Low VIN, 8A DC/DC μModule (Power Module) Regulator with Tracking, Margining, and Frequency Synchronization
Features and Benefits
- Complete Standalone Power Supply
- ±1.5% Output Voltage Regulation
- 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 Tracking and 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
- Small Surface Mount Footprint, Low Profile (15mm × 9mm × 2.8mm) LGA Package
The LTM4608 is a complete 8A switch mode DC/DC power supply. 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 LTM4608 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.
The low profile package (2.8mm) enables utilization of unused space on the back side of PC boards for high density point-of-load regulation. The high switching frequency and a 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 power module is offered in a compact and thermally enhanced 15mm × 9mm × 2.8mm LGA package. The LTM4608 is Pb-free and RoHS compliant.
For easier PC board layout and assembly due to increased spacing between land grid pads, please refer to the LTM4608A.
|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|
- Telecom, Networking and Industrial Equipment
- Storage Systems
- Point of Load Regulation
Product Lifecycle Production
At least one model within this product family is in production and available for purchase. The product is appropriate for new designs but newer alternatives may exist.
Tools & Simulations
LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.
To launch ready-to-run LTspice demonstration circuits for this part:
Step 1: Download and install LTspice on your computer.
Step 2: Click on the link in the section below to download a demonstration circuit.
Step 3: If LTspice does not automatically open after clicking the link below, 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.
Models for the following parts are available in LTspice:
LTpowerCAD® is a power supply design program which selects power stage components, provides detailed power efficiency, shows quick loop Bode plot stability and load transient analysis, and can export to LTspice for simulation.
Design tools for the following parts are available in LTpowerCAD:
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Sample & Buy
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 Analog Devices, Inc. sales office or authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.