Low Noise Bias Generator in 2mm x 2mm DFN

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

The LT3048-15 delivers up to 40mA of continuous output current at 15V with output ripple and noise less than 500µVPK-PK and 0.1% load regulation. The device operates from an input voltage range of 2.7V to 4.8V, making it suitable for single-cell Li-Ion batteries or 3.3V 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.