Analog Devices Inc. LTC3310S Synchronous Step-Down Silent Switcher® 2

Analog Devices Inc. LTC3310S Synchronous Step-Down Silent Switcher® 2 DC-DC Converter is capable of providing up to 10A of output current from a 2.25V to 5.5V input supply. The Silent Switcher 2 architecture combined with internal hot loop bypass capacitors achieve both low EMI and high efficiency at switching frequencies as high as 5MHz. Multi-phasing parallel converters are readily implemented for systems with higher power requirements.

The LTC3310S uses a constant-frequency, peak current mode control architecture for fast transient response. A 500mV reference allows for low voltage outputs, and 100% duty cycle operation delivers low drop out. Other features include a power good signal when the output is in regulation, precision enable threshold, output overvoltage protection, thermal shutdown, a temperature monitor, clock synchronization, mode selection, and output short circuit protection.

The LTC3310S Synchronous Step-Down Silent Switcher DC/DC Converter is available in a compact 18-lead 3mm x 3mm LQFN package.


  • Silent Switcher®2 architecture with ultralow EMI emissions
  • High efficiency of 4.5mΩ NMOS and 16mΩ PMOS
  • Wide bandwidth, fast transient response
  • Safely tolerates inductor saturation in overload
  • VIN Range of 2.25V to 5.5V
  • VOUT Range of 0.5V to VIN
  • VOUT Accuracy of ±1%
  • Peak current mode control
  • 35ns Minimum on-time
  • Programmable frequency to 5MHz
  • Shutdown current of 1µA
  • Precision 400mV enable threshold
  • Output soft-start with voltage tracking
  • Power good output
  • Die temperature monitor
  • Configurable for paralleling power stages
  • Thermally-enhanced 3mm × 3mm LQFN-18 package


  • Automotive/industrial/communications
  • Servers, telecom power supplies
  • Distributed DC Power Systems (POL)
  • FPGA, ASIC, µP core supplies


Application Circuit Diagram - Analog Devices Inc. LTC3310S Synchronous Step-Down Silent Switcher® 2
Published: 2020-02-04 | Updated: 2023-01-21