Step-Down Converters Operate From 2.25V to 5.5V Input Supply



The LTC3315A features dual 2A monolithic synchronous step-down converters operating from a 2.25V to 5.5V input supply in one package for space-constrained applications with demanding performance requirements. Using constant frequency, peak current mode control at switching frequencies up to 3MHz with a minimum on-time as low as 25ns, both bucks achieve high efficiency and fast transient response in a very small application footprint.

The LTC3315A operates in forced continuous or pulse skip mode for low noise or in Burst Mode operation for high efficiency at light loads. The common buck switching frequency is 2MHz and can be synchronized to an external oscillator via the MODE/SYNC pin.

The LTC3315A can regulate outputs as low as 500mV. Other features include precision enable thresholds, a PGOOD signal, output overvoltage protection, thermal shutdown, output short-circuit protection, and up to 100% duty cycle operation for low dropout. The LTC3315A is available in a compact 2mm × 2mm LQFN package.


  • Servers, Telecom Supplies, Optical Networking
  • Distributed DC Power Systems (POL)
  • FPGA, ASIC, µP Core Supplies
  • Industrial/Automotive/Communications

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