The TPS40170 is a synchronous, PWM buck controller that accepts a wide range of input voltage from 4.5 V to 60 V and features voltage-mode control with input-voltage, feed-forward compensation. The switching frequency is programmable from 100 kHz to 600 kHz.

The TPS40170 has a complete set of system protections such as programmable undervoltage lockout (UVLO), programmable overcurrent protection (OCP), selectable short-circuit protection (SCP), and thermal shutdown. The ENABLE pin allows for system shutdown in a low-current (1-µA typical) mode. The controller supports pre-biased outputs, provides an open-drain PGOOD signal, and has closed loop programmable soft-start, output voltage tracking, and adaptive dead time control.

The TPS40170 provides accurate output voltage regulation through 1% specified accuracy.

Additionally, the controller implements a novel scheme of bidirectional synchronization with one controller acting as the primary other downstream controllers acting as secondaries, synchronized to the primary in-phase or 180° out-of-phase. Secondary controllers can be synchronized to an external clock within ±30% of the internal switching frequency.