TPS40192

Product Folder Order Now Technical Documents Tools & Software Support & Community Reference Design TPS40192, TPS40193 SLUS719H – MARCH 2007 – REVISED MAY 2019 TPS4019x 4.5-V to 18-V Input, Voltage-Mode, Synchronous Buck Controller With Power Good 1 Features 1 Input Operating Voltage Range: 4.5 V to 18 V Up to 20-A Output Currents Supports Pre-Biased Outputs 0.5%, 591-mV Reference Switching Frequency – TPS40192: 600 kHz – TPS40193: 300 kHz Three Selectable Thermally Compensated ShortCircuit Protection Levels Hiccup Restart from Faults Internal 5-V Regulator High-Side and Low-Side MOSFET ON-resistance (RDS(on)) Current Sensing 10-Pin 3 mm × 3 mm SON Package Internal 4-ms Soft-Start Time Thermal Shutdown Protection at 145°C 2 Applications Cable Modem CPE Digital Set Top Box Graphics/Audio Cards Entry Level and Mid-Range Servers 3 Description TPS40192 and TPS40193 are cost-optimized synchronous buck controllers that operate from 4.5 V to 18 V input. These controllers implement a voltagemode control architecture with the switching frequency fixed at either 600 kHz (TPS40192) or 300 kHz (TPS40193). The higher switching frequency facilitates the use of smaller inductor and output capacitors, thereby providing a compact powersupply solution. An adaptive anti-cross conduction scheme is used to prevent shoot through current in the power FETs. Short circuit detection is done by sensing the voltage drop across the low-side MOSFET when it is on and c...