TDA21471 Description

The TDA21471 power stage contains a low quiescent-current synchronous buck gate-driver IC co-packaged with Schottky diode, and high-side and low-side MOSFETs. The package is optimized for PCB layout, heat transfer, driver/MOSFET control timing, and minimal switch node ringing when layout guidelines are followed. The gate driver and MOSFET combination enables higher efficiency at the lower output voltages required by cutting-edge CPU, GPU, and DDR memory designs. The TDA21471 internal MOSFET current sense algorithm with temperature compensation achieves superior current sense accuracy versus best-in-class controller-based inductor DCR sense methods. Protection includes cycle-by-cycle over current protection with programmable threshold, VCC/VDRV UVLO protection, phase fault detection, IC temperature reporting, and thermal shutdown. The TDA21471 also features auto-replenishment of the bootstrap capacitor to prevent over-discharging. The TDA21471 features a deep-sleep power-saving mode, which greatly reduces the power consumption when the multiphase system enters PS3/PS4 mode.

TDA21471 Features

• Package: QFN

• RoHS: Lead free / RoHS Compliant

TDA21471 Applications

• CPUs

• GPUs

• DDR memory arrays