LTM8042/LTM8042-1 - μModule (Power Module) Boost LED Driver and Current Source


  • True Color PWM™ with 3000:1 Dimming Ratio
  • Operates in Boost, Buck Mode or Buck-Boost Mode
  • Wide Input Voltage Range:
    Operation from 3V to 30V
    Transient Protection to 40V
  • Gate Driver for Optional PWM Dimming with P-channel MOSFET
  • Adjustable Frequency: 250kHz to 2MHz
  • Constant-Current and Constant-Voltage Regulation
  • Low Shutdown Current: <1μA
  • RoHS Compliant Package with Gold Pad Finish
  • Tiny, Low Profile (9mm × 15mm × 2.82mm) Surface Mount LGA Package

Typical Application

LTM8042 Typical Application
LTM8042 Typical Application


The LTM8042 is a complete μModule (power module) Boost LED Driver specifically designed to drive LEDs up to 1A, while the LTM8042-1 drives up to 350mA. It combines a boost power topology with a unique current loop to operate as a constant-current source. The PWM input provides as much as 3000:1 LED dimming, while 10:1 analog dimming can be accomplished by a single resistor or analog voltage applied to the CTL pin. As with any boost topology, the LTM8042/LTM8042-1 has an uninterrupted current path between its input and output and is thus intolerant to a short-circuit or overload from the output to ground.

The LTM8042/LTM8042-1 is packaged in a thermally enhanced, compact overmolded land grid array (LGA) package. The LTM8042/LTM8042-1 is Pb-free and a RoHS compliant.


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
LTM8042EV-1#PBF 15mm x 9mm x 2.82mm LGA LGA E 05-08-1859 Yes
LTM8042EV#PBF 15mm x 9mm x 2.82mm LGA LGA E 05-08-1859 Yes
LTM8042IV-1#PBF 15mm x 9mm x 2.82mm LGA LGA I 05-08-1859 Yes
LTM8042IV#PBF 15mm x 9mm x 2.82mm LGA LGA I 05-08-1859 Yes

LTM8042 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
LTM8042EV-1#PBF 15mm x 9mm x 2.82mm LGA E $12.51 $8.76 Yes
LTM8042EV#PBF 15mm x 9mm x 2.82mm LGA E $12.51 $8.76 Yes
LTM8042IV-1#PBF 15mm x 9mm x 2.82mm LGA I $13.39 $9.37 Yes
LTM8042IV#PBF 15mm x 9mm x 2.82mm LGA I $13.39 $9.37 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
DC1511A-A LTM8042EV Demo Board | uModule Boost LED Driver, 3V ≤ VIN ≤ 30V, Vout up to 32V @ 1A $65.00
DC1511A-B LTM8042EV-1 Demo Board | uModule Boost LED Driver, 3V ≤ VIN ≤ 30V, Vout up to 32V @ 350mA $65.00
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Click here to view our complete list of demo boards


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