TPS5431 - Texas Instruments

TPS5431 3-A Wide Input Range Step-Down Converter

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 volta.

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 compensation 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 .