LTM4630 - Dual 18A or Single 36A DC/DC μModule (Power Module) Regulator

Features

  • Dual 18A or Single 36A Output
  • Wide Input Voltage Range: 4.5V to 15V
  • Output Voltage Range: 0.6V to 1.8V
  • ±1.5% Maximum Total DC Output Error Over Line, Load and Temperature
  • Differential Remote Sense Amplifier
  • Current Mode Control/Fast Transient Response
  • Adjustable Switching Frequency
  • Overcurrent Foldback Protection
  • Multiphase Parallel Current Sharing with Multiple LTM4630s Up to 144A
  • Frequency Synchronization
  • Internal Temperature Monitor
  • Pin Compatible with the LTM4620 and LTM4620A (Dual 13A, Single 26A) and LTM4628 (Dual 8A, Single 16A)
  • Selectable Burst Mode® Operation
  • Soft-Start/Voltage Tracking
  • Output Overvoltage Protection
  • 16mm × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm BGA Packages

Typical Application

LTM4630 Typical Application
LTM4630 Typical Application

Description

The LTM®4630 is a dual 18A or single 36A output switching mode step-down DC/DC μModule® (power module) regulator. 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 15V, the LTM4630 supports two outputs each with an output voltage range of 0.6V to 1.8V, 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 LTM4630 is pin compatible with the LTM4620 and LTM4620A (dual 13A, single 26A) and the LTM4628 (dual 8A, single 16A).

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 LTM4630 is offered in 16mm × 16mm × 4.41mm LGA and 16mm × 16mm × 5.01mm BGA packages. The LTM4630 is ROHS compliant.

  Features Vout
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

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprint compatible with Mentor Graphics PADS® v9.5 or later, and Cadence ORCAD® v16.5 or later.

For complete and up to date package information and drawings, please refer to our packaging page

Part Number Package Code Temp Package
Drawing
RoHS
LTM4630EV#PBF 16mm x 16mm x 4.41mm LGA LGA E 05-08-1901 Yes
LTM4630EY#PBF 16mm x 16mm x 5.01mm BGA BGA E 05-08-1969 Yes
LTM4630IV#PBF 16mm x 16mm x 4.41mm LGA LGA I 05-08-1901 Yes
LTM4630IY#PBF 16mm x 16mm x 5.01mm BGA BGA I 05-08-1969 Yes


LTM4630 Package Drawing
LTM4630 Package Drawing

Order Info

  • Part numbers ending in PBF are lead free. Solder plated terminal finish (SnPb) versions are non-standard and special terms and conditions and pricing applies if available. Please contact LTC marketing for information.
  • 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 Temp Price
(1-99)
Price
(1k)*
RoHS
LTM4630EV#PBF 16mm x 16mm x 4.41mm LGA E $50.07 $35.05 Yes
LTM4630EY#PBF 16mm x 16mm x 5.01mm BGA E $51.50 $36.05 Yes
LTM4630IV#PBF 16mm x 16mm x 4.41mm LGA I $55.07 $38.55 Yes
LTM4630IY#PBF 16mm x 16mm x 5.01mm BGA I $56.50 $39.55 Yes
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* 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.

Demo Boards

Linear Technology offers many demo boards free of charge to qualified customers. Contact your local sales office or distributor to inquire about 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
DC1892A LTM4630 Demo Board | Dual Buck µModule Regulator, 4.5V ≤ VIN ≤ 15V, Vout1 = 1.5V @ 18A, Vout2 = 1.0V @ 18A $65.00
DC2007A-A LTM4630 Demo Board | 70A Polyphase Step-Down (2x LTM4630), 4.5V ≤ VIN ≤ 15V, Vout = 0.9V to 1.8V @ 70A $105.00
DC2007A-B LTM4630 Demo Board | 105A Polyphase Step-Down (3x LTM4630), 4.5V ≤ VIN ≤ 15V, Vout = 0.9V to 1.8V @ 105A $135.00
DC2007A-C LTM4630 Demo Board | 140A Polyphase Step-Down (4x LTM4630), 4.5V ≤ VIN ≤ 15V, Vout = 0.9V to 1.8V @ 140A $165.00
DC2081A-A LTM4630EV Demo Board | Step-Down μModule Regulator, 4.5V ≤ VIN ≤ 15V, Vout = 1V @ 36A Contact Factory
DC2106B-B LTM4676AEY/LTM4630EV Demo Board | PMBus Buck µModule (LTM4676A) + LTM4630 (x3), 4.5V ≤ VIN ≤ 16V, Vout = 0.5V to 1.8V @ 130A $125.00
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Click here to view our complete list of demo boards

Applications

  • Telecom and Networking Equipment
  • Storage and ATCA Cards
  • Industrial Equipment

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Design Tools

LTpowerCAD

The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

To open the project file for this circuit:

Design tools for the following parts are available in LTpowerCAD:
LTM4630
LTM4630 Parallel
LTM4630-1
LTM4630-1 Parallel
LTM4630A
LTM4630A Parallel

LTspiceIV

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. Click here to download LTspice IV

To launch a ready to run LTspice demonstration circuit for this part:

To explore other ready to run LTspice demonstration circuits, please visit our Demo Circuits Collection.

Models for the following parts are available in LTspice IV:
LTM4630
LTM4630-1
LTM4630A

Technical Support