MAX8646
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MAX8646

6A, 2MHz Step-Down Regulator with Integrated Switches

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Smallest, Most Efficient 6A Step-Down Regulator and Up to 2.4MHz Frequency

Info: : PRODUCTION tooltip
Info: : PRODUCTION tooltip
Part Details
Part Models 2
1ku List Price Starting From $5.32
Features
  • Internal 23mΩ RDS(ON) MOSFETs
  • Continuous 6A Output Current
  • ±1% Output Accuracy over Load, Line, and Temperature
  • Operates from 2.35V to 3.6V Supply
  • Adjustable Output from 0.6V to (0.9 x VIN)
  • Soft-Start Reduces Inrush Supply Current
  • 500kHz to 2MHz Adjustable Switching Frequency
  • Compatible with Ceramic, Polymer, and Electrolytic Output Capacitors
  • VID-Selectable Output Voltages
    • 0.6V, 0.7V, 0.8V, 1.0V, 1.2V, 1.5V, 1.8V, 2.0V, and 2.5V
  • Fully Protected Against Overcurrent and Overtemperature
  • Safe-Start into Prebiased Output
  • Sink/Source Current in DDR Applications
  • Lead-Free, 24-Pin, 4mm x 4mm Thin QFN Package
Additional Details
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The MAX8646 high-efficiency switching regulator delivers up to 6A load current at output voltages from 0.6V to 0.9 x VIN. The IC operates from 2.35V to 3.6V, making it ideal for on-board point-of-load and postregulation applications. Total output error is less than ±1% over load, line, and temperature ranges.

The MAX8646 features fixed-frequency PWM mode operation with a switching frequency range of 500kHz to 2MHz set by an external resistor. High-frequency operation allows for an all-ceramic capacitor design. The high operating frequency also allows for small-size external components.

The low-resistance on-chip nMOS switches ensure high efficiency at heavy loads while minimizing critical inductances, making the layout a much simpler task with respect to discrete solutions. Following a simple layout and footprint ensures first-pass success in new designs.

The MAX8646 comes with a high bandwidth (> 14MHz) voltage-error amplifier. The voltage-mode control architecture and the voltage-error amplifier permit a type III compensation scheme to be utilized to achieve maximum loop bandwidth, up to 20% of the switching frequency. High loop bandwidth provides fast transient response, resulting in less required output capacitance and allowing for all-ceramic-capacitor designs.

The MAX8646 provides two tri-state logic inputs to select one of nine preset output voltages. The preset output voltages allow customers to achieve ±1% output-voltage accuracy without using expensive 0.1% resistors. In addition, the output voltage can be set to any customer value by either using two external resistors at the feedback with 0.6V internal reference or applying an external reference voltage to the REFIN input. The MAX8646 offers programmable soft-start time using one capacitor to reduce input inrush current. The MAX8646 is available in a lead-free, 24-pin, 4mm x 4mm, thin QFN package.

Applications

  • ASIC/CPU/DSP Core and I/O Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • POLs
  • RAID Control Power Supplies
  • Telecom and Networking Power Supplies
Part Models 2
1ku List Price Starting From $5.32

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Documentation

Documentation

Part Model Pin/Package Drawing Documentation CAD Symbols, Footprints, and 3D Models
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Product Lifecycle

PCN

Mar 9, 2023

- 2276A

WAFER FAB

MAX8646ETG+

PRODUCTION

MAX8646ETG+T

PRODUCTION

Jun 20, 2016

- 1612

ASSEMBLY

MAX8646ETG+

PRODUCTION

MAX8646ETG+T

PRODUCTION

Filter by Model

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Reset Filters

Part Models

Product Lifecycle

PCN

Mar 9, 2023

- 2276A

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WAFER FAB

MAX8646ETG+

PRODUCTION

MAX8646ETG+T

PRODUCTION

Jun 20, 2016

- 1612

arrow down

ASSEMBLY

MAX8646ETG+

PRODUCTION

MAX8646ETG+T

PRODUCTION

Software & Part Ecosystem

Software & Part Ecosystem

Evaluation Kit

Evaluation Kits 1

MAX8646EVKIT

Evaluation Kit for the MAX8646

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MAX8646EVKIT

Evaluation Kit for the MAX8646

Evaluation Kit for the MAX8646

Features and Benefits

  • Internal 23mΩ On-Resistance MOSFETs
  • 6A Output PWM Step-Down Regulator
  • ±1% Output Accuracy over Load, Line, and Temperature
  • Operates from 2.35V to 3.6V Input Supply
  • Adjustable Output from 0.6V to (0.9 x VIN)
  • 500kHz to 2MHz Adjustable Frequency
  • Allows All-Ceramic Capacitor Design
  • Programmable Soft-Start Time
  • 24-Pin, 4mm x 4mm Thin QFN Package
  • REFIN for DDR Termination and Tracking Applications
  • Surface-Mount Components
  • Assembled and Tested

Product Detail

The MAX8646 evaluation kit (EV kit) is a fully assembled and tested PCB that demonstrates the capabilities of the MAX8646 integrated 6A step-down regulator. The EV kit generates a +1.8V output voltage at load currents up to 6A from a 2.35V to 3.6V input voltage range. The MAX8646 switches at 1MHz and up to 95% efficiency with the supplied components.

Applications

  • ASIC/CPU/DSP Core and I/O Voltages
  • Base-Station Power Supplies
  • DDR Power Supplies
  • POLs
  • RAID Control Power Supplies
  • Telecom and Networking Power Supplies

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