TPS54327DDAR Switching Regulator IC 3A Reg Buck Adjustable Step Down Converter

TPS54327DDAR Switching Regulator IC 3A Reg Buck Adjustable Step Down Converter

Applications 

• Consumer: set-top box, DVD, LCD displays

• Industrial and car audio power supplies

• Battery chargers, high-power LED supply

• 12-V and 24-V distributed power systems​

Specifications

Description 

TThe TPS543x 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 TPS543x feedback loop is internally compensated. The TPS5431 is intended to operate from power rails up to 23 V. The TPS5430 regulates a wide variety of power sources including 24 V bus.

The TPS543x device is available in a thermally enhanced, easy to use 8-pin SOIC PowerPAD™ package. TI provides evaluation modules and the Designer software tool to aid in quickly achieving high-performance power supply designs to meet aggressive equipment development cycles.

Features

• Wide input voltage range: – TPS5430: 5.5 V to 36 V – TPS5431: 5.5 V to 23 V

• Up to 3-A continuous (4-A peak) output current

• High efficiency up to 95% 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

• Improved line regulation and transient response by input voltage feedforward

• 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 SO PowerPAD package

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