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 typically. Other features include an
active-high enable, overcurrent limiting, overvoltage protection and thermal
shutdown. To reduce design complexity and external component count, the TPS5420
feedback loop is internally compensated.The TPS5420 device is available in an
easy to use 8-pin SOIC package. TI provides evaluation modules and the Designer
software tool to aid in quickly achieving high-performance power supply designs to
meet aggressive equipment development cycles.