LTM4603 - 6A DC/DC µModule with PLL, Output Tracking and Margining
Features
- 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
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.
Packaging
CAD Symbols and Footprints: The file below contains the schematic symbol and PCB footprint which can be converted for use with most popular CAD tools. Download and install the free Ultra Librarian Reader (72Mb) to convert the .bxl file to the format appropriate for your CAD tool
- LTM4603EV Symbol and Footprint
- LTM4603IV Symbol and Footprint
- LTM4603EV-1 Symbol and Footprint
- LTM4603IV-1 Symbol and Footprint
For complete and up to date package information and drawings, please refer to our packaging page
15mm x 15mm x 2.8mm LGA
Order Info
- Part numbers ending in PBF are lead free. Please contact LTC marketing for information on lead based finish parts.
- Part numbers containing TR or TRM are shipped in tape and reel or 500 unit mini tape and reel, respectively
- Please refer to our general ordering information or the product datasheet for more details
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 |
| Buy Now • Request Samples | ||||||
Demo Boards
Linear Technology demo boards are offered free of charge to qualified customers. Contact your local sales office or distributor to request a demo board. Certain demo boards are also available for sale via credit card on this website. Demo boards are for evaluation purposes only. It remains the customer’s responsibility to verify proper and reliable operation in the actual end application.| Part Number | Description | Price | Documentation |
|---|---|---|---|
| DC1083A-A | LTM4603 Demo Board | $65.00 | |
| Buy Now | |||
Applications
- Telecom and Networking Equipment
- Servers
- Industrial Equipment
- Point of Load Regulation
Simulate
LTspice IV is a powerful, fast and free simulation tool, schematic capture and waveform viewer with enhancements and models for improving the simulation of switching regulators. To download LTspice IV and other FREE simulation tools, please visit our Design Simulation page.
To launch a ready to run LTspice demonstration circuit for this part:
- Step 1: If you have not installed LTspice on this computer, download and install LTspice IV
- Step 2: Once LTspice is installed, click on the link(s) below to launch the simulation
- Step 3: If LTspice IV does not automatically open after clicking the link above, 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
To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.
Related models available in LTspice IV
LTM4603-1
LTM4603
LTM4603HV
Technical Support
- For immediate technical assistance, contact your local sales office or distributor or call 1-800-4-LINEAR (US customers only) or 408-432-1900.
- For less urgent requests, please complete our Technical Support Request Form. Please allow 2-3 business days for reply.
