Features and Benefits

  • VOUT Connected to VIN in Shutdown
  • Up to 95% Efficiency
  • 0.85V Minimum Input Start-Up Voltage
  • Fixed Output Voltage of 3.3V
  • Delivers 60mA at 3.3V from a 1V Input, or 140mA at 3.3V from a 1.8V Input
  • Burst Mode® Operation: IQ = 7μA
  • VIN Range: 0.5V to 4.5V
  • Only Three External Components
  • VIN > VOUT Operation
  • Anti-Ringing Control
  • Short-Circuit and Overtemperature Protection
  • Very Low Profile of 1mm
  • Tiny 6-Lead SC70 Package

Product Details

The LTC3525D-3.3 is a high efficiency synchronous stepup DC/DC converter that can start up with an input as low as 0.85V. It offers a compact, high efficiency alternative to charge pumps in single cell or dual cell alkaline or Li-Ion applications. Only three small external components are required. The LTC3525D features a fixed output voltage of 3.3V. In shutdown, VOUT is connected to VIN through the inductor.

The device includes a 0.5Ω N-channel MOSFET switch and a 0.8Ω P-channel synchronous rectifier. Peak switch current ranges from 150mA to 400mA, depending on load, providing enhanced efficiency. Quiescent current is an ultralow 7μA, maximizing battery life in portable applications.

Other features include anti-ringing control and thermal shutdown. The LTC3525D is available in a tiny 6-Lead SC70 package.

List of LTC3525 Options
LTC3525-3 0.85V 3V Output Disconnect
LTC3525-3.3 0.85V 3.3V Output Disconnect
LTC3525-5 0.85V 5V Output Disconnect
LTC3525D-3.3 0.85V 3.3V Pass Through Mode
LTC3525L-3 0.7V 3V Output Disconnect


  • MP3 Players
  • Portable Instruments
  • Glucose Meters
  • Digital Cameras

Product Lifecycle icon-recommended Recommended for New Designs

This product has been released to the market. The data sheet contains all final specifications and operating conditions. For new designs, ADI recommends utilization of these products.

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Pricing displayed is based on 1-piece. The USA list pricing shown is for budgetary use only, shown in United States dollars (FOB USA per unit), and is subject to change. International prices may vary due to local duties, taxes, fees and exchange rates.