Maxim Introduces MAX8649, 1.8A Step-Down Converter

The MAX8649, a 1.8A, synchronous, fixed-frequency, DC-DC step-down converter in a tiny, 4mm² wafer-level package (WLP). This device delivers extremely tight output-voltage accuracy by integrating a highly precise bandgap reference and by minimizing offset errors in the feedback circuit. The MAX8649 achieves an initial accuracy of ±0.5% at 1.27V and a total accuracy of better than ±2% over load, line, and temperature. This superior accuracy allows applications processors to run at maximum clock speed, thus making the MAX8649 ideal for high-performance portable handsets. Additionally, this device operates from an input supply as low as 2.5V to support the latest generation of deep-discharge battery chemistries. This highly flexible step-down converter features an I²C interface that allows programming of the output voltage between 750mV and 1.38V in 10mV steps. The MAX8649 can operate either in fixed-frequency (3.25MHz) PWM mode or in power-save mode. It can also be configured to operate from the internal oscillator, or it can be synchronized to an external system clock for simplifying EMI reduction. In power-save mode, the MAX8649 employs a proprietary hysteretic PWM control scheme that reduces the effective switching frequency. The MAX8649 is offered in a tiny, 2.0mm x 2.0mm x 0.65mm, 16-bump WLP, and is fully specified over the -40°C to +85°C extended temperature range…

MAXIM MAX8649
(Picture: maxim)