TPS54350

www.ti.com 6,4 mm y 5,0 mm TPS54350 SLVS456C − OCTOBER 2003 − REVISED OCTOBER 2004 4.5ĆV TO 20ĆV INPUT, 3ĆA OUTPUT SYNCHRONOUS PWM SWITCHER WITH INTEGRATED FET (SWIFT) FEATURES D 100 mΩ, 4.5-A Peak MOSFET Switch for High Efficiency at 3-A Continuous Output Current D Uses External Lowside MOSFET or Diode D Output Voltage Adjustable Down to 0.891 V With 1% Accuracy D Synchronizes to External Clock D 1805 Out of Phase Synchronization D Wide PWM Frequency − Fixed 250 kHz, 500 kHz or Adjustable 250 kHz to 700 kHz D Internal Slow Start D Load Protected by Peak Current Limit and Thermal Shutdown D Adjustable Undervoltage Lockout D 16-Pin TSSOP PowerPADE Package APPLICATIONS D Industrial & Commercial Low Power Systems D LCD Monitors and TVs D Computer Peripherals D Point of Load Regulation for High Performance DSPs, FPGAs, ASICs and Microprocessors Simplified Schematic TPS54350 SYNC VIN Input Voltage PWRGD ENA VBIAS COMP BOOT PH LSG Output Voltage PGND VSENSE PWRPAD DESCRIPTION The TPS54350 is a medium output current synchronous buck PWM converter with an integrated high side MOSFET and a gate driver for an optional low side external MOSFET. Features include a high performance voltage error amplifier that enables maximum performance under transient conditions and flexibility in choosing the output filter inductors and capacitors. The TPS54350 has an under-voltage-lockout circuit to prevent start-up until the input voltage reaches 4.5 V; an internal slow-start circuit ...