LTC3525D-3.3
RECOMMENDED FOR NEW DESIGNS400mA Micropower Synchronous Step-Up DC/DC Converter with Pass Through Mode
- Part Models
- 4
- 1ku List Price
- Starting From $2.78
Overview
- 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
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 | |||
| 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
Documentation
Data Sheet 1
User Guide 1
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| LTC3525DESC6-3.3#TRMPBF | 6-Lead SC70 | ||
| LTC3525DESC6-3.3#TRPBF | 6-Lead SC70 | ||
| LTC3525DISC6-3.3#TRMPBF | 6-Lead SC70 | ||
| LTC3525DISC6-3.3#TRPBF | 6-Lead SC70 |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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Request a Driver/SoftwareTools & Simulations
LTspice
Models for the following parts are available in LTspice:
- LTC3525-3
- LTC3525-3.3
- LTC3525-5
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.
Evaluation Kits
LTC3525-3.3 Demo Board | Micropower Synchronous Step-Up, 1V to 3.2VIN, 3.3VOUT @ 140mA
Resources
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