Three LDOs in one keep wireless chipsets supplied

Edited by the Electronicstalk editorial team Aug 3, 2004

The AQ9107 is a low-noise triple-output regulator IC, supplying the power management needs of wireless chipsets.

The AQ9107 is a low-noise triple-output regulator IC, supplying the power management needs of wireless chipsets.

The input voltage range is 3.0 to 3.6V.

The low dropout (LDO) outputs include: a regulated 1.8V (LDO1), with up to 500mA, for the baseband processor/MAC; a 2.84V (LDO2), with up to 300mA for analogue functions; and an ultraquiet (less than 30uV RMS) 2.84V (LDO3), with up to 200mA, for powering the VCO.

Power sequencing control between LDO1 and LDO2 is provided.

A microprocessor supervisory reset function, with complimentary output and adjustable reset delay time is included.

The regulator features internal over-temperature and over-current management, short-circuit protection, and a power good signal.

Only a few small external ceramic capacitors complete the design, allowing for a compact, low profile system.

The AQ9107 is available in a small 4 x 4mm, MLP-16 package at $0.89 each, 1000-off.

Evaluation boards are available.