LTC3525
Info : RECOMMENDED FOR NEW DESIGNS
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LTC3525

400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect

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Info : RECOMMENDED FOR NEW DESIGNS tooltip
Info : RECOMMENDED FOR NEW DESIGNS tooltip
Part Details
Part Models 12
1ku List Price Starting From $2.15
Features
  • Up to 95% Efficiency
  • Output Disconnect and Inrush Current Limit
  • Fixed Output Voltages of 3V, 3.3V or 5V
  • Delivers 65mA at 3V from a 1V Input
  • Delivers 60mA at 3.3V from a 1V Input, or 140mA at 3.3V from a 1.8V Input
  • Delivers 175mA at 5V from a 3V Input
  • Burst Mode® Operation: IQ = 7μA
  • Only Three External Components
  • VIN > VOUT Operation
  • <1μA Shutdown Current
  • Antiringing Control
  • Short-Circuit and Overtemperature Protection
  • Very Low Profile of 1mm
  • Tiny 6-Lead SC70 Package
Additional Details
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The LTC3525-3/LTC3525-3.3/LTC3525-5 are high efficiency synchronous step-up DC/DC converters with output disconnect that can start up with an input as low as 0.85V. They offer 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 LTC3525 is offered in fixed output voltages of 3V, 3.3V or 5V.

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 <1μA shutdown current, antiringing control and thermal shutdown. The LTC3525 is available in a tiny 6-Lead SC70 package.

List of LTC3525 Options
PART NAME
INPUT START-UP VOLTAGE  OUTPUT VOLTAGE VOUT STATUS IN SHUTDOWN MODE 
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 

Applications

  • MP3 Players
  • Portable Instruments
  • Glucose Meters
  • Digital Cameras
Part Models 12
1ku List Price Starting From $2.15

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
LTC3525ESC6-3#TRMPBF
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LTC3525ESC6-3#TRPBF
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LTC3525ESC6-3.3#TRMPBF
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LTC3525ESC6-3.3#TRPBF
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LTC3525ESC6-5#TRMPBF
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LTC3525ESC6-5#TRPBF
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LTC3525ISC6-3#TRMPBF
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LTC3525ISC6-3#TRPBF
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LTC3525ISC6-3.3#TRMPBF
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LTC3525ISC6-3.3#TRPBF
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LTC3525ISC6-5#TRMPBF
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LTC3525ISC6-5#TRPBF
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Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 2

reference details image

DC879A-B

LTC3525-5 Demo Board | Micropower Synchronous Step-Up, 1V to 4.5VIN, 5VOUT @ 175mA

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DC879A-B

LTC3525-5 Demo Board | Micropower Synchronous Step-Up, 1V to 4.5VIN, 5VOUT @ 175mA

LTC3525-5 Demo Board | Micropower Synchronous Step-Up, 1V to 4.5VIN, 5VOUT @ 175mA

Product Detail

Demonstration circuit 879 is a Micropower Synchronous Step-Up Converter with Output Disconnect featuring the LTC3525-3.3 and LTC3525-5. The LTC3525 is a high performance Burst Mode operation only, synchronous boost converter. The LTC3525 incorporates a feature that maximizes efficiency by adjusting the peak and valley of the inductor current as a function of load. The demo board has two assembly versions: DC879A-A and DC879A-B. The DC879A-A offers fixed 3.3V output. The DC879A-B offers fixed 5V output. They offer a compact, high efficiency solution in single cell or dual cell alkaline or Li-ion applications. Only three small external components are required.

reference details image

DC879A-A

LTC3525-3.3 Demo Board | Micropower Synchronous Step-Up, 1V to 3.2VIN, 3.3VOUT @ 140mA

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DC879A-A

LTC3525-3.3 Demo Board | Micropower Synchronous Step-Up, 1V to 3.2VIN, 3.3VOUT @ 140mA

LTC3525-3.3 Demo Board | Micropower Synchronous Step-Up, 1V to 3.2VIN, 3.3VOUT @ 140mA

Product Detail

Demonstration circuit 879 is a Micropower Synchronous Step-Up Converter with Output Disconnect featuring the LTC3525-3.3 and LTC3525-5. The LTC3525 is a high performance Burst Mode operation only, synchronous boost converter. The LTC3525 incorporates a feature that maximizes efficiency by adjusting the peak and valley of the inductor current as a function of load. The demo board has two assembly versions: DC879A-A and DC879A-B. The DC879A-A offers fixed 3.3V output. The DC879A-B offers fixed 5V output. They offer a compact, high efficiency solution in single cell or dual cell alkaline or Li-ion applications. Only three small external components are required.

Tools & Simulations

Tools & Simulations 1

LTspice® is a powerful, fast and free simulation software, schematic capture and waveform viewer with enhancements and models for improving the simulation of analog circuits.

To launch ready-to-run LTspice demonstration circuits for this part:

Step 1: Download and install LTspice on your computer.

Step 2: Click on the link in the section below to download a demonstration circuit.

Step 3: If LTspice does not automatically open after clicking the link below, you can instead run the simulation by right clicking on the link and selecting “Save Target As.” After saving the file to your computer, start LTspice and open the demonstration circuit by selecting ‘Open’ from the ‘File’ menu.

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