regulate positive VOUTn+ voltages between 0.5V and 26.5V from a 3.1V to 40V input. The LTM4655 can regulate negative VOUTn– voltages between –0.5V and –26.5V from a maximum input range of 3.6V to 40V, with the span from VINn to VOUTn– not to exceed 40V. A switching frequency range of 250kHz to 3MHz is supported. The LTM4655 is offered in a 16mm × 16mm × 5.01mm BGA package with SnPb or RoHS compliant terminal finish. Concurrent, ±12V Output DC/DC μModule Regulator* APPLICATIONS n Dual 4A/Single 8A Low EMI Switch Mode Power Supply n EN55022 Class B Compliant n Two Fully Independent Channels, Each Configurable for Positive or Negative Output Voltage Polarity n Output Voltage Range: 0.5V ≤ |VOUTn+ – VOUTn–| ≤ 26.5V n Wide Input Voltage Range: Up to 40V n 3.1V or 3.6V Start-Up, Configuration-Dependent n ±1.67% Total DC Output Voltage Error Over Line, Load and Temperature n Analog Output Current Indicator (Positive-VOUT Only) n LDOOUT: 5V Fixed, 25mA Capable LDO n Parallelable with LTM4651/LTM4653 n Constant-Frequency Current Mode Control n Power Good Indicators and Programmable Soft-Start n Overcurrent and Overtemperature Protection n 16mm × 16mm × 5.01mm BGA Package n Automated Test and Measurement n Avionics and Industrial Control Systems n Video, Imaging and Instrumentation All registered trademarks and trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 5705919, 5847554, 6580258. Output Voltage Start-Up Waveforms 4.7 F 4.7 F VIN 13V TO 28V 124k 4.7 F 4.7 F 240k 4655 TA01a LOAD1 22µF ×2 12VOUT UP TO 4A 5VOUT UP TO 25mA CHANNEL 1 ANALOG OUTPUT CURRENT INDICATOR VIMON1 = 0.25 • IOUT1 LOAD2 47µF ×2 IOUT1 IOUT2 * FOR COMPLETE CIRCUIT, SEE FIGURE 50. ** FOR CHANNELS CONFIGURED TO REGULATE NEGATIVE VOUTn−: CURRENT LIMIT FREQUENCY-FOLDBACK INCEPTION IS A FUNCTION OF VINn, VOUTn-, AND fSWn. CONTINUOUS OUTPUT CURRENT CAPABILITY IS SUBJECT TO DETAILS OF APPLICATION IMPLEMENTATION. SEE NOTES 2 AND 3 AND THE APPLICATIONS INFORMATION SECTION, FOR DETAILS. 124k 240k –12VOUT UP TO 2.9A** VIN1 VD1 SVIN1 fSET1 VIN2 SVIN2 VD2 fSET2 ISET1a ISET1b ISET2a ISET2b GND IMON1b IMON1a LDOOUT LTM4655 VOUT1– SVOUT1– VOUT1+ VOSNS1+ VOUT2– SVOUT2– VOUT2+ VOSNS2+ 2ms/DIV VOUT1+ 5V/DIV VOUT2– 5V/DIV PGOOD1,2 5V/DIV RUN1,2 5V/DIV 4655 TA01b |
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