Description

The MAX8556ETE+T is a linear voltage regulator in the electronic component category that integrates a synchronous-buck PWM controller for generating VDDQ and a sourcing and sinking LDO linear regulator for generating VTT. It also includes a 10mA reference output buffer for generating VTTR. The buck controller drives two external N-channel MOSFETs to generate output voltages down to 0.7V from a 2V to 28V input with output currents up to 15A.

Specifications and Features

• Quick-PWM with 100ns Load-Step Response
• Up to 95% Efficiency
• 2V to 28V Input Voltage Range
• 1.8V/2.5V Fixed or 0.7V to 5.5V Adjustable Output
• Up to 600kHz Selectable Switching Frequency
• Programmable Current Limit with Foldback Capability
• 1.7ms Digital Soft-Start and Independent Shutdown
• Overvoltage/Undervoltage-Protection Option
• Power-Good Window Comparator

• Fully Integrated VTT and VTTR Capability
• VTT has ±3A Sourcing/Sinking Capability
• VTT and VTTR Outputs Track VREFIN / 2
• All-Ceramic Output-Capacitor Designs
• 1.0V to 2.8V Input Voltage Range
• Power-Good Window Comparator

Application Scenarios

The MAX8556ETE+T is ideally suited for DDR memory applications in desktops, notebooks, and graphic cards. Other applications include DDR I and DDR II Memory Power Supplies, game consoles, RAID, and networking.

Comparison

• High efficiency up to 95%
• Programmable current limit and foldback capability for added safety
• Power-good window comparator for monitoring output voltage and detecting fault conditions
• Fully integrated VTT and VTTR capability with all-ceramic output-capacitor designs
• Can generate output voltages down to 0.7V from a 2V to 28V input with output currents up to 15A

• Limited to linear voltage regulation
• May not be suitable for applications requiring higher output voltages
• May not be cost-effective for low-power applications