PM6681A Datasheet | STMicroelectronics

.. Dual step-down controller with adjustable LDO Target Specification Features - - - - - - 6V to 36V input voltage range Adjustable output voltages 0.9-3.3V LDO adjustable delivers 100m A peak current 5V LDO delivers 100m A peak current 1.237V ±1% reference voltage available NO RSENSE current sensing using low side MOSFETs' RDS(on) Negative current limit Soft start internally fixed at 2ms Soft output discharge Latched UVP Not-latched OVP Selectable pulse skipping at light loads Selectable minimum frequency(33k Hz) in pulse skip mode 5m W maximum quiescent power Indipendent power good signals Output voltage ripple pensation PM6681A is a dual step-down controller specifically designed to provide extremely high efficiency conversion, with lossless 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 PM6681A provides a selectable switching frequency, allowing three different values of switching frequencies for 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. The device provides also 2 LDOs, 5V fixed and 0.9V-3.3V adjustable. VFQFPN-32 (5mm x 5mm) Description - - - - - - - - - - Applications - - - - Embedded puter system FPGA system power Industrial applications on 24V High performance and high density DC/DC modules Order codes Part number PM6681A PM6681ATR November 2006 Package VFQFPN-32 (5mm x 5mm) VFQFPN-32 (5mm x 5mm) Rev 1 Packaging Tube Tape and Reel 1/12 .st. 12 This is preliminary information on a new product foreseen to be developed. Details are...