LTM4651 - EN55022B Compliant 58V, 24W Inverting-Output DC/DC μModule Regulator
Datasheet Documentation
Reliability Data
Press Release


Typical Application

LTM4651 Typical Application
LTM4651 Typical Application


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.


15mm × 9mm × 5.01mm BGA

LTM4651 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
LTM4651IY BGA 77 I $31.99 $22.39
LTM4651EY#PBF BGA 77 E $21.07 $14.75
LTM4651IY#PBF BGA 77 I $23.19 $16.23
* 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