LTM4651 - EN55022B Compliant 58V, 24W Inverting-Output DC/DC μModule Regulator

Features

  • Complete Low EMI Switch Mode Power Supply
  • EN55022 Class B Compliant
  • Wide Input Voltage Range: 3.6V to 58V
  • Up to 4A Output Current
    • 24W Output from 12VIN to –24VOUT, PLOSS = 5W, TA = 60°C, tRISE = 60°C, 200LFM
  • Output Voltage Range: –26.5V ≤ VOUT– ≤ –0.5V
    • Safe Operating Area: VIN + |VOUT–| ≤ 58V n ±1.67% Total DC Output Voltage Error Over Line, Load and Temperature (–40°C to 125°C)
  • Parallel and Current Share with Multiple LTM4651s
  • Constant-Frequency Current Mode Control
  • Frequency Synchronization Range: 250kHz to 3MHz
  • Power Good Indicator and Programmable Soft-Start
  • Overcurrent/Overvoltage/Overtemperature Protection
  • 15mm × 9mm × 5.01mm BGA Package

Typical Application

LTM4651 Typical Application
LTM4651 Typical Application

Description

The LTM®4651 is an ultralow noise, 58V, 24W DC/DC μModule® inverting topology regulator. It regulates a negative output voltage (VOUT–) from a positive input supply voltage (VIN), and is designed to meet the radiated emissions requirements of EN55022. Conducted emission requirements can be met by adding standard filter components.

Included in the package are the switching controller, power MOSFETs, inductor, filters and support components. The LTM4651 can regulate VOUT– to a value between –0.5V and –26.5V, provided that its input and output voltages adhere to the safe operating area criteria of the LTM4651: VIN + |VOUT–| ≤ 58V. A switching frequency range of 250kHz to 3MHz is supported (400kHz default) and the module can synchronize to an external clock.

Despite being an inverting topology regulator, no level shift circuitry is needed to interface to the LTM4651’s RUN, PGOOD or CLKIN pins; those pins are referenced to GND.

The LTM4651 is offered in a 15mm × 9mm × 5.01mm BGA package with SnPb or RoHS compliant terminal finish.

Packaging

CAD Symbols and Footprints: The downloadable Zip file below contains the schematic symbol and PCB footprints.

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

Part Number Package Code Temp Package
Drawing
RoHS
LTM4651EY#PBF 15mm × 9mm × 5.01mm BGA BGA E 05-08-1826 Yes
LTM4651IY 15mm × 9mm × 5.01mm BGA BGA I 05-08-1826 No
LTM4651IY#PBF 15mm × 9mm × 5.01mm BGA BGA I 05-08-1826 Yes


LTM4651 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
LTM4651EY#PBF 15mm × 9mm × 5.01mm BGA E $21.07 $14.75 Yes
LTM4651IY 15mm × 9mm × 5.01mm BGA I $31.99 $22.39 No
LTM4651IY#PBF 15mm × 9mm × 5.01mm BGA I $23.19 $16.23 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
DC2328A LTM4651 Demo Board | EN55022B Compliant 58V, 24W Inverting-Output DC/DC μModule Regulator $65.00
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Click here to view our complete list of demo boards

Applications

  • Avionics, Industrial Control and Test Equipment
  • Video, Imaging and Instrumentation
  • 48V Telecom and Network Power Supplies
  • RF Systems

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Design Tools

LTspice

LTspice® software 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

Models for the following parts are available in LTspice:
LTM4651

Technical Support