LTC3525ESC6-5#TRPBF

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.

Applications

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

Key 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