Integrated, Step-Down Switching Regulator with PMBus

The MAX20734 is a fully integrated, highly efficient switching regulator with PMBus™ for applications operating from 4.5V to 16V and requiring up to 40A (max) load. This single-chip regulator provides extremely compact, high-efficiency power-delivery solutions with high-precision output voltages and excellent transient response for networking, datacom, and telecom equipment.

The IC offers a broad range of programmable features through either the PMBus or a capacitor and resistor connected to a dedicated programming pin. Using this feature, the operation can be optimized for a specific application, reducing the component count and/or setting appropriate trade-offs between the regulator’s performance and system cost. Ease of programming enables using the same design for multiple applications.

The IC includes protection and telemetry features. Positive and negative cycle-by-cycle overcurrent protection and overtemperature protection ensure a rugged design. Input undervoltage lockout shuts down the device to prevent operation when the input voltage is out of specification. A status pin provides an output signal to show that the output voltage is within range and the system is regulating.

PMBus is a trademark of SMIF, Inc.

Applications

* Communications Equipment * I/O * Memory VDDQ * Networking Equipment * Point-of-Load Voltage Regulators * Servers and Storage Equipment * μP Chipsets

* High Power Density and Low Component Count

* Overall Solution Size 509mm2 Including Inductor and Output Capacitors* 90.7% Peak Efficiency with VDDH = 12V and VOUT = 1V* Fast Transient Response: Supports Up to 300A/μs Load-Step Transients * Optimized Component Performance and Efficiency with Reduced Design-In Time

* PMBus-Compliant Interface for Telemetry and Power Management* Voltage, Current, and Temperature Reporting through the Digital Bus * Increased Power-Supply Reliability with System and IC Self-Protection Features

* Differential Remote Sense with Open-Circuit Detection* Hiccup Overcurrent Protection* Programmable Thermal Shutdown