TPS5430 Datasheet | Texas Instruments

TPS5430, TPS5431 SLVS632K - JANUARY 2006 - REVISED JANUARY 2024 TPS543x 3A, Wide Input Range, Step-Down Converter 1 Features - Wide input voltage range: - TPS5430: 5.5V to 36V - TPS5431: 5.5V to 23V - Up to 3A continuous (4A peak) output current - High efficiency up to 95% enabled by 100mΩ integrated MOSFET switch - Wide output voltage range: adjustable down to 1.22V with 1.5% initial accuracy - Internal pensation minimizes external parts count - Fixed 500kHz 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™ integrated circuit package - Create a custom design using the TPS5430 with the WEBENCH® Power Designer 2 Applications - Consumer: set-top box, DVD, LCD displays - Industrial and car audio power supplies - Battery chargers, high-power LED supply - 12V and 24V distributed power systems 3 Description The 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 5.5V; 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 15μA typically. Other Features include an active-high enable, overcurrent limiting, overvoltage protection and thermal shutdown. To reduce...