1. Skip to navigation
  2. Skip to content
  3. Skip to sidebar
Media Contacts

Deutsch  |  Français  |  Italiano  |   简体中文  |  繁體中文  |  日本語  |  한국어

15V Input & Output, 1.5A Monolithic Synchronous Buck-Boost DC/DC Converter Features 95% Efficiency & Low Noise Operation

MILPITAS, CA - January 22, 2014 - Linear Technology announces the LTC3111, a synchronous buck-boost converter that delivers up to 1.5A of output current from a wide range of power sources, including single or multiple cell batteries, supercapacitor stacks and wall adapters. The device’s 2.5V to 15V input and output voltage range provides a regulated output from inputs above, below or equal to the regulated output. The low noise buck-boost topology incorporated into the LTC3111 delivers a continuous, jitter-free transition between buck and boost modes, making it ideal for RF and other noise-sensitive applications that must maintain a low-noise, constant output voltage with a variable input power source.

In many applications, battery run time is significantly extended over step-down only solutions. The LTC3111’s default 800kHz switching frequency can be synchronized to an external 600KHz to 1.5MHz clock, and its proprietary third-generation buck-boost PWM circuitry ensures low noise and high efficiency while minimizing the size of external components. The combination of tiny externals and a 3mm x 4mm DFN or MSOP-16E package provides a compact solution footprint.

The LTC3111 includes four internal low RDS(ON) N-channel MOSFETs and uses a single inductor to deliver efficiencies of up to 95%. User-selectable Burst Mode® operation lowers quiescent current to only 49µA, improving light load efficiency and further extending battery run time. For noise-sensitive applications, Burst Mode operation can be disabled. Other features include soft-start, overvoltage protection, short-circuit protection, thermal shutdown and output disconnect.

The LTC3111EDE is available in a 14-lead 3mm x 4mm DFN package and the LTC3111EMSE is offered in a thermally enhanced 16-lead MSOP package. Pricing starts at $3.50 each and $3.60 each, respectively. Industrial grade versions, the LTC3111IDE and LTC3111IMSE, are guaranteed to operate over the -40°C to 125°C operating junction temperature range and are priced starting at $3.85 each and $3.96 each, respectively. High temperature grade versions, the LTC3111HDE and LTC3111HMSE, are guaranteed to operate over the -40°C to 150°C operating junction temperature range and are priced starting at $4.16 each and $4.21 each, respectively. Finally, High reliability grade versions, the LTC3111MPDE and LTC3111MPMSE, are guaranteed to operate over the -55°C to 150°C operating junction temperature range and are priced starting at $10.40 each and $10.69 each, respectively. All pricing is for 1,000 piece quantities and all versions are available from stock. For more information, visit www.linear.com/product/LTC3111.

Summary of Features: LTC3111

  • 15V, 1.5A, Synchronous Buck-Boost Regulator
  • Regulated Output with VIN Above, Below or Equal to VOUT
  • 2.5V to 15V Input & Output Voltage Range
  • 1.5A Continuous Output Current:
    VIN ≥ 5V, VOUT = 5V, PWM Mode
  • Single Inductor
  • Accurate RUN Threshold
  • Up to 95% Efficiency
  • 800kHz Switching Frequency, Synchronizable Between 600kHz & 1.5MHz
  • 49µA No-Load Quiescent Current in Burst Mode® Operation
  • Output Disconnect in Shutdown
  • Shutdown Current < 1µA
  • Internal Soft-Start
  • Small, Thermally Enhanced 14-Lead (3mm × 4mm × 0.75mm) DFN &
    16-Lead MSOP Packages
 

1.5A, 15V Synchronous Buck-Boost DC/DC
Converter Offers Extended Battery Run Time


LTC3111 PR Image

Click Photo for High-Res Image