Semtech Corp. (Camarillo, CA), a producer of analog and mixed-signal semiconductors, announced the SC900, an I2C software-controlled power management device incorporating five individual, ultra-low dropout (ULDO) regulators in a 4 mm x 4 mm package. The SC900 adds the flexibility of I2C bus control so designers can quickly modify up to five common use, low dropout regulator requirements often present in battery-operated designs. Critical operational parameters can be changed or reset without replacing individual ULDOs or interface circuitry. The parameters include reset logic, power good indication, output voltage, and active shutdown.
The SC900 is suitable for cellular phones, PDAs, personal media players, palmtop/laptop computers, and similar portable equipment. The product delivers full performance on all five ULDOs over the input range of 2.7 V to 5.5 V. All five ULDOs are I2C programmable in 50 mV increments from 1.45 V to 3.00 V with an accuracy of ±3 percent, and each LDO can be independently enabled/disabled. Output noise is 45 µVrms, power supply rejection ratio is 60 dB at 50 mA, and current drawn in sleep mode is approximately 215 µA for all five ULDOs in total operation.
The SC900 is now available in production quantities, and is priced at $1.05 in 1,000-piece lots. The device is available in a 4 mm x 4 mm MLPQ-20 package. An evaluation kit containing a graphical user interface program, USB cable, and evaluation board is also available.
