LTM8029 - 36VIN, 600mA Step-Down μModule (Power Module) Converter with 5μA Quiescent Current


  • Complete Switch Mode Power Supply
  • Low Quiescent Current Burst Mode® Operation
  • 5μA IQ at 12VIN to 3.3VOUT
  • 600mA Output Current
  • Wide Input Voltage Range: 4.5V to 36V (40VMAX)
  • Output Voltage: 1.2V to 18V
  • Excellent Dropout Performance
  • Can Be Used As an Inverter
  • Adjustable Switching Frequency: 200kHz to 2.2MHz
  • Current Mode Control
  • SnPb or RoHS Compliant Finish
  • Tiny, Low Profile (11.25mm × 6.25mm × 3.42mm) Surface Mount BGA Package

Typical Application

LTM8029 Typical Application
LTM8029 Typical Application


The LTM®8029 is a 36VIN, 600mA step-down μModule® (power module) converter with 5μA quiescent current. It is an adjustable frequency buck switching regulator that consumes only 5μA of quiescent current. The LTM8029 can accept an input as high as 36VIN and operates at low input voltages due to its off-time skipping capability. Burst Mode operation maintains high efficiency at low output currents while keeping the output ripple low. The RUN pin features an accurate threshold and the shutdown current is 0.9μA. A power good flag signals when VOUT reaches 90% of the programmed output voltage.

The LTM8029 is packaged in a thermally enhanced, compact (11.25mm × 6.25mm) and low profile (3.42mm) overmolded ball grid array (BGA) package. The LTM8029 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 footprints.

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

Part Number Package Code Temp Package
LTM8029EY#PBF 11.25mm x 6.25mm 3.42mm BGA BGA E 05-08-1878 Yes
LTM8029IY 11.25mm x 6.25mm 3.42mm BGA BGA I 05-08-1878 No
LTM8029IY#PBF 11.25mm x 6.25mm 3.42mm BGA BGA I 05-08-1878 Yes
LTM8029MPY 11.25mm x 6.25mm 3.42mm BGA BGA MP 05-08-1878 No
LTM8029MPY#PBF 11.25mm x 6.25mm 3.42mm BGA BGA MP 05-08-1878 Yes

LTM8029 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
LTM8029EY#PBF 11.25mm x 6.25mm 3.42mm BGA E $9.43 $6.60 Yes
LTM8029IY 11.25mm x 6.25mm 3.42mm BGA I $14.42 $10.06 No
LTM8029IY#PBF 11.25mm x 6.25mm 3.42mm BGA I $10.37 $7.26 Yes
LTM8029MPY 11.25mm x 6.25mm 3.42mm BGA MP $23.28 $16.30 No
LTM8029MPY#PBF 11.25mm x 6.25mm 3.42mm BGA MP $19.29 $13.50 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
DC1724A LTM8029 Demo Board | µModule Regulator, 5.6V ≤ VIN ≤ 36V, VOUT = 5V @ 600mA $65.00
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Click here to view our complete list of demo boards


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Design Tools


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

To launch a ready to run LTspice demonstration circuit for this part:

  • Step 1: If you have not installed LTspice on this computer, download and install LTspice
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Models for the following parts are available in LTspice:


The LTpowerCAD design tool is a complete power supply design tool program that can significantly ease the tasks of power supply design. It guides users to a solution, selects power stage components, provides detailed power efficiency, shows quick loop bode plot stability and load transient analysis, and can export a final design to LTspice for simulation. Click here to download LTpowerCAD

Design tools for the following parts are available in LTpowerCAD:

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