Features and Benefits
- Dual 18A or Single 36A Output
- Input Voltage Range: 4.5V to 18V (after date code 1720*)
- Output Voltage Range: 0.6V to 8V (after date code 1720*)
- ±1.5% Maximum Total DC Output Error Over Line, Load and Temperature
- Higher Light Load Efficiency and Wider VOUT Range Than LTM4630
- Differential Remote Sense Amplifier
- Current Mode Control/Fast Transient Response
- Multiphase Parallel Current Sharing Up to 144A
- Internal Temperature Monitor
- Pin Compatible with the LTM4620A (Dual 13A, Single 26A) and LTM4630 (Dual 18A, Single 36A)
- Adjustable Switching Frequency or Synchronization
- Overcurrent Foldback Protection
- Selectable Burst Mode® Operation, Pulse Skipping Mode Operation
- Soft-Start/Voltage Tracking
- Output Overvoltage Protection
- 16mm × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm BGA Packages
The LTM4630A is a dual 18A or single 36A output switching mode step-down DC/DC µModule® (micromodule) regulator with wider VOUT range and higher efficiency than LTM4630. Included in the package are the switching controllers, power FETs, inductors and all supporting components. Operating from an input voltage range of 4.5V to 18V, the LTM4630A supports two outputs each with an output voltage range of 0.6V to 8V, each set by a single external resistor. Its high efficiency design delivers up to 18A continuous current for each output. Only a few input and output capacitors are needed. The LTM4630A is pin compatible with the LTM4620 and LTM4620A (dual 13A, single 26A) and the LTM4630 (dual 18A, single 36A).
The device supports frequency synchronization, multiphase operation, Burst Mode operation and output voltage tracking for supply rail sequencing and has an onboard temperature diode for device temperature monitoring. High switching frequency and a current mode architecture enable a very fast transient response to line and load changes without sacrificing stability.
Fault protection features include overvoltage and overcurrent protection. The LTM4630A is offered in 16mm × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm BGA packages.
*Maximum VIN = 15V and VOUT = 5.3V with date code before 1720
|LTM4630||0.6V to 1.8V|
|LTM4630-1||0.8% DC and 3% Transient Accuracy||0.6V to 1.8V|
|LTM4630A||Higher Light Load Efficiency||0.6V to 5.3V|
- Telecom and Networking Equipment
- Storage and ATCA Cards
- Industrial Equipment
Product Lifecycle Recommended for New Designs
This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.
Evaluation Kits (2)
Demonstration circuit 2268A-F is a high efficiency, high density, dual 8A, switch mode step-down power supply on a compact 1.5' × 1.2' PCB. It features the LTM4630A μModule® regulator. The input voltage is from 4.5V to 15V. The output voltage is programmable from 0.6V to 5.3V. DC2268A-F can deliver up to 18A maximum in each channel. As explained in the data sheet, output current derating is necessary for certain VIN, VOUT, and thermal conditions. The board operates in continuous conduction mode in heavy load conditions. For high efficiency at low load currents, the resistor jumper (R1/R2) selects pulse-skipping mode for noise sensitive applications or Burst-Mode® in less noise sensitive applications. Two outputs can be connected in parallel for a single 36A output solution with optional jumper resistors. The board allows the user to program how its output ramps up and down through the TRACK/SS pin. Remote output voltage sensing is available for improved output voltage regulation at the load point. An optional input inductor L1 reduces the EMI noise for noise sensitive applications. DC2268A can be easily inserted to an edge connector for testing and debugging. These features and the availability of the LTM4630A in a compact 16mm × 16mm × 4.41mm LGA package make it ideal for use in many high-density point-of-load regulation applications. The LTM4630A data sheet must be read in conjunction with this demo manual for working on or modifying the DC2268A-F.
Demonstration circuit 2152A features the LTM4630AEV high efficiency, high density, dual 18A, switch mode step-down µModule regulator. The input voltage is from 6V to 15V, and the output voltages are set at 3.3V and 5V, but are programmable from 0.6V to 5.3V. The DC2152A can deliver up to 18A maximum from each channel. The two outputs can be connected in parallel for a single 36A output solution with optional jumper resistors. ±3% transient accuracy can be achieved with a 25% load step.
Output current derating is necessary for certain VIN, VOUT, and thermal conditions. Its many features and its compact 16mm × 16mm × 4.41mm LGA package make the LTM4630AEV ideal for use in many high-density point-of-load regulation applications.
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:
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal.
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.