15V, Single 15A Step-Down μModule Regulator with PMBus

The LTM4740 is a complete 15A step-down switchingmode power μModule® (micromodule) regulator with a PMBus interface in a tiny 6.25mm × 6.25mm × 5.07mm Ball Grid Array (BGA) package. The package includes the switching controller, the power MOSFETs, an inductor, and the supporting components. Operating over an input voltage range of 3V to 15V, the LTM4740 supports an output voltage range of 0.4V to 5.5V. Its highefficiency design delivers up to 15A of continuous output current. Only bulk input and output capacitors are needed. The switching frequency of the LTM4740 can be configured from 500kHz to 2MHz to provide the capability of optimizing the design in terms of size and performance. Pin-compatible with LTM4739, which is a 10A μModule regulator with PMBus. Therefore, one layout could fit different power-level requests with flexibility. The LTM4740 has an optional BIAS input pin, allowing connection from a 2.8V to 5.5V bias input supply for optimized efficiency. Operation settings and configurable features can be selected by connecting two pin-strap resistors from the PGMn pins to ground and then adjusted using PMBus commands. The LTM4740 has multiple protections, including positive and negative overcurrent (POC/NOC), output overvoltage (OV), and overtemperature (OT) to ensure a robust design. It is available with a RoHS-compliant terminal finish.

APPLICATIONS

* Data Center Power, Servers, and Storage

* Telecom, Networking, and Industrial Equipment

* Point-of-Load (POL) Voltage Regulators

* Complete Solution in <1cm2 (Single-Sided PCB) or 0.5cm2 (Dual-Sided PCB)

* PMBus Telemetry of Output Current, Output Voltage, Input Voltage, and Junction Temperature

* Pin-to-Pin Compatible with LTM4739

* Input Voltage Range: 3V to 15V

* Output Voltage Range: 0.4V to 5.5V

* Adjustable Reference Voltage: 0.4V to 0.8V (Default 0.5V)

* 90% Full-Load Efficiency from 12VIN to 1.5VOUT at 15A