40007 pdf.pdfVIP

TPS40007 TPS40009 SLUS589B? NOVEMBER 2003 ? REVISED FEBRUARY 2005 LOW?INPUT HIGH?EFFICIENCY SYNCHRONOUS BUCK CONTROLLER FEATURES APPLICATIONS D Operating Input Voltage 2.25 V to 5.5 V D Networking Equipment D Output Voltage as Low as 0.7 V D Telecom Equipment D 1% Internal 0.7 V Reference D Base Stations D Predictive Gate Drivet N-Channel MOSFET D Servers Drivers for Higher Efficiency D DSP Power D Externally Adjustable Soft-Start and D Power Modules Overcurrent Limit D Fixed-Frequency Voltage-Mode Control DESCRIPTION ? TPS40007, 300 kHz The TPS4000x are controllers for low-voltage, ? TPS40009, 600 kHz D non-isolated synchronous buck regulators. These Source/Sink with VOUT Prebias controllers drive an N-channel MOSFET for the D 10-Lead MSOP PowerPadt Package for primary buck switch, and an N-channel MOSFET Higher Performance for the synchronous rectifier switch, thereby D Thermal Shutdown achieving very high-efficiency power conversion. In addition, the device controls the delays from main D Internal Boostrap Diode switch off