Analog Devices says it can ibncrease power density in industrial, medical and communications equipment with multi-output regulators that combine a 3MHz, 1.2A buck regulator and two 300mA LDOs (low dropout regulators) in a 20-lead LFCSP package.
The ADP5041 and ADP5040 are designed to be used with mid-range FPGAs, microprocessors or DSPs where core, IO and memory voltages are necessary.
The ADP5041 regulator’s on-chip watchdog timer provides greater reliability by monitoring code execution integrity in processor-based systems and resetting the processor if it fails to strobe within a preset timeout period.
There is also an accurate (±1.5% over temperature) reset generator that can be externally programmed to monitor low-voltage power-supply rails.
The chip also has a circuit that detects a three-state condition when applied to the watchdog refresh input at the WDI pin typically controlled by a processor/DSP output port. When the processor sets this port in three-state mode, the watchdog refresh timer is disabled, preventing a watchdog reset to the processor.
"This feature is important when supporting processor/DSP sleep operation where the core is disabled and watchdog timer cannot be refreshed," said the supplier
The ADP5041 and ADP5040 multi-output regulators reduce thermal dissipation by using high-efficiency switching regulators with up 96% buck power efficiency.
For low-noise analog circuit applications, the LDOs maintain a power supply rejection greater than 60 dB for frequencies as high as 10 kHz while operating with a low headroom voltage.
The ADP5041 and ADP5040 also provide a three-rail system power supply (1.2-A buck regulator and two 300-mA LDOs) with adjustable output voltages, which allows output voltages to be easily set using an external resistor divider network.
Download data sheets and see product pages: http://www.analog.com/ADP5041: http://www.analog.com/ADP5040
