TPS54331 Datasheet | Texas Instruments

Features - 3.5 to 28-V input voltage range - Adjustable output voltage down to 0.8 V - Integrated 80-mΩ high-side MOSFET supports up to 3-A continuous output current - High efficiency at light loads with a pulse skipping Eco-mode - Fixed 570-k Hz switching frequency - Typical 1-μA shutdown quiescent current - Adjustable slow-start limits inrush currents - Programmable UVLO threshold - Overvoltage transient protection - Cycle-by-cycle current limit, frequency foldback, and thermal shutdown protection - Available in easy-to-use SOIC8 package or thermally-enhanced SOIC8 Power PAD™ integrated circuit package - Create a custom design using the TPS54331 with the WEBENCH® Power Designer - Use TPS62933 for a 30 VIN converter with higher frequency, lower IQ and improved EMI 2 Applications - Consumer applications such as set-top boxes, CPE equipment, LCD displays, peripherals, and battery chargers - Industrial and car-audio power supplies - 5-V, 12-V, and 24-V distributed power systems Ren1 Ren2 TPS54331D BOOT PH SS P C1 C2 R3 VSENSE GND VIN CI CBOOT LO D1 VOUT RO1 RO2 Simplified Schematic 3 Description The TPS54331 device is a 28-V, 3-A nonsynchronous buck converter that integrates a low RDS(on) high-side MOSFET. To increase efficiency at light loads, a pulse skipping Eco-mode feature is automatically activated. Furthermore, the 1-μA shutdown supply-current allows the device to be used in battery-powered applications. Current mode control with internal slope pensation simplifies the external pensation calculations and reduces ponent count while allowing the use of ceramic output capacitors. A resistor divider programs the hysteresis of the input undervoltage lockout. An overvoltage transient protection circuit limits voltage overshoots during start-up and transient conditions. A cycle-by-cycle current-limit scheme, frequency foldback and thermal shutdown protect the device and the load in the event of an overload condition. The TPS54331 device is...