LTM4645 Datasheet

• 4.7V to 15V Input Voltage Range
• 0.6V to 1.8V Output Voltage Range
• 25A DC Output Current
• 1.2% Total DC Output Voltage Error (–40°C to 125°C)
• High Reliability N + 1 Phase Redundancy Supported
• Internal or External Control Loop Compensation
• Differential Remote Sense Amplifier for Precision Regulation
• Current Mode Control/Fast Transient Response
• Multiphase Current Sharing Up to 150A
• Built-In Temperature Monitoring
• Selectable Pulse-Skipping, Burst Mode^® Operation
• Soft-Start/Voltage Tracking
• Frequency Synchronization
• Output Overvoltage Protection
• Output Overcurrent Foldback Protection
• 9mm × 15mm × 3.51mm BGA Package

• Telecom, Networking and Industrial Equipment
• Point of Load Regulation

The LTM4645 is a 25A output switching mode step-down DC/DC µModule^® (power module) regulator. Included in the package are the switching controller, power FETs, inductor and all supporting components. Operating over an input voltage range of 4.7V to 15V, the LTM4645 supports an output voltage range of 0.6V to 1.8V, set by a single external resistor. Only a few input and output capacitors are needed.

Its high efficiency design delivers about 86% efficiency from 12V input to 1.0V output with 25A continuous load current. High switching frequency and a current-mode architecture enable a very fast transient response to line and load changes without sacrificing stability. The device supports frequency synchronization, programmable multiphase operation, N+1 phase redundancy, and output voltage tracking for supply rail sequencing.

Fault protection features include overvoltage and overcurrent protection. The power module is offered in a space saving 9mm × 15mm × 3.51mm BGA package. The LTM4645 is available with SnPb (BGA) or RoHS compliant terminal finish.