The LTM4649 is a complete 10A high efficiency switching mode step-down DC/DC µModule® regulator in a small 9mm × 15mm × 4.92 BGA package. Included in the package are the switching controller, power FETs, inductor, and all support components. Operating over an input voltage range of 4.5V to 16V, the LTM4649 supports an output voltage range of 0.6V to 3.3V, set by a single external resistor. This high efficiency design delivers 10A continuous current. Only bulk input and output capacitors are needed.

This 10A step-down regulator from Linear Technology has high operating efficiency and low temperature rise and is offered in a small thermally enhanced BGA package. The LTM4649 requires no heat sink, airflow or output current derating at full power from 0ºC to 83ºC ambient temperature, while operating up to 86% efficiency (5VIN –12VIN, 1.5VOUT at 10A). Output current is reduced only by 4A up to 100ºC ambient and by 2A with 400LFM.

This device converts input supplies ranging from 4.5V to 16V to lower output voltages ranging from 0.6V to 3.3V. Equipped with a differential remote sense amplifier to compensate for voltage droop due to circuit board trace impedance, the LTM4649 regulates a load voltage with +/- 1.5% accuracy over line, load and temperature (-40ºC to 125ºC).

The LTM4649 provides input and output clocks for multiphase operation among multiple devices to accurately current share for up to 40A load. Multiphase operation reduces input and output ripple as well as the number of input and output capacitors. Applications include point-of-load conversion from 12V or 5V inputs in telecom, industrial, avionics and test equipment.

High switching frequency and a current mode architecture enables a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, programmable multiphase operation, spread spectrum, output voltage tracking for supply rail sequencing.

The LTM4649 is synchronizable to an external clock ranging in frequency from 400kHz to 750kHz. With options for Burst Mode® operation for the highest conversion efficiency at light load and pulse-skipping operation for lower output voltage ripple, gives users the option to personalize a circuit’s performance. The LTM4649 permits output voltage tracking for sequencing multiple rails in a system. To protect the load, fault protection features include output overvoltage protection and overcurrent protection.

The LTM4649 is offered in a small thermally enhanced 9mm × 15mm × 4.92mm BGA package and is available with SnPb (BGA) or RoHS compliant terminal finish.

The LTM4649 E- and I-grades are guaranteed for internal operation from -40ºC to 125ºC. Pricing for 1,000-piece quantities starts at $16.75 each.

For more information, visit www.linear.com/product/LTM4649

Summary of Features of the LTM4649:

  • 10A Output Current
  • 4.5V to 16V Input, 0.6V to 3.3V Output
  • No Heat Sink, Airflow or Current Derating up to 83ºC Ambient Temperature
  • +/-1.5% Maximum Total DC Output Voltage Error
  • Multiphase Operation & Synchronizable
  • 9mm x 15mm x 4.92mm BGA

Typical Application

Applications

  • Telecom, Networking and Industrial Equipment
  • Point of Load Regulation

About Linear Technology

Linear Technology Corporation, a manufacturer of high performance linear integrated circuits, was founded in 1981, became a public company in 1986 and joined the S&P 500 index of major public companies in 2000. Linear Technology products include high performance amplifiers, comparators, voltage references, monolithic filters, linear regulators, DC-DC converters, battery chargers, data converters, communications interface circuits, RF signal conditioning circuits, µModule products, and many other analog functions.  Applications for Linear Technology’s high performance circuits include telecommunications, cellular telephones, networking products such as optical switches, notebook and desktop computers, computer peripherals, video/multimedia, industrial instrumentation, security monitoring devices, high-end consumer products such as digital cameras and MP3 players, complex medical devices, automotive electronics, factory automation, process control, and military and space systems.

Linear Technology (UK) Limited
Tel: +44 (0)1628 477066

E-mail: uksales@linear.com
Web site: www.linear.com

Website for product information:  http://www.linear.com/product/LTM4649