The LTM4648 from Linear Technology is a 2.375VIN to 5.5VIN, 10A step-down µModule® regulator in a 9mm x 15mm x 4.92mm BGA package with high operating efficiency and low temperature rise. With an integrated 5V boost converter to drive the gates of its N-channel MOSFETs from low VIN supplies, the LTM4648 improves efficiency and simplifies system design by eliminating the need for 5V or 12V power rails and dependency on auxiliary regulators.
The device supports frequency synchronization, programmable multiphase operation and output voltage tracking for supply rail sequencing. Applications include point-of-load conversion from a 3.3V main power bus and battery-powered systems in telecom, medical, industrial, avionics and portable test equipment.
Full power of 10A, (full range of VOUT and VIN) can be delivered when operating from 0°C to 85°C ambient temperature. The LTM4648 requires no heat sink or airflow nor is its output current de-rated at full power. Half-power occurs at high ambient temperature of 110°C (TJMAX=125°C). The µModule regulator operates at up to 91% efficiency (3.3VIN or 5VIN, 1.5VOUT at 10A). 95% efficiency is achieved when converting 3.3VIN to 2.5VOUT at 10A.
This device regulates output voltages adjustable from 0.6V to 5V. Equipped with a differential remote sense amplifier to compensate for voltage droop due to circuit board trace impedance, the LTM4648 regulates a load voltage with ±1.5% accuracy over line, load and temperature (-40°C to 125°C).
This µModule regulator 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.
The LTM4648 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.
This device permits output voltage tracking for sequencing multiple rails in a system. Fault protection features include output overvoltage protection, overcurrent protection and thermal shutdown.
The LTM4648 is RoHS compliant and is offered in a small 9mm × 15mm × 4.92mm BGA package. For up to 16VIN operation, see the LTM4649. The LTM4648 ‘E’ and ‘I’ grades are guaranteed for internal operation from -40°C to 125°C. Pricing for 1,000-piece quantities starts at $13.25 each.
For more information, visit www.linear.com/product/LTM4648.
