LTC3529 - 1.5A, 1.5MHz Step-Up DC/DC Converter in 2mm × 3mm DFN


  • Compact Solution for 5V USB On-The-Go VBUS Power
  • 5V at 500mA from Single Li-Ion Cell
  • Automatic Fault Detection
  • High Efficiency: Up to 95%
  • VIN Range: 1.8V to 5.25V
  • Fixed 5V Output
  • Short Circuit Protection
  • 1.5MHz Low Noise, Fixed Frequency PWM
  • Inrush Current Limiting and Internal Soft-Start
  • Output Disconnect
  • <1μA Quiescent Current in Shutdown
  • VIN > VOUT Operation
  • 8-Lead, 2mm × 3mm DFN Package

Typical Application

LTC3529 Typical Application
LTC3529 Typical Application


The LTC3529 is a 5V output, synchronous, fixed frequency step-up DC/DC converter optimized for USB On-The-Go (OTG) hosting applications. This compact USB OTG 5V VBUS converter features a 1.5MHz switching frequency, internal compensation and a tiny 2mm × 3mm DFN package. The LTC3529 can operate from input voltages as low as 1.8V.

 USB OTG-specific features include a fault fl ag with 22ms deglitching to indicate when the bus is overloaded, output disconnect and short circuit protection. Following a fault, the LTC3529 can be programmed to either latch-off or restart after a time-out duration.

Additional features include a <1μA shutdown mode, soft-start, inrush current limiting and thermal overload protection. Anti-ring circuitry reduces EMI during low power operation. The LTC3529 is offered in an 8-Lead 2mm × 3mm × 0.75mm DFN package.


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
LTC3529EDCB#PBF 2x3 DFN-8 DCB E 05-08-1718 Yes
LTC3529EDCB#TRMPBF 2x3 DFN-8 DCB E 05-08-1718 Yes
LTC3529EDCB#TRPBF 2x3 DFN-8 DCB E 05-08-1718 Yes

LTC3529 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
LTC3529EDCB#PBF 2x3 DFN-8 E $2.93 Yes
LTC3529EDCB#TRMPBF 2x3 DFN-8 E $2.93 $2.10 Yes
LTC3529EDCB#TRPBF 2x3 DFN-8 E $2.93 $2.05 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
DC1226A LTC3529EDCB Demoboard | 1.5A, 2.35MHz Step-Up DC/DC Converter in 2mm x 3mm DFN Contact Factory
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Click here to view our complete list of demo boards


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