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LTM4603 - 6A DC/DC µModule with PLL, Output Tracking and Margining

Features

uModule Packaging, Assembly and Thermal Performance
  • For samples contact your local sales office.
  • Click Here for LTM4603 Evaluation Kits
  • 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 5VIN, 3.3VOUT
  • Programmable Soft-Start
  • Output Overvoltage Protection
  • Small Footprint, Low Profile (15mm × 15mm × 2.8mm) Surface Mount LGA Package

Typical Application

LTM4603
LTM4603
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Description

The LTM4603 is a complete 6A step-down switch mode DC/DC power supply with onboard 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 onboard remote sense amplifier can be used to accurately regulate an output voltage independent of load current. The onboard remote sense amplifier is not available in the LTM4603-1. The LTM4603/LTM4603-1 are pin compatible with the 12A LTM4601/LTM4601-1.

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Packaging

15mm x 15mm x 2.8mm LGA

LTM4603
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Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price (1-99) Price (1k)* RoHS Data
LTM4603EV#PBF LGA 118 E $20.49 $13.50 View
LTM4603EV-1#PBF LGA 118 E $19.66 $12.95 View
LTM4603HVEV#PBF LGA 118 E $24.99 $16.47 View
LTM4603HVIV#PBF LGA 118 I $26.38 $17.38 View
LTM4603IV#PBF LGA 118 I $22.54 $14.85 View
LTM4603IV-1#PBF LGA 118 I $21.63 $14.25 View
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Request 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.

Evaluation Kits

Part Number Description Price
DC1083A-A LTM4603 Demo Board $65.00
DC1083A-B LTM4603HVEV Demo Board $65.00
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Applications

  • Telecom and Networking Equipment
  • Servers
  • Industrial Equipment
  • Point of Load Regulation
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Simulate

LTSpice / SwitcherCAD III is a powerful FREE circuit simulator and schematic capture program, providing macro models for 80% of Linear Technology's switching regulators, over 200 op amp models, as well as resistors, transistors and MOSFET models.

  • Step 1. If you do not already have a copy of LTSpice, click here to download and install LTSpice / SwitcherCAD III

  • Step 2. Once LTSpice is installed, click here for a ready to run  demonstration circuit of the LTM4603 or run  demonstration circuit of the LTM4603-1.

  • Step 3. If LTspice / SwitcherCAD III does not automatically open after clicking the above link, 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 demonstartion circuit by selecting "Open" from the "File" menu.
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