LTM4608A - Low VIN, 8A DC/DC μModule (Power Module) with Tracking, Margining, and Frequency Synchronization

Features

  • Complete Standalone Power Supply
  • ±1.75% Total DC Output Error (–55°C to 125°C)
  • 2.7V to 5.5V Input Voltage Range
  • 8A DC, 10A Peak Output Current
  • 0.6V Up to 5V Output
  • Output Voltage Tracking and Margining
  • Power Good Tracks Margining
  • Multiphase Operation
  • Parallel Current Sharing
  • Onboard Frequency Synchronization
  • Spread Spectrum Frequency Modulation
  • Overcurrent/Thermal Shutdown Protection
  • Current Mode Control/Fast Transient Response
  • Selectable Burst Mode® Operation
  • Up to 95% Efficiency
  • Output Overvoltage Protection
  • 9mm × 15mm × 2.82mm LGA and 9mm × 15mm × 3.42mm BGA Packages

Typical Application

LTM4608A Typical Application
LTM4608A Typical Application

Description

The LTM®4608A is a complete 8A switch mode DC/DC power supply with ±1.75% total output voltage error. Included in the package are the switching controller, power FETs, inductor and all support components. Operating over an input voltage range of 2.7V to 5.5V, the LTM4608A supports an output voltage range of 0.6V to 5V, set by a single external resistor. This high efficiency design delivers up to 8A continuous current (10A peak). 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 back side of PC boards for high density point-of-load regulation. The 0.630mm LGA pads with 1.27mm pitch simplify PCB layout by providing standard trace routing and via placement. The high switching frequency and current mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, programmable multiphase and/or spread spectrum operation, output voltage tracking for supply rail sequencing and voltage margining.

Fault protection features include overvoltage protection, overcurrent protection and thermal shutdown. The LTM4608A is offered in 9mm × 15mm × 2.82mm LGA and 9mm × 15mm × 3.42mm BGA packages. The LTM4608A is available with SnPb (BGA) or RoHS compliant terminal finish.

  Notes
LTM4608 -
LTM4608A Smaller pad sizes provide more distance between adjacent pads therefore there is less chance of solder paste or solder spreading outside the pad area

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
LTM4608AEV#PBF 15mm × 9mm × 2.82mm LGA LGA E 05-08-1821 Yes
LTM4608AEY#PBF 15mm × 9mm × 2.82mm LGA LGA E 05-08-1821 Yes
LTM4608AIV#PBF 15mm × 9mm × 2.82mm LGA LGA I 05-08-1821 Yes
LTM4608AIY#PBF 15mm × 9mm × 2.82mm LGA LGA I 05-08-1821 Yes
LTM4608AMPV#PBF 15mm × 9mm × 2.82mm LGA LGA MP 05-08-1821 Yes
LTM4608AMPY 15mm x 9mm x 3.42mm BGA BGA MP 05-08-1993 No
LTM4608AMPY#PBF 15mm x 9mm x 3.42mm BGA BGA MP 05-08-1993 Yes


LTM4608A Package Drawing
LTM4608A 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
LTM4608AEV#PBF 15mm × 9mm × 2.82mm LGA E $16.14 $11.30 Yes
LTM4608AEY#PBF 15mm × 9mm × 2.82mm LGA E $17.22 $12.05 Yes
LTM4608AIV#PBF 15mm × 9mm × 2.82mm LGA I $17.76 $12.43 Yes
LTM4608AIY#PBF 15mm × 9mm × 2.82mm LGA I $18.83 $13.18 Yes
LTM4608AMPV#PBF 15mm × 9mm × 2.82mm LGA MP $31.79 $22.25 Yes
LTM4608AMPY 15mm x 9mm x 3.42mm BGA MP $40.63 $28.44 No
LTM4608AMPY#PBF 15mm x 9mm x 3.42mm BGA MP $32.86 $23.00 Yes
Buy NowRequest Samples
* 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
DC1400A LTM4608AEV DEMO BOARD | 2.7Vinmin, 8A DC/DC uModule Regulator $65.00
Buy Now
Click here to view our complete list of demo boards

Applications

  • Telecom, Networking and Industrial Equipment
  • Storage Systems
  • Point of Load Regulation

Product Notifications

Please login to your MyLinear account for notifications of datasheet updates, new document releases and LTspice model announcements for your favorite products. If you do not have a MyLinear account you may Sign Up Now.

Forgot your password? Click here.
Need help? Email mylinear@linear.com with questions and comments.

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:
LTM4608
LTM4608A

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:
LTM4608

Technical Support