Synchronous boost converter with adjustable output current limit

The Texas Instruments TPS61230A device is a high efficiency fully integrated synchronous boost converter. It integrates 6A, 21mohm and 18mohm power switches, which is capable of delivering up to 2.4A output current at 5V output with the 2.5V input supply. The low RDS_ON switches enable the power conversion efficiency up to 96% and minimise the thermal stress in very compact solution size. The typical operating frequency is 1.15MHz, which allows the use of small inductor and capacitors to achieve a small solution size. The device provides an adjustable output voltage via an external resistor divider. During the light load condition, it automatically enters into the PFM operation for maximising the efficiency with the lowest quiescent current. In the shutdown by pulling EN pin to the logic low, the load is completely disconnected from the input, and the input current consumption is reduced to below 1µA. When the output is shorted, the device enters into the hiccup protection mode and recovery automatically when the output short is released. Other features like the output over voltage protection, thermal shutdown protection are integrated. The device is available in a 2mm × 2mm × 0.9mm VQFN package and requires the minimum amount of external components.