TPS5420

TPS5420 SLVS642F – APRIL 2006 – REVISED JANUARY 2024 TPS5420 2A, Wide Input Range, Step-Down Converter 1 Features Wide Input Voltage Range: 5.5V to 36V Up to 2A Continuous (3A Peak) Output Current High Efficiency up to 95% Enabled by 110mΩ Integrated MOSFET Switch Wide Output Voltage Range: Adjustable Down to 1.22V with 1.5% Initial Accuracy Internal Compensation Minimizes External Parts Count Fixed 500kHz Switching Frequency for Small Filter Size Improved Line Regulation and Transient Response by Input Voltage Feed Forward System Protected by Over Current Limiting, Over Voltage Protection and Thermal Shutdown –40°C to 125°C Operating Junction Temperature Range Available in Small 8-Pin SOIC Package 2 Applications Consumer: Set-top Box, DVD, LCD Displays Industrial and Car Audio Power Supplies Battery Chargers, High Power LED Supply 12V/24V Distributed Power Systems 3 Description The TPS5420 is a high-output-current PWM converter that integrates a low resistance high side N-channel MOSFET. Included on the substrate with the listed features is a high performance voltage error amplifier that provides tight voltage regulation accuracy under transient conditions; an undervoltage-lockout circuit to prevent start-up until the input voltage reaches 5.5V; an internally set slow-start circuit to limit inrush currents; and a voltage feed-forward circuit to improve the transient response. Using the ENA pin, shutdown supply current is reduced to 18μA typicall...