LTM4603

6A DC/DC µModule (Power Module) with PLL, Output Tracking and Margining

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Overview

Features and Benefits
Product Details

Features and Benefits

Complete Switch Mode Power Supply
Wide Input Voltage Range: 4.5V to 20V
6A DC Typical, 8A Peak Output Current
0.6V to 5V Output Voltage
Output Voltage Tracking and Margining
Remote Sensing for Precision Regulation (LTM4603 Only)
Typical Operating Frequency: 1MHz
PLL Frequency Synchronization
1.5% Regulation
Current Foldback Protection (Disabled at Start-Up)
Pin Compatible with the LTM4601
Pb-Free (e4) RoHS Compliant Package with Gold Finish Pads
Ultrafast Transient Response
Current Mode Control
Up to 93% Efficiency at 5V_IN, 3.3V_OUT
Programmable Soft-Start
Output Overvoltage Protection
Small Footprint, Low Profile (15mm × 15mm × 2.8mm) Surface Mount LGA Package

Product Details

The LTM4603 is a complete 6A step-down switch mode DC/DCpower supply with on-board switching controller, MOSFETs, inductor and all support components. The µModule is housed in a small surface mount 15mm × 15mm × 2.8mm LGA package. Operating over an input voltage range of 4.5 to 20V, the LTM4603 supports an output voltage range of 0.6V to 5V as well as output voltage tracking and margining. The high efficiency design delivers 6A continuous current (8A peak). Only bulk input and output capacitors are needed to complete the design.

The low profile (2.8mm) and light weight (1.7g) package easily mounts on the unused space on the back side of PC boards for high density point of load regulation. The µModule can be synchronized with an external clock for reducing undesirable frequency harmonics and allows PolyPhase^® operation for high load currents.

A high switching frequency and adaptive on-time current mode architecture deliver a very fast transient response to line and load changes without sacrificing stability. An on-board remote sense amplifier can be used to accurately regulate an output voltage independent of load current. The on-board remote sense amplifier is not available in the LTM4603-1. The LTM4603/LTM4603-1 are pin compatible with the 12A LTM4601/LTM4601-1.

Applications

Telecom and Networking Equipment
Servers
Industrial Equipment
Point of Load Regulation

Product Categories

Power Management
- µModule Buck Regulators

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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)

DC1540B

LTC2977 Demo Board Set: Eight µModule Power Supply Management (Includes DC1360B + DC1361B) (Requires DC1613)

DC1083A-A

LTM4603 Demo Board | Step-Down μModule Regulator, 4.5V ≤ V_IN ≤ 20V, V_OUT = 0.6V/1.2V/1.5V/1.8V/2.5V/3.3V/5V @ 6A

DC1540B

View Detailed Evaluation Kit Information

The DC1540B is a demonstration system for the LTC2977 8-channel I²C/SMBus/PMBus Power System Manager with EEPROM. It consists of 2 circuit boards namely the DC1360B and DC1361B. The DC1360B contains all the circuitry needed to insert the LTC2977 into a power system and control eight power supplies. The DC1361B contains eight power supplies (LTM4603EV) which are configured to be controlled by an LTC2977. Together these two boards form a sophisticated, 8-channel, digitally programmable power supply.

Resources

DC1083A-A

View Detailed Evaluation Kit Information

Demonstration circuit DC1083A-A features the LTM4603, the high efficiency, high density step-down μModule^® regulator. The input voltage range is from 4.5V to 20V. The output voltage is jumper programmable from 0.6V to 5V. The rated load current is 6A, but derating is necessary for certain V_IN, V_OUT, and thermal conditions. The LTM4603 can be synchronized to an external clock signal by applying the clock to the PLLIN pin.

Resources

Documentation & Resources

Data Sheets

LTM4603: 6A DC/DC µModule (Power Module) with PLL, Output Tracking and Margining Data Sheet
8/31/2011
PDF

Reliability Data

R504 Reliability Data
3/26/2018
PDF

User Guides

DC1540B - Demo Manual
5/22/2015
PDF
DC1083A-A Demo Manual
8/30/2011
PDF

Product Selector Card

μModule Power Products
4/4/2017
PDF

Informational

μModule Design and Manufacturing Resources
1/30/2018

Tools & Simulations

LTspice

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.

LTspice downloads and documentation

LTspice Simulations

LTM4603 Demo Circuit - 6A DC/DC µModule (4.5-12V to 3V @ 6A)

LTM4603-1 Demo Circuit - 6A, DC/DC µModule (12V to 1.5V @ 5A)

LTM4603 Demo Circuit - 6A DC/DC µModule with Active Load Tracking (12V to 1.5V @ 5A)

Models for the following parts are available in LTspice:

LTM4603

LTM4603-1

LTM4603HV

Reference Designs (2)

Altera Cyclone III FPGA Starter Kit

Altera Nios II Embedded Evaluation Kit, Cyclone III Edition

Altera Cyclone III FPGA Starter Kit

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Altera Nios II Embedded Evaluation Kit, Cyclone III Edition

View Detailed Reference Design Information

Features & Benefits

Analog Devices has worked closely with FPGA and processor manufacturers to develop verified power solutions that optimize cost, size and efficiency in high performance applications
Our reference designs are supported by an intuitive design tool set and IP
Our team can provide designs for quick prototypes that can speed time to market in the most complex applications

Parts Used

Product Recommendations

LTM4603 Companion Parts

Recommended Related Parts

LTC4364, LTC2974, LTC2960.

Recommended Suggested Oscillator

LTC6908.

Design Resources

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.View our quality and reliability program and certifications for more information.

Part Number	Material Declaration	Reliability Data	Pin/Package Drawing	CAD Symbols, Footprints & 3D Models
LTM4603EV#PBF	Material Declaration	Reliability Data	118-Lead LGA (15mm x 15mm x 2.82mm)	Ultra Librarian SamacSys
LTM4603EV-1#PBF	Material Declaration	Reliability Data	118-Lead LGA (15mm x 15mm x 2.82mm)	Ultra Librarian SamacSys
LTM4603IV#PBF	Material Declaration	Reliability Data	118-Lead LGA (15mm x 15mm x 2.82mm)	Ultra Librarian SamacSys
LTM4603IV-1#PBF	Material Declaration	Reliability Data	118-Lead LGA (15mm x 15mm x 2.82mm)	Ultra Librarian SamacSys
Wafer Fabrication Data		R504 Reliability Data

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Evaluation Boards

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.