ADI adds dual output synchronous controller to power management range

According to ADI, the ADP1850 provides an input voltage range of 2.75 to 20V, as well as easy configuration for dual output (up to 2 x 25A) or single interleaved output (up to 50A) systems. The device has been designed to provide accurate tracking capability between supplies and includes independent, precision ENABLE and accurate POWER_GOOD functions. ADI says these allow accurate daisy chain sequencing between channels or another device – an important feature for powering multi-input voltage fpga, dsp and asic devices. "The ADP1850 offers more versatility, performance, and integration than other dc/dc switching controllers available and provides a simpler approach for reliable system power up sequencing," said Laurence McGarry, marketing manager, Power Management Products Group, Analog Devices. "Designers can easily leverage the ADP1850's performance and flexibility over a number of different platforms, applications and designs without re-qualifying new devices." The switching controller can be synchronised to an external clock to eliminate system beat frequencies between converters that can sometimes result in audible noise. It operates in current mode for improved transient response and uses valley-current sensing for enhanced noise immunity. The architecture enables accurate current sharing between interleaved phases for high current outputs up to 50A. For low load operation, the ADP1850 can be configured to operate in power saving mode by skipping pulses and reducing switching losses to improve the energy efficiency at light load. Additional flexibility is provided by externally programmable loop compensation, soft start and frequency, current limit and current sense gain settings.