TPS5450DDAR

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1. Description

The TPS5450DDAR 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. 

2. Features

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

    2. Up to 5-A Continuous (6-A Peak) Output Current 

    3. High Efficiency Greater Than 90% Enabled by 110-mΩ Integrated MOSFET Switch

    4. Wide Output Voltage Range: Adjustable Down to 1.22 V With 1.5% Initial Accuracy

    5. Internal Compensation Minimizes External Part Count

    6. Fixed 500-kHz Switching Frequency for Small Filter Size 

    7. 18-μA Shutdown Supply Current

    8. Improved Line Regulation and Transient Response by Input Voltage Feed Forward

    9. System Protected by Overcurrent Limiting, Overvoltage Protection and Thermal Shutdown

  10. –40°C to 125°C Operating Junction Temperature Range

  11. Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD™ Package

3. Applications

    1. High Density Point-of-Load Regulators

    2. LCD Displays, Plasma Displays 

    3. Battery Chargers

    4. 12-V and 24-V Distributed Power Systems

4. Pin Configuration 

5. Pin Functions