SC2620

POWER MANAGEMENT www.DataSheet4U.com Description Dual 2A, 30V Step-down Regulator with Programmable Frequency up to 1.4MHz Features ‹ Wide Input Voltage Range 2.8V to 30V ‹ Up to 1.4MHz/Channel Programmable Switching Frequency Current-mode Control Out of Phase Switching Reduces Ripple Cycle-by-cycle Current-limiting Independent Shutdown/soft-start Pins Independent Hiccup Overload Protection Channel 1 Power Good Indicator Two 2.3A Integrated Switches Thermal Shutdown Thermally Enhanced SO-16 Lead Free Package Fully WEEE and RoHS Compliant SC2620 The SC2620 is a constant frequency dual current-mode switching regulator with integrated 2.3A, 30V switches. Its switching frequency can be programmed up to 1.4MHz per channel. Due to the SC2620’s high frequency operation, small inductors and ceramic capacitors can be used, resulting in very compact power supplies. The two channels of the SC2620 operate at 180° out of phase for reduced input voltage ripples. ‹ ‹ ‹ ‹ ‹ Separate soft start/enable pins allow independent control ‹ of each channel. Channel 1 power good indicator can be ‹ used for output start up sequencing to prevent latch-up. ‹ ‹ Current-mode PWM control achieves fast transient ‹ response with simple loop compensation. Cycle-by-cycle current limiting and hiccup overload protection reduce power dissipation during overload. Applications ‹ ‹ ‹ ‹ ‹ XDSL and Cable Modems Set-top Boxes Point of Load Applications CPE Equipment DSP Power Supplies Typical Application Circuit ...