Dual Ultrathin 2.5A or Single 5A Step-Down DC/DC μModule Regulator
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Product Selector CardμModule Power Products Simplify Power
Features and Benefits
- <2mm Height, Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)
- Wide Input Voltage Range: 4V to 20V
- Input Voltage Down to 2.375V with External Bias
- 0.6V to 5.5V Output Voltage
- 3A DC Output Current
- ±1.5% Maximum Total DC Output Voltage Error
- Current Mode Control, Fast Transient Response
- Low EMI EN55022 Class B Compliant
- External Frequency Synchronization
- Multiphase Operation with Current Sharing
- Output Voltage Tracking
- Selectable Discontinuous Mode
- Power Good Indicator
- Overvoltage, Overcurrent and Overtemperature Protection
- Ultrathin (6.25mm × 6.25mm × 1.82mm) LGA Package and (6.25mm × 6.25mm × 2.42mm) BGA Package
The LTM4623 is a complete 3A step-down switching mode μModule (power module) regulator in a tiny ultrathin 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × 6.25mm × 2.42mm BGA packages. Included in the package are the switching controller, power FETs, inductor and support components. Operating over an input voltage range of 4V to 20V or 2.375V to 20V with an external bias supply, the LTM4623 supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Its high efficiency design delivers 3A continuous output current. Only ceramic input and output capacitors are needed.
The LTM4623 supports selectable discontinuous mode operation and output voltage tracking for supply rail sequencing. Its high switching frequency and current mode control enable a very fast transient response to line and load changes without sacrificing stability.
Fault protection features include overvoltage, overcurrent and overtemperature protection.
The LTM4623 is available with SnPb (BGA) or RoHS compliant terminal finish.
- PCIe and Backside PCB Mounting
- Telecom, Datacom, Networking and Industrial Equipment
- Data Storage Rack Units and Cards
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.
Evaluation Kits (2)
Demonstration circuit 2721A-A features the LTM4623 μModule® regulator, a tiny high performance high efficiency step-down regulator configured as an inverting buck-boost regulator. The DC2721A-A has an operating input voltage range of 4V to 15V and is able to provide an output current of up to 2A. The output voltage can be programmed between –0.6V and –5.5V. The LTM4623 is a complete DC/DC point of load regulator in a thermally enhanced 6.25mm × 6.25mm × 1.82mm LGA package requiring only a few input and output capacitors. The LTM4623 data sheet must be read in conjunction with this demo manual for working on or modifying demo circuit 2721A-A.
Demonstration circuit 2171A-A features the LTM4623 μModule® regulator, a tiny low profile high performance step-down regulator. The LTM4623 has an operating input voltage range of 4V to 20V and is able to provide an output current of up to 3A. The output voltage is programmable from 0.6V to 5V. The LTM4623 is a complete DC/DC point of load regulator in a 6.25mm × 6.25mm × 1.82mm round pad LGA package requiring only a few input and output capacitors. Output voltage tracking is available through the TRACK/SS pin for supply rail sequencing.
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.
To open the project file for this circuit:
Step 1: Download and install LTpowerCAD on your computer.
Step 2: Click on the link(s) in the section below to download part-specific project files.
Step 3: If the project file doesn't run, right-click the link and select "Save Target As." Then start the LTpowerCAD tool and open the project file by selecing "Open Project" from the "File" menu.
Design tools for the following parts are available in LTpowerCAD:
LTM4623 Companion Parts
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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.