FUNKTIONER
●Up to 2-A Continuous (3-A Peak) Output Current
●High Efficiency up to 95 percent Enabled by 110-mΩ Integrated MOSFET Switch
●Internal Compensation Minimizes External Parts Count
●Fixed 500-kHz Switching Frequency for Small Filter Size
●System Protected by Over Current Limiting,Over Voltage Protection and Thermal Shutdown
●–40 degree to 125 degree Operating Junction Temperature Range
●Available in Small 8-Pin SOIC Package
ANSÖKNINGAR
●Consumer: Set-top Box, DVD, LCD Displays
●12-V/24-V Distributed Power Systems
BESKRIVNING
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 5.5 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 TPS5420 feedback loop is internally compensated.
TPS5420-enheten är tillgänglig i ett lättanvänt 8--stift SOIC-paket. TI tillhandahåller utvärderingsmoduler och mjukvaruverktyget Designer för att hjälpa till att snabbt uppnå högpresterande strömförsörjningsdesigner för att möta aggressiva utvecklingscykler för utrustning.
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