Introducing the LTM4611 - Ultralow Input Voltage µModule Regulator

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To introduce the LTM4611, an efficient 15A single supply ultra-low input voltage step-down µModule® regulator

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  • Welcome to the training module on Introducing the LTM4611 – Ultralow Input Voltage µModule Regulator
  • This training module will introduce the LTM4611, an efficient 15A single supply ultra-low input voltage step-down µModule ® regulator.
  • By including the controllers, power MOSFETs, inductors, input and output bypass capacitors and compensation circuitry, the LTM product family simplifies power supply design for system engineers. The LTM4611 step-down regulator in particular delivers up to 15A from a single supply rail of as little as 1.5V and may be paralleled to support even higher output current demands. An external clock input supports a uniform switching frequency within the system for noise isolation and/or multiphase operation to reduce the amount of input capacitance required. With an internal differential remote sense amplifier, the LTM4611 delivers excellent voltage regulation at the load.
  • The LTM4611 operates from a single input supply from 1.5 to 5.5 volts to deliver an output voltage between 0.8 to 5.0 volts with 2% accuracy over the full operating input, output and temperature range. It also offers a user selectable burst mode or pulse skip mode operation to deliver 83% efficiency at light loads. Additional features include adjustable soft start, power good, overcurrent protection and output tracking / sequencing in multiple supply rail systems. Packaged in a compact 15 x 15 x 4.3mm high LGA, the LTM4611 is compatible with surface mount reflow techniques and is RoHS compliant.
  • LGA packages are thermally efficient, highly reliable enclosures for the micromodule regulator family. This table shows the latest datapoints from ongoing reliability tests. The complete report is available for download from the LTM4611 product webpage.
  • LTM4611 is easily paralleled to help spread thermal losses over a wider PCB area and can also be beneficial to reduce end product costs. This can become a useful strategy for customers seeking to segment their boards or systems into different price / performance tiers. An optional external clock may be used to eliminate any beat frequencies between the two devices and implement multi-phase switching to reduce the amount of input capacitance required for proper operation.
  • 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.
  • The LTM4611 is the first DC/DC step-down module product with the ability to operate from a single rail as low as 1.5V and does so with up to 89% efficiency. This 15A output micromodule requires just 4 external components and is backed by Linear Technology’s reputation for impressive design support, performance, quality, and reliability.
  • Thank you for taking the time to view this presentation on “ Introducing the LTM4611 – Ultralow Input Voltage µModule Regulator ” . If you would like to learn more or go on to purchase some of these devices, you may either click on the part list link right beside the play button on the TechCast portal, or simply call our sales hotline. For more technical information you may either visit the Linear Technology site, or if you would prefer to speak to someone live, please call our hotline number, or even use our ‘live chat’ online facility. You may visit element14 e-community to post your questions.
  • Introducing the LTM4611 - Ultralow Input Voltage µModule Regulator

    1. 1. Introducing the LTM4611 – Ultralow Input Voltage µModule ® Regulator <ul><li>Source: LINEAR TECHNOLOGY </li></ul>
    2. 2. Introduction <ul><li>Purpose </li></ul><ul><ul><li>To introduce the LTM4611, an efficient 15A single supply ultra-low input voltage step-down µModule ® regulator </li></ul></ul><ul><li>Outline </li></ul><ul><ul><li>An overview of the LTM4611 features </li></ul></ul><ul><ul><li>Describe the benefits of the LTM4611 </li></ul></ul><ul><ul><li>Present circuit configuration examples & design support tools </li></ul></ul><ul><li>Content </li></ul><ul><ul><li>9 pages </li></ul></ul>
    3. 3. LTM4611: Ultralow V IN , 15A DC/DC µ Module ® Regulator <ul><li>Key Features </li></ul><ul><ul><li>Complete switching regulator solution in a package </li></ul></ul><ul><ul><li>Highly Efficient single supply operation down to 1.5V input voltage </li></ul></ul><ul><ul><li>Easily Parallelable and/or Synchronizable to an external clock </li></ul></ul><ul><ul><li>Differential Remote Sensing for Precision Regulation </li></ul></ul><ul><ul><li>±2.0% Total DC Output Accuracy </li></ul></ul><ul><ul><li>Low 0.8V minimum output voltage </li></ul></ul><ul><ul><li>Only 3 external components required </li></ul></ul>Optional Components LTM4611
    4. 4. LTM4611: Specifications <ul><li>Specifications </li></ul><ul><ul><li>Single 15A step-down switching µ Module ® regulator </li></ul></ul><ul><ul><li>High Efficiency </li></ul></ul><ul><ul><ul><li>Up to 93% at 15A </li></ul></ul></ul><ul><ul><ul><li>Up to 83% at 1A </li></ul></ul></ul><ul><ul><li>Low Input Voltage Range: </li></ul></ul><ul><ul><ul><li>1.5V to 5.5V (DC/DC) </li></ul></ul></ul><ul><ul><li>Low Output Voltage Range: </li></ul></ul><ul><ul><ul><li>0.8V to 5.0V (DC/DC) </li></ul></ul></ul><ul><ul><ul><li>± 2% over line, load, temp </li></ul></ul></ul><ul><ul><li>Synchronizable (360kHz-710kHz) </li></ul></ul><ul><ul><li>Adjustable Soft Start & Power Good </li></ul></ul><ul><ul><li>Compact 15 x 15 x 4.32mm LGA (Land Grid Array) </li></ul></ul>
    5. 5. LGA Reliability The complete µModule Regulator reliability report is continually updated and available on the LTM4611 product webpage. Combined data for all LTMs in 15 x 15mm LGA Device Hours Failures High Temperature Bake (+150°C) Operating 3,754,868 0 Life Test (+125°C equivalent) 924,385 0 Device Cycles Failures Temp Cycle (-65°C to +150°C) 5,712,290 0 Thermal Shock (-65°C to +150°C) 4,692,800 0 Board Mount Temp Cycle (-40°C to +125°C) 1,141,000 0
    6. 6. LTM4611: Current Sharing <ul><li>Benefits </li></ul><ul><ul><li>To spread power loss across multiple regulators </li></ul></ul><ul><ul><li>Scale manufacturing costs according to system performance </li></ul></ul>CLK* (Optional) *To reduce input capacitance requirement V OUT I OUT up to 30A V IN LTM4611 VIN COMP TRACK/SS RUN MODE_PLLIN SGND GND VOUT VOUT_LCL DIFFVOUT VOSNS+ VOSNS- VFB LTM4611 VIN COMP TRACK/SS RUN MODE_PLLIN SGND GND VOUT VOUT_LCL DIFFVOUT VOSNS+ VOSNS- VFB 0° 180°
    7. 7. LTM4611: LTSpice Model <ul><li>Simple to verify using LTspice simulation software available for free! </li></ul><ul><ul><li>Pre-built models for virtually all Linear Technology products and many discrete components </li></ul></ul><ul><li>Detailed application & Design notes available for download </li></ul><ul><li>www.linear.com/ltspice </li></ul>
    8. 8. LTM4611: Summary <ul><li>Very high efficiency conversion from a single 1.5V input </li></ul><ul><li>High output current 15A </li></ul><ul><li>Compact surface mount package </li></ul><ul><li>Backed by Linear’s impressive test and reliability programs </li></ul><ul><li>Extensive design tools and notes available for download </li></ul><ul><li>Demoboards and samples available </li></ul>
    9. 9. Additional Resource <ul><li>For ordering LTM4611 regulators, please click the part list or </li></ul><ul><li>Call our sales hotline </li></ul><ul><li>For more product information go to </li></ul><ul><li>http://www.linear.com/micromodule </li></ul><ul><li>Visit element14 to post your question </li></ul><ul><ul><li> www.element-14.com </li></ul></ul><ul><li>For additional inquires contact our technical service hotline or even use our “Live Technical Chat” online facility </li></ul>Newark Farnell

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