DESCRIPTION
Power up sequencing prevents converter latchups. The two buck converters are out of phase, reducing input ripple, allowing for fewer input capacitors. All converters are synchronized to prevent beat frequencies. High frequency operation will reduce ripple and minimize noise. It also reduces the size of output inductors and capacitors. Other features include soft start, power-good signaling, bootstrapping for high side MOSFETs, and frequency synchronization. SC2453 PRELIMINARY FEATURES
Two synchronized converters for low noise Power up sequencing to prevent latch-ups Out of phase operation for low input ripple Over current protection Wide input range, 4.5 to 30V Programmable frequency up to 700KHz Two synchronous bucks for high efficiency at high current One dedicated programmable positive linear regulator and one dedicated programmable negative linear regulator –40 to 105 degree C operating temperature Output voltage as low as 0.5V Small package TSSOP-...
Semtech Corporation
