Linear Technology Corporation Introducing the LTM®4618 26V, 6A Step-Down µModule® Regulator Dave Quarles Vice President of International Sales

Introducing The LTM4618 The LTM4618 is a 4.5V to 26.5V VIN highly efficient step-down µModule regulator capable of delivering 6A of output current. Purpose of this training: Explain what is a µModule regulator and its benefits Provide an in-depth look at the LTM4618 Main features / functionality and benefits / reliability testing Provide instructions for obtaining design support and additional product information Welcome to the LTM4618 step-down micro-module regulator product training. This presentation will cover the features, benefits and design support tools available for the LTM4618, a 26V input 6A step-down switching regulator.

What is a µModule Regulator? A Complex Power Solution Becomes… Simple Again Product displayed for demonstration purposes only Linear Technology’s step-down micro-module regulators are complete power systems containing the DC/DC controllers, power switches, inductors, compensation circuitry and a modest amount of input and output bypass capacitance in a single package. This allows what was a complex DC/DC power solution to become simple again.

DC/DC Converter Comparison Table µModule® Regulator Linear Regulator Switching Regulator Switching Controller High Efficiency Region1 (VOUT vs. VIN) Wide Narrow (VOUT ≥ 85% of VIN) Component Count Low Moderate High Output Power Low to High Low to Mid Design Effort PCB Layout Effort Schematic     By including the controllers, power MOSFETs, inductors, input and output bypass capacitors and compensation circuitry, the LTM product family simplifies component selection, PCB layout and design-in effort to the level of a comparably feature-rich linear regulator. At the same time, they operate with high efficiency over a wide range of input and output voltage combinations like a switching regulator. Additionally, as many as four micro-module converters may paralleled together for even greater output current capability. Linear Technology’s micro-module regulators present an excellent DC/DC converter solution for engineers seeking the fastest time to market and/or facing limited power design resources.  1. Defined as supporting 85% efficiency or greater for this comparison

LTM4618 Key Features 4.5V to 26.5V input range Up to 6A output current 0.8V to 5V output range ±1.2% VREF Accuracy (-40°C to +125°C) Up to 96% Efficient Externally Adj FSW 250kHz – 780kHz Synchronizable to external clock Optional Pulse Skip or Burst Mode Operation for high efficiency at light loads Adjustable soft start 9 x 15 x 4.32mm LGA package optional The LTM4618 step-down micro-module regulator delivers up to 6A from an input supply ranging from 4.5V to 26.5V. An accurate output voltage in the range of 0.8V to 5V is determined by a single external resistor. The external clock input supports a uniform switching frequency within the system for noise isolation. Packaged within a 9 x 15 x 4.32mm land grid array package, the LTM4618 is compatible with surface mount reflow techniques and is RoHS compliant.

LGA Reliability Combined data for all LTMs in 9 x 15mm LGA Device Hours Failures High Temperature Bake (+150°C) Operating 1,829,581 Life Test (+125°C equivalent) 938,000 Device Cycles Temp Cycle (-65°C to +150°C) 2,713,500 Thermal Shock (-65°C to +150°C) 1,773,000 Board Mount Temp Cycle (-40°C to +125°C) 548,000 Linear Technology’s LGA packages are thermally efficient, highly reliable enclosures for the components inside the micro-module regulator. This table shows the latest datapoints from ongoing reliability tests. The complete report is available for download at www.linear.com.

LTM4618 LTSpice Model Simple to verify using LTspice simulation software available for free! Pre-built models for virtually all Linear Technology products and many discrete components Detailed application & Design notes available for download To assist with the design process, Linear Technology provides LTspice, a free circuit simulation tool with pre-built models of Linear Technology products and standard discrete components. LTspice is available for download at www.linear.com/ltspice.

LTM4618: Summary For additional information or demo circuits related to the LTM4618 or other µModule® regulator products please visit: http://www.linear.com/micromodule Full suite of design support resources available for free download: LTspice circuit simulation LTM product application notes LTM product design notes PCB assembly guidelines video Demo Circuit Gerber files Look for the Quick Start Link! For more information on the LTM4618 or any of the more than 30 members of the Linear Technology micro-module product family please visit our website at www.linear.com/micromodule. There the quick start link offers a full suite of design support resources available for free download covering circuit simulation, PCB routing recommendations, thermal analysis, board assembly, rework and more! Thank you for your interest in the LTM4618 26V, 6A step-down micro-module regulator.