MAX16992ATCF/V+T

Introduction

MAX16992ATCF/V+T is a DC/DC switching controller designed for use in a wide range of power management applications. The device operates with a minimal number of external components and offers a high level of protection features. The main features of this device include a selectable programmable frequency and a low-side current limiting feature.

Application Field

This device is suitable for Point of Load (POL) applications, including but not limited to, server/workstation, storage, telecommunications equipment, and industrial automation. It provides an excellent mean to develop high power designs ringing very few components. Furthermore, with its integrated diagnostics and protections, the MAX16992ATCF/V+T allows designers to create their application system with the highest level of safety and reliability.

Working Principle

For efficient power conversion, the device utilizes a synchronous rectification with fixed over-current protection. The device automatically switches between synchronous rectification and diode rectification based on the load conditions. The MAX16992ATCF/V+T also contains an integrated high speed transconductance error amplifier with an adjustable output voltage range from 0.8V to 6.5V. The error amplifier accepts both resistive and feedback loops. A feedback loop requires an external sensing resistor to sense the output voltage. In some applications, using an N-channel MOSFET as the synchronous rectifier can yield the highest efficiency. A P-channel MOSFET can also be used as the low-side device. The low-side MOSFET device should be able to handle at least the peak inductor current for stability reasons.

In addition to the synchronous rectifier and error amplifier, the device includes a power switch over-current protection and a synchronization block to minimize the amount of external components. The over-current protection prevents the switching transistor from being damaged due to current overloads. The device contains a synchronization block which allows the device to be synchronized with an external clock in order to reduce the electromagnetic interference (EMI) noise at the switch node. The MAX16992ATCF/V+T also provides an extensive set of control and protection features such as programmable fault settings, thermally compensated low-side current limit and a selectable programmable frequency. All of the aforementioned features are integrated on a single chip.

Conclusion

In conclusion, the MAX16992ATCF/V+T is a DC/DC switching controller that is suitable for Point of Load applications. It integrates a high speed transconductance error amplifier, synchronous rectification with fixed over current protection, and a synchronization block for minimizing the external component count. Additionally, it provides an extensive set of control and protection features to ensure safety and reliability. Furthermore, the device can be synchronized with an external clock for EMI noise reduction.