Low Noise Bias Generator In 2mm x 2mm DFN

The LT3048 from Linear Technology Corporation is 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 40mA 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 V to 4.8 V, making it suitable for single-cell Li-Ion batteries or 3.3 V logic rails. Its constant switching frequency of 2.2 MHz enables the use of tiny externals. Combined with a 2 mm x 2 mm 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 2.2 MHz constant frequency operation delivers a low ripple output to the LDO, delivering 15V with ultralow output ripple and noise of less than 500 µVPK-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 2 mm x 2 mm 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.