LTM8028 - 36VIN, UltraFast, Low Output Noise 5A μModule (Power Module) Regulator


  • High Performance 5A Linear Regulator with Switching Step-Down Converter for High Efficiency
  • Digitally Programmable VOUT: 0.8V to 1.8V
  • Input Voltage Range: 6V to 36V
  • Very Tight Tolerance Over Temperature, Line, Load and Transient Response
  • Low Output Noise: 40μVRMS (10Hz to 100kHz)
  • Parallel Multiple Devices for 10A or More
  • Accurate Programmable Current Limit to Allow Asymmetric Power Sharing
  • Analog Output Margining: ±10% Range
  • Synchronization Input
  • Stable with Low ESR Ceramic Output Capacitors
  • 15mm × 15mm × 4.92mm Surface Mount BGA Package
  • SnPb or RoHS Compliant Finish

Typical Application

LTM8028 Typical Application
LTM8028 Typical Application


The LTM®8028 is a 36VIN, 5A μModule® (power module) regulator, consisting of an UltraFast™ 5A linear regulator preceded by a high efficiency switching regulator. In addition to providing tight output regulation, the linear regulator automatically controls the output voltage of the switcher to provide optimal efficiency and headroom for dynamic response.

The output voltage is digitally selectable in 50mV increments over a 0.8V to 1.8V range. An analog margining function allows the user to adjust system output voltage over a continuous ±10% range, and a single-ended feedback sense line may be used to mitigate IR drops due to parasitic resistance.

The LTM8028 is packaged in a compact (15mm × 15mm × 4.92mm) overmolded ball grid array (BGA) package suitable for automated assembly by standard surface mount equipment. The LTM8028 is available with SnPb (BGA) or RoHS compliant terminal finish.


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
LTM8028EY#PBF 15mm x 15mm x 4.92mm BGA BGA E 05-08-1894 RoHS
LTM8028IY 15mm x 15mm x 4.92mm BGA BGA I 05-08-1894 RoHS
LTM8028IY#PBF 15mm x 15mm x 4.92mm BGA BGA I 05-08-1894 RoHS
LTM8028MPY 15mm x 15mm x 4.92mm BGA BGA MP 05-08-1894 RoHS
LTM8028MPY#PBF 15mm x 15mm x 4.92mm BGA BGA MP 05-08-1894 RoHS

LTM8028 Package Drawing

Order Info

Package Variations and Pricing

Part Number Package Temp Price
LTM8028EY#PBF 15mm x 15mm x 4.92mm BGA E $20.29 $14.20 View
LTM8028IY 15mm x 15mm x 4.92mm BGA I $35.35 $24.74 View
LTM8028IY#PBF 15mm x 15mm x 4.92mm BGA I $22.31 $15.62 View
LTM8028MPY 15mm x 15mm x 4.92mm BGA MP $53.60 $37.52 View
LTM8028MPY#PBF 15mm x 15mm x 4.92mm BGA MP $40.57 $28.40 View
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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
DC1738A LTM8028EY Demo Board | uModule Regulator with Low Noise LDO Post-Regulator, 6V ≤ VIN ≤ 36V, VOUT = 0.8V to 1.8V @ 5A $65.00
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