TPS5450

5.5V 至 36V 输入、5A、500kHz 降压转换器

The 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. 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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Wide Input Voltage Range: 5.5 V to 36 V

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Up to 5-A Continuous 6-A Peak Output Current

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High Efficiency Greater Than 90% Enabled by 110-mΩ

Integrated MOSFET Switch

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Wide Output Voltage Range: Adjustable Down to 1.22 V

With 1.5% Initial Accuracy

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Internal Compensation Minimizes External Part Count

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Fixed 500-kHz Switching Frequency for Small Filter Size

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18-µA Shutdown Supply Current

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Improved Line Regulation and Transient Response by Input

Voltage Feed Forward

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System Protected by Overcurrent Limiting, Overvoltage

Protection and Thermal Shutdown

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–40°C to 125°C Operating Junction

Temperature Range

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Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD™

Package