TPS5450DDAR

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 undervoltagelockout 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 feedforward 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 thermallyenhanced, 8-pin SOIC PowerPAD package.

Applications

• High Density Point-of-Load Regulators
• LCD Displays, Plasma Displays
• Battery Chargers
• 12-V and 24-V Distributed Power Systems

Key features

• Wide Input Voltage Range: 5.5 V to 36 V
• Up to 5-A Continuous (6-A Peak) Output Current
• High Efficiency Greater Than 90% Enabled by 110-mΩ Integrated MOSFET Switch
• Wide Output Voltage Range: Adjustable Down to 1.22 V With 1.5% Initial Accuracy
• Internal Compensation Minimizes External Part Count
• Fixed 500-kHz Switching Frequency for Small Filter Size
• 18–μA Shutdown Supply Current
• Improved Line Regulation and Transient Response by Input Voltage Feed Forward
• System Protected by Overcurrent Limiting, Overvoltage Protection and Thermal Shutdown
• -40°C to 125°C Operating Junction Temperature Range
• Available in Small Thermally Enhanced 8-Pin SOIC PowerPAD Package