Linear Technology Introduces Two 400mA Synchronous Step-Up DC/DC Converters

August 03 06:02:26, 2018

Linear Technology Corporation has introduced two 400mA synchronous step-up DC/DC converters, the LTC3525-3.3 and the LTC3525-5. The device operates from an input voltage range of 1V to 4.5V. The LTC3525-3.3 provides a fixed 3.3V output and the LTC3525-5 provides a fixed 5V output. The LTC3525-3.3 is capable of delivering 140mA of continuous output current through two AA alkaline batteries. The LTC3525-5 provides a 5V output voltage and 175mA output current from a single 3V input.

Both LTC3525-3.3 and LTC3525-5 are said to use synchronous rectification to achieve 95% efficiency. Its Burst Mode operation reduces the quiescent current to 7Î¼A. The devices also feature RDS(ON) 0.5Î© (N-channel) and 0.8Î© (P-channel) internal switches, plus their adaptive power-controlled switching topology to provide loads from 1mA to 100mA. More than 90% efficiency.

Both devices provide output disconnect and inrush current limiting to reduce the inrush current on the input supply. Other features include anti-ringing control, short circuit protection and thermal protection. Because the devices are available in an SC70 package and require only three external components, the solution has a small footprint.

The LTC3525ESC6-3.3 and LTC3525ESC6-5 are available from stock in a 6-pin SC70 package and are available in 1,000-piece quantities for $1.75 each.
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