General Description

The MAX15034 two-phase, configurable single- or dual output buck controller has an input voltage range of 4.75V to 5.5V or 5V to 28V. A mode select input? allows for a dual-output supply or connecting two phases together for a single-output, high-current supply. Each output channel of the MAX15034 drives n-channel MOSFETs and is capable of providing more than 25A of load current. The MAX15034 uses average currentmode control with a switching frequency up to 1MHz per phase where each phase is 180° out of phase with respect to the other. Out-of-phase operation results in significantly reduced input capacitor ripple current and output voltage ripple in dual-phase, single-output voltage applications. Each controller has its own high-performance current and voltage-error amplifier that can be compensated for optimum output filter L-C values and transient response.

特性 Features

? 4.75V to 5.5V or 5V to 28V Input

? Dual-Output Synchronous Buck Controller

? Configurable for Two Separate Outputs (25A) or One Single Output (50A)

? Average Current-Mode Control with Accurate Adjustable Current Limit

? 180° Interleaved Operation Reduces Size of Input Filter Capacitors

? Limits Reverse Current Sinking When Operated in Parallel Mode

? Each Output is Adjustable from 0.61V to 5.5V

? Independently Programmable Adaptive Voltage Positioning

? Monotonic Startup into Prebiased Outputs

? Independent Shutdown for Each Output

? 100kHz to 1MHz per Phase Programmable Switching Frequency

? Oscillator Frequency Synchronization from 200kHz to 2MHz

? Digital Soft-Start on Outputs

? Hiccup-Mode Overcurrent Protection

? Overtemperature Shutdown

? Thermally Enhanced 28-Pin TSSOP Package Capable of Dissipating 2.1W

Applications

??? High-End Computers/Workstations/Servers

??? Graphics Cards

??? Networking Systems

??? Point-of-Load High-Current/High-Density Telecom DC-DC Regulators

??? RAID Systems