TPS51518RUKR

The TPS51518RUKR from Texas Instruments is a single-phase D-CAP and D-CAP2 synchronous buck controller featuring a 2-bit flexible VID control architecture. This controller is designed for applications requiring multiple, externally programmable output voltage levels, such as GFX supplies and notebook computers.

It supports a wide input voltage range from 3 V to 28 V and allows for output voltages to be adjusted from 0.5 V to 2.0 V. The device utilizes adaptive on-time modulation with selectable D-CAP or D-CAP2 modes, operating at 350 kHz for fast transient response or ultra-low ESR output capacitors. Current sensing is achieved via low-side RDS(on) with a temperature coefficient of 4700 ppm/°C.

The TPS51518RUKR offers programmable soft-start and output voltage transition times, along with built-in output discharge functionality. It includes a comprehensive protection suite, featuring overvoltage protection (OVP), overcurrent protection (OCP), 5-V undervoltage lockout (UVLO), and thermal shutdown. The controller is housed in a compact 3 mm x 3 mm, 20-pin WQFN package suitable for surface mounting.

Key features include differential voltage feedback, DC compensation for accurate regulation, an integrated boost switch, and a power good output. This makes the TPS51518RUKR a versatile solution for power management in demanding applications.