Features and Benefits

  • 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
  • ±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

Product Details

The LTM4651 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.


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

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

Evaluation Kits (1)

Tools & Simulations


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.


Models for the following parts are available in LTspice:


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.

PCN-PDN Information

Sample & Buy

Ordering FAQs

See our Ordering FAQs for answers to questions about online orders, payment options and more.


Buy Now Pricing

(**) Displayed Buy Now Price and Price Range is based on small quantity orders.


List Pricing

(*)The 1Ku 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 Analog Devices, Inc. authorized distributor. Pricing displayed for Evaluation Boards and Kits is based on 1-piece pricing.



Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Price Table Help


Evaluation Boards

Pricing displayed is based on 1-piece.

Up to two boards can be purchased through Analog.com. To order more than two, please purchase through one of our listed distributors.

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.