LTC3525-5 Datasheet

• Up to 95% Efficiency
• Output Disconnect and Inrush Current Limit
• Fixed Output Voltages of 5V
• Delivers 175mA at 5V from a 3V Input
• Burst Mode^® Operation: I_Q = 7μA
• Only Three External Components
• V_IN > V_OUT Operation
• <1μA Shutdown Current
• Antiringing Control
• Short-Circuit and Overtemperature Protection
• Very Low Profile of 1mm
• Tiny 6-Lead SC70 Package

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

The 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 LTC3525-5 is offered in fixed output voltages of 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 LTC3525-5 is available in a tiny 6-Lead SC70 package.