PM6680A Datasheet | STMicroelectronics

.. Dual syncronous step-down controller with adjustable output voltages plus LDO Preliminary Data Features - - - - - - - - - - - - - - - - 6V to 36V input voltage range Adjustable output voltages 5V LDO delivers 100m A peak current 1.237V ±1% reference voltage available externally Current sensing using low side MOSFETs RDS(on) Accurate current sense with RSENSE Valley current sensing Soft-start internally fixed at 2ms Soft output discharge Latched OVP and UVP Selectable pulse skipping at light loads Selectable minimum frequency (33k Hz) in pulse skip mode 5m W maximum quiescent power Independent power good signals Output voltage ripple pensation Thermal shutdown VFQFPN-32 5X5 Description PM6680A is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with losses current sensing technique. The constant on-time architecture assures fast load transient response and the embedded voltage feed-forward provides nearly constant switching frequency operation. An embedded integrator control loop pensates the DC voltage error due to the output ripple. Pulse skipping technique increases efficiency at very light load. Moreover a minimum switching frequency of 33k Hz is selectable to avoid audio noise issues. The PM6680A provides a selectable switching frequency, allowing either 200k Hz/300k Hz, 300k Hz/400Khz or 400k Hz/500k Hz operation of the two switching sections. The output voltages OUT1 and OUT2 can be adjusted from 0.9V to 5V and from 0.9V to 3.3V respectively. Applications - - - - Embedded puter system FPGA system power Industrial applications on 24V High performance and high density DC/DC modules Order codes Part number PM6680A Package VFQFPN-32 5X5 (Exposed Pad) Packaging Tube October 2006 Rev 1 1/29 .st. 29 This is preliminary information on a new product now in development or undergoing evaluation. Details are subject to change without notice. Data Sheet 4 U...