PDF《Ultralow EMI 28VIN, 6A》

1 For more information www.

linear.com/LTM4606 Typical Application Features Description Ultralow EMI 28VIN, 6A DC/DC ?Module Regulator The LTM?

4606 is a complete EN55022 Class B certified noisehighvoltage6AswitchingmodeDC/DCpowersupply. Includedinthepackagearetheswitchingcontroller,power FETs,inductor,andallsupportcomponents.Theon-board inputfilterandnoisecancellationcircuitsachievelownoise operation, thus effectively reducing the electromagnetic interference (EMI). Operating over an input voltage range of 4.5V to 28V, the LTM4606 supports an output voltage range of 0.6V to 5V, set by a single resistor. This high ef- ficiency design delivers 6A continuous current (8A peak). Only bulk input and output capacitors are needed to finish the design. Highswitchingfrequencyandanadaptiveon-timecurrent mode architecture enables a very fast transient response to line and load changes without sacrificing stability. The device supports output voltage tracking and output volt- age margining. Furthermore,the?Module? regulatorcanbesynchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase? operation for high load currents. The LTM4606 is offered in space saving 15mm * 15mm * 2.82mm LGA and 15mm * 15mm * 3.42mm BGA pack- ages. The LTM4606 is available with SnPb (BGA) or RoHS compliant terminal finish. Applications n Complete Low EMI Switch Mode Power Supply n Wide Input Voltage Range: 4.5V to 28V n 6A DC Typical, 8A Peak Output Current n 0.6V to 5V Output Voltage Range n EN55022 Class B Certified n Output Voltage Tracking and Margining n PLL Frequency Synchronization n ±1.75% Total DC Error n Power Good Output n Current Foldback Protection (Disabled at Start-Up) n Parallel/Current Sharing n Current Mode Control n Up to 93% Efficiency at 5VIN, 3.3VOUT n Programmable Soft-Start n Output Overvoltage Protection n C55°C to 125°C Operating Temperature Range (LTM4606MP) n SnPb or RoHS Compliant Finish n 15mm * 15mm * 2.82mm LGA Package 15mm * 15mm * 3.42mm BGA Package n ASICs or FPGA Transceivers n Telecom, Servers and Networking Equipment n Industrial Equipment n RF Equipment L, LT, LTC, LTM, ?Module, PolyPhase, Linear Technology, the Linear logo are registered trademarks and UltraFast and LTpowerCAD are trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents including 5481178, 5847554, 6304066, 6476589, 6580258, 6677210, 6774611, 8163643. Ultralow Noise 2.5V/6A Power Supply with 4.5V to 28V Input Radiated Emission Scan at 12VIN, 2.5VOUT/6A PGOOD RUN COMP INTVCC DRVCC fSET TRACK/SS VD FCB MARG0 MARG1 MPGM VOUT VFB VIN TRACK/SS CONTROL 47pF COUT 2.5V AT 6A CIN 10?F 35V CERAMIC x2 4.5V TO 28V PLLIN CLOCK SYNC ON/OFF LTM4606 SGND PGND MARGIN CONTROL RFB 19.1k 392k 5% MARGIN

4606 TA01a 10?F 35V FREQUENCY (MHz)

30 128.1 226.2 324.3 520.5 422.4 618.6 716.7 814.8 912.9

1010 4606 TA01b SIGNAL AMPLITUDE (dB?V/m)

50 40

30 20

10 0 C10 C20 C30

2 For more information www.linear.com/LTM4606 Pin Configuration Absolute Maximum Ratings (Note 1) DRVCC, VOUT.0.3V to 6V PLLIN, FCB, TRACK/SS, MPGM, MARG0, MARG1, PGOOD, RUN 0.3V to INTVCC + 0.3V VFB, COMP.0.3V to 2.7V VIN, VD.0.3V to 28V BGA PACKAGE 133-LEAD (15mm * 15mm * 3.42mm) TOP VIEW MARG1 DRVCC VFB PGOOD SGND NC NC NC FCB VD fSET MARG0 VIN BANK

1 VOUT BANK

3 PGND BANK

2 RUN COMP MPGM PLLIN INTV CC TRACK/SS SGND TJMAX = 125°C, θJA = 15°C/W, θJCbottom = 6°C/W, θJCtop = 16°C/W θJA DERIVED FROM 95mm * 76mm PCB WITH

4 LAYERS WEIGHT = 1.9g LGA PACKAGE 133-LEAD (15mm * 15mm * 2.82mm) TOP VIEW MARG1 DRVCC VFB PGOOD SGND NC NC NC FCB VIN BANK