LTM4623 - Ultrathin 20VIN, 3A Step-Down DC/DC μModule (Power Module) Regulator
Datasheet Documentation
Reliability Data
Product Selector Card
Demo Board Manual
Press Release


Typical Application

LTM4623 Typical Application
LTM4623 Typical Application


The LTM®4623 is a complete 3A step-down switching mode μModule (power module) regulator in a tiny ultrathin 6.25mm × 6.25mm × 1.82mm LGA and 6.25mm × 6.25mm × 2.42mm BGA packages. Included in the package are the switching controller, power FETs, inductor and support components. Operating over an input voltage range of 4V to 20V or 2.375V to 20V with an external bias supply, the LTM4623 supports an output voltage range of 0.6V to 5.5V, set by a single external resistor. Its high efficiency design delivers 3A continuous output current. Only ceramic input and output capacitors are needed.

The LTM4623 supports selectable discontinuous mode operation and output voltage tracking for supply rail sequencing. Its high switching frequency and current mode control enable a very fast transient response to line and load changes without sacrificing stability.

Fault protection features include overvoltage, overcurrent and overtemperature protection.

The LTM4623 is available with SnPb (BGA) or RoHS compliant terminal finish.


6.25mm x 6.25mm x 1.82mm LGA,6.25mm x 6.25mm x 2.42mm BGA

LTM4623 Package Drawing
Order Info

Package Variations and Pricing

Part Number Package Pins Temp Price
LTM4623IV#PBF LGA 25 I $9.50 $6.65
LTM4623IY#PBF BGA 25 I $10.00 $7.00
LTM4623IY BGA 25 I $13.36 $9.35
LTM4623EV#PBF LGA 25 E $8.64 $6.05
LTM4623EY#PBF BGA 25 E $9.14 $6.40
* 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
DC2171A-A LTM4623 Demo Board | Step-Down μModule Regulator, 4V ≤ VIN ≤ 20V, Vout = 1.0/1.2/1.5/1.8/2.5/3.3/5V @ 3A $65.00
DC2721A-A LTM4623EY Demo Board | 20Vin, 3A Step-Down µModule Regulator Configured as Inverting Output. -0.9Vout to -5.2Vout $65.00