POWER AND LINEAR IC SOLUTIONS

Complete DC/DC Regulator System in SM Package Satisfies Military Needs

Linear Technology Corporation’s LTM4600HVMPV is a complete and encapsulated 10A switching DC/DC regulator system designed for rugged military and avionics applications and weighing only 1.7g. The first device in a new family of µModule™ (micromodule) DC/DC regulators, its package resembles a surface mount IC, while its circuit topology resembles a simple linear regulator.

Comprised entirely of Linear Technology silicon and supported by rigorous in-house testing, the LTM4600HVMPV combines component-level reliability and industry-leading performance. It is fully tested over the -55ºC to +125ºC temperature range including start-up at -55ºC. Tests have demonstrated zero-failure operation for 500,360 device cycles for thermal shock from -65ºC to +150ºC; 6,995,540 device hours for power cycle from +50ºC to +100ºC; 888,106 device cycles for board mount temperature cycle from -40ºC to +125ºC and for solder shock at +245ºC.

Tested to mechanical shock levels of 1500g, the device is supplied in a 15mm x 15mm x 2.8mm military plastic LGA (Land Grid Array) package. This package has been qualified by military system designers as the preferred option for high power DC/DC solutions because it has lower thermal impedance than a similar size BGA (Ball Grid Array). In addition, the plastic package meets Linear Technology’s military plastic standard.



The LTM4600HVMPV is a synchronous switch mode step-down regulator with built-in inductor, supporting power components and compensation circuitry. The device operates from an input supply range of 4.5V to 28V, producing a regulated output voltage from 0.6V to 5V. With efficiency as high as 92%, it can deliver a load current of 10A continuous and 14A peak.

The device dramatically simplifies power supply design and construction, requiring only input and output bulk capacitors and a resistor to set the output voltage. Its standard LGA package can be handled and assembled like any IC. Moreover, its low profile design permits the device to be soldered onto the back side of a printed circuit board, freeing space on the front side of the board. For board insertion and assembly, the device requires standard tooling and pick and place machines. The LTM4600HVMPV is self-protected against output overvoltage and short circuit conditions.

Features

• Complete switch mode power supply
• Wide input voltage range: 4.5V to 28V
• 10A continuous, 12A peak output current
• 0.6V to 5V output voltage
• Small footprint, low profile (15mm × 15mm × 2.8mm) LGA Package
• -55°C to +125°C operating temperature range
• Up to 92% efficiency
• Programmable soft-start
• Output overvoltage protection
• Optional short-circuit shutdown timer
• 1.5% output voltage regulation
• Ultrafast transient response

Applications

• Military
• Aerospace
• High-reliability communications systems

For further information, including the LTM4600HV Datasheet, Military Plastics Grade Flowchart as well as the Reliable Solutions for Rugged Environments Chronicle, please click here