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LTM4608A Datasheet(PDF) 1 Page - Linear Technology |
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LTM4608A Datasheet(HTML) 1 Page - Linear Technology |
1 / 24 page LTM4608A 1 4608afa TYPICAL APPLICATION FEATURES APPLICATIONS DESCRIPTION Low VIN, 8A DC/DC µModule with Tracking, Margining, and Frequency Synchronization The LTM ®4608A is a complete 8A switch mode DC/DC power supply with ±1.75% total output voltage error. In- cluded in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 2.7V to 5.5V, the LTM4608A sup- ports an output voltage range of 0.6V to 5V, set by a single external resistor. This high efficiency design delivers up to 8A continuous current (10A peak). Only bulk input and output capacitors are needed to complete the design. The low profile package (2.8mm) enables utilization of unused space on the back side of PC boards for high density point-of-load regulation. The 0.630mm LGA pads with 1.27mm pitch simplify PCB layout by providing stan- dard trace routing and via placement. The high switching frequency and current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency syn- chronization, programmable multiphase and/or spread spectrum operation, output voltage tracking for supply rail sequencing and voltage margining. Fault protection features include overvoltage protection, overcurrent protection and thermal shutdown. The power module is offered in a compact and thermally enhanced 15mm × 9mm × 2.8mm surface mount LGA package. The LTM4608A is Pb-free and RoHS compliant. 3V to 5.5V Input to 1.8V Output DC/DC μModule™ ■ Complete Standalone Power Supply ■ ±1.75% Total DC Output Error (–55°C to 125°C) ■ 2.7V to 5.5V Input Voltage Range ■ 8A DC, 10A Peak Output Current ■ 0.6V Up to 5V Output ■ Output Voltage Tracking and Margining ■ Power Good Tracks Margining ■ Multiphase Operation ■ Parallel Current Sharing ■ Onboard Frequency Synchronization ■ Spread Spectrum Frequency Modulation ■ Overcurrent/Thermal Shutdown Protection ■ Current Mode Control/Fast Transient Response ■ Selectable Burst Mode® Operation ■ Up to 95% Efficiency ■ Output Overvoltage Protection ■ Small, Low Profile 9mm × 15mm × 2.8mm LGA Package (0.630mm Pads) ■ Telecom, Networking and Industrial Equipment ■ Storage Systems ■ Point of Load Regulation , LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology Corporation. μModule is a trademark of Linear Technology Corporation. All other trademarks are the property of their respective owners. Protected by U.S. Patents, including 5481178, 6580258, 6304066, 6127815, 6498466, 6611131. VIN SVIN SW RUN PLLLPF TRACK VOUT FB ITH ITHM PGOOD MGN CLKOUT GND CLKIN CLKIN 4.87k 4608A TA01a 100μF 10μF PGOOD VOUT VOUT 1.8V VIN 3V TO 5.5V LTM4608A SGND Efficiency vs Load Current LOAD CURRENT (A) 0 70 75 80 85 90 95 100 246 8 4608A TA01b 10 VOUT = 1.8V VIN = 5V VIN = 3.3V |
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