LT3048Linear Technology Corporation announces the LT3048, a step-up DC/DC converter with an integrated LDO output that delivers a low noise, low ripple 15 V bias supply. The LT3048-15 delivers up to 40 mA of continuous output current at 15 V with output ripple and noise less than 500 µVPK-PK and 0.1 % load regulation.

The device operates from an input voltage range of 2.7 to 4.8 V, making it suitable for single-cell Li-Ion batteries or 3.3 V logic rails. Its constant switching frequency of 2.2MHz enables the use of tiny externals. Combined with a 2mm x 2mm DFN package and an integrated Schottky diode, the LT3048-15 offers a simple, compact solution footprint for low noise biasing applications.

The LT3048-15’s internal high efficiency switch and 2.2MHz constant frequency operation delivers a low ripple output to the LDO, delivering 15V with ultralow output ripple and noise of less than 500µVPK-PK. Its current-mode control enables fast transient response without the need for complex external compensation. To further enhance system reliability, the LT3048-15 offers short-circuit and thermal protection as well as load disconnect in shutdown.

The LT3048EDC-15 is available in a 2mm x 2mm DFN-8 package, priced at $1.65 each for 1,000 piece quantities. An industrial temperature (-40°C to 125°C) version, the LT3048IDC-15, is priced at $1.82 each for 1,000 piece quantities. Both versions are available from stock. For more information, visit

Summary of Features: LT3048-15

  • Generates Low Noise Bias Voltage from Single-Cell Li-Ion Battery
  • Output Current: Up to 40mA
  • Low Output Ripple & Noise: <500µVP-P
  • Boost Regulator
  • 2.2MHz Operation
  • 300mA Power Switch
  • Integrated Schottky Diode
  • Low Dropout Linear Regulator
  • Low Noise: <120µVRMS (10Hz to 100kHz)
  • 0.1% Load Regulation
  • Short-Circuit & Thermal Protection
  • Load Disconnect in Shutdown
  • Available in 2mm x 2mm DFN Package