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LTC3525
400mA Micropower Synchronous Step-Up DC/DC Converter with Output Disconnect
Overview
Features and Benefits
- 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
Product Details
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
Product Categories
Product Lifecycle
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.
Evaluation Kits (2)
Documentation
Reliability Data (2)
User Guides (1)
Tools & Simulations
LTspice
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LTspice Simulations
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Reference Materials
Technical Articles (1)
Design Resources
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Support & Discussions
LTC3525 Discussions
Sample & Buy
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