Texas Instruments TPS51285A Ultra-Low Quiescent (ULQT), Dual Synchronous Step-Down Controller with 5V and 3.3V LDOs TPS51285ARUKR

The TPS51285A is an ultra-low quiescent dual synchronous step-down controller designed for notebook and tablet computers. It operates with an input voltage range of 5V to 24V and provides adjustable output voltages of 5V and 3.3V with a reference accuracy of ¬±1%. The device features built-in 100-mA LDOs for both output voltages, enhancing its utility in power supply applications. This controller employs adaptive on-time D-CAP,Ñ¢ mode control, which allows for efficient power consumption and fast load transient response without the need for external compensation networks. It includes auto-skip and ULQ,Ñ¢ modes to optimize battery life during system standby. The TPS51285A also incorporates a voltage servo soft-start feature, output discharge function, and various protection mechanisms, including overvoltage protection (OVP), undervoltage protection (UVP), and overcurrent protection (OCP). The device is housed in a compact 20-pin 3mm x 3mm QFN package and is rated for operation in a temperature range of -40¬8C to 85¬8C. This combination of features makes the TPS51285A suitable for applications requiring efficient power management in portable devices.