The TPS5450 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 are 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 5.5 V; 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 18 μA typically. Other features include an active-high enable, overcurrent limiting,
overvoltage protection and thermal shutdown. To reduce design complexity and external component
count, the TPS5450 feedback loop is internally compensated.
The TPS5450 device is available in a thermally-enhanced, 8-pin SOIC PowerPAD package. TI
provides evaluation modules and software tool to aid in achieving high-performance power supply
designs to meet aggressive equipment development cycles.
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