SC2440

2.5 MHz Dual Switching Regulator with Integrated 2A Switches www.DataSheet4U.com SC2440 POWER MANAGEMENT Description The SC2440 is an adjustable frequency dual currentmode switching regulator with 2A integrated switches. Its high frequency operation allows the use of small inductors and capacitors, resulting in very compact power supplies. The SC2440 is suitable for next generation XDSL modems requiring operating frequencies in excess of 1.5 MHz. The two channels operate at 180° out of phase for reduced input voltage ripples. Separate soft start/ shutdown pins allow independent control and output sequencing for latch-up prevention. The SC2440 can also be externally synchronized up to 2.5 MHz per channel. Current-mode PWM control allows fast transient response with simple loop compensation. Cycle-by-cycle current limiting and hiccup overload protection reduce power dissipation during overload. Features u Up to 2.5 MHz/Channel Programmable Switching u u u u u u u u u u u u u u u u u Frequency Fixed Frequency Current-mode Control Wide Input Voltage Range 2.8V to 20V Out of Phase Switching Reduces Ripple Cycle-by-cycle Current-limiting Independent Shutdown/soft-start Pins Independent Hiccup Overload Protection Independent Power-Good Indicators Two 2A Integrated Switches External Synchronization Thermal Shutdown Thermally Enhanced 16-pin TSSOP Package XDSL and Cable Modems Set-up Boxes Point of Load Applications CPE Equipment DSP Power Supplies Disk Drives Applications Typica...