Dual-Winding TLVR Inductors for Multi-Phase VRs – PGL/PAL Series

Pulse Electronics, a YAGEO company, inductors are used to power processors, memory, FPGAs and ASICs in servers, datacenters, and storage systems. These inductors are specifically designed for use with the trans-inductor voltage regulator (TLVR) topology. The TLVR topology enables faster transient response and utilizes a dual-winding power bead inductor.

Traditionally, these applications have used single-winding inductors used in a multi-phase buck topology which allows currents to be distributed through parallel ‘paths’ or phases. By operating each phase in a staggered fashion, the ripple currents in each phase tend to cancel at the output and the overall ripple current seen at the load is much smaller than the ripple on each phase. This approach allows smaller inductances to be used (typically on the order of 50 nH to 300 nH) and can allow design engineers a trade off between how quickly the converter responds to a change in the load current (transient response) versus the stability of the control loop. By adjusting the number of phases used in the converter, the designer has thee flexibility to optimize the circuit for their specific application. Pulse offers their TLVR inductors in a wide range of inductance and current values.