LTM4615 - Triple Output, Low Voltage DC/DC μModule (Power Module) Regulator

Features

    • Dual 4A Output Power Supply with 1.5A VLDO™
    • Short-Circuit and Overtemperature Protection
    • Power Good Indicators
    Switching Regulators Section—Current Mode Control
    • Input Voltage Range: 2.375V to 5.5V
    • 4A DC Typical, 5A Peak Output Current Each
    • 0.8V Up to 5V Output Each, Parallelable
    • ±2% Total DC Output Error
    • Output Voltage Tracking
    • Up to 95% Efficiency
    • Programmable Soft-Start
    VLDO Section
    • VLDO, 1.14V to 3.5V Input Range
    • VLDO, 0.4V to 2.6V, 1.5A Output
    • VLDO, 40dB Supply Rejection at fSW
    • ±1% Total DC Output Error
    • Small and Very Low Profile Package:
      15mm × 15mm × 2.82mm

Typical Application

LTM4615 Typical Application
LTM4615 Typical Application

Description

The LTM4615 is a complete 4A dual output switching mode DC/DC power supply plus an additional 1.5A VLDO (very low dropout) linear regulator. Included in the package are the switching controllers, power FETs, inductors, a 1.5A regulator and all support components. The dual 4A DC/DC converters operate over an input voltage range of 2.375V to 5.5V, and the VLDO operates from a 1.14V to 3.5V input. The LTM4615 supports output voltages ranging from 0.8V to 5V for the DC/DC converters, and 0.4V to 2.6V for the VLDO. The three regulator output voltages are set by a single resistor for each output. Only bulk input and output capacitors are needed to complete the design.

The low profile package (2.82mm) enables utilization of unused space on the bottom of PC boards for high density point of load regulation. 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 output voltage tracking for supply rail sequencing.

Additional features include overvoltage protection, foldback overcurrent protection, thermal shutdown and programmable soft-start. The power module is offered in a space saving and thermally enhanced 15mm × 15mm × 2.82mm LGA package. The LTM4615 is Pb-free and RoHS compliant.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTM4615EV#PBF 15mm × 15mm × 2.82mm LGA LGA E 05-08-1816 Yes
LTM4615IV#PBF 15mm × 15mm × 2.82mm LGA LGA I 05-08-1816 Yes


LTM4615 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
  • Please refer to our general ordering information or the product datasheet for more details

Package Variations and Pricing

Part Number Package Temp Price
(1-99)
Price
(1k)*
RoHS
LTM4615EV#PBF 15mm × 15mm × 2.82mm LGA E $24.57 $17.20 Yes
LTM4615IV#PBF 15mm × 15mm × 2.82mm LGA I $27.03 $18.92 Yes
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* The USA list pricing shown is for BUDGETARY USE ONLY, shown in United States dollars (FOB USA per unit for the stated volume), and is subject to change. International prices may differ due to local duties, taxes, fees and exchange rates. For volume-specific price or delivery quotes, please contact your local Linear Technology sales office or authorized distributor.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.

Part Number Description Price Documentation
DC1367A LTM4615EV Demo Board | uModule Regulator, Dual 4A Plus VLDO, 2.5V ≤ VIN ≤ 5.5V, Vout = 1.8V @ 4A, Vout2 = 1.2V @ 2.5A, Vout3 = 1V @ 1.5A $65.00
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Click here to view our complete list of demo boards

Applications

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Design Tools

LTspice

LTspice® software is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. Click here to download LTspice

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
  • Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
  • Step 3: If LTspice does not automatically open after clicking the link above, you can instead run the simulation by right clicking on the link and selecting "Save Target As." After saving the file to your computer, start LTspice and open the demonstration circuit by selecting 'Open' from the 'File' menu

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:
LTM4615

LTpowerCAD

The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:
LTM4615

Technical Support