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LTM4603 Dataheets PDF



Part Number LTM4603
Manufacturers Linear Technology
Logo Linear Technology
Description 6A DC/DC uModule Regulator
Datasheet LTM4603 DatasheetLTM4603 Datasheet (PDF)

Features n Complete Switch Mode Power Supply n Wide Input Voltage Range: 4.5V to 20V n 6A DC Typical, 8A Peak Output Current n 0.6V to 5V Output Voltage n Output Voltage Tracking and Margining n Remote Sensing for Precision Regulation (LTM4603 Only) n Typical Operating Frequency: 1MHz n PLL Frequency Synchronization n 1.5% Regulation n Current Foldback Protection (Disabled at Start-Up) n Pin Compatible with the LTM4601 n Pb-Free (e4) RoHS Compliant Package with Gold Finish Pads n Ul.

  LTM4603   LTM4603



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Features n Complete Switch Mode Power Supply n Wide Input Voltage Range: 4.5V to 20V n 6A DC Typical, 8A Peak Output Current n 0.6V to 5V Output Voltage n Output Voltage Tracking and Margining n Remote Sensing for Precision Regulation (LTM4603 Only) n Typical Operating Frequency: 1MHz n PLL Frequency Synchronization n 1.5% Regulation n Current Foldback Protection (Disabled at Start-Up) n Pin Compatible with the LTM4601 n Pb-Free (e4) RoHS Compliant Package with Gold Finish Pads n Ultrafast Transient Response n Current Mode Control n Up to 93% Efficiency at 5VIN, 3.3VOUT n Programmable Soft-Start n Output Overvoltage Protection n Small Footprint, Low Profile (15mm × 15mm × 2.82mm) Surface Mount LGA Package Applications n Telecom and Networking Equipment n Servers n Industrial Equipment n Point of Load Regulation LTM4603/LTM4603-1 20V, 6A DC/DC µModule Regulator with PLL, Output Tracking and Margining Description The LTM®4603 is a complete 6A step-down switch mode DC/DC µModule® regulator with onboard switching controller, MOSFETs, inductor and all support components. The device is housed in a small surface mount 15mm × 15mm × 2.82mm LGA package. Operating over an input voltage range of 4.5V to 20V, the LTM4603 supports an output voltage range of 0.6V to 5V as well as output voltage tracking and margining. The high efficiency design delivers 6A continuous current (8A peak). Only bulk input and output capacitors are needed to complete the design. The low profile (2.82mm) and light weight (1.7g) package easily mounts on the unused space on the back side of PC boards for high density point of load regulation. The µModule regulator can be synchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase® operation for high load currents. A high switching frequency and adaptive on-time current mode architecture deliver a very fast transient response to line and load changes without sacrificing stability. An onboard remote sense amplifier can be used to accurately regulate an output voltage independent of load current. The onboard remote sense amplifier is not available in the LTM4603-1. The LTM4603/LTM4603-1 are pin compatible with the 12A LTM4601/LTM4601-1. L, LT, LTC, LTM, Linear Technology, the Linear logo, µModule and PolyPhase are registered trademarks and LTpowerCAD is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical Application 1.5V/6A Power Supply with 4.5V to 20V Input VIN 4.5V TO 20V CIN CLOCK SYNC TRACK/SS CONTROL ON/OFF 392k VIN PGOOD PLLIN TRACK/SS VOUT RUN COMP INTVCC DRVCC MPGM LTM4603 SGND PGND VFB MARG0 MARG1 VOUT_LCL DIFFVOUT VOSNS+ VOSNS– fSET 100pF MARGIN CONTROL 40.2k VOUT 1.5V 6A COUT 5% MARGIN 4603 TA01a EFFICIENCY (%) Efficiency vs Load Current with 12VIN 100 95 90 85 80 75 70 65 60 55 50 45 40 0 1 12VIN, 1.2VOUT 12VIN, 1.5VOUT 12VIN, 1.8VOUT 12VIN, 2.5VOUT 12VIN, 3.3VOUT 12VIN, 5VOU.


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