V62/90644-01XE

5 -A ，宽输入范围，降压SWIFTâ ?? ¢转换器 5-A, WIDE INPUT RANGE, STEP-DOWN SWIFT™ CONVERTER

DESCRIPON

As a member of the SWIFT™ family of DC/DC regulators, 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.

FEATURES

• Qualified for Automotive Applications

• 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 Parts 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

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

APPLICATIONS

• High-Density Point-of-Load Regulators

• LCD Displays, Plasma Displays

• Battery Chargers

• 12-V/24-V Distributed Power Systems