MAX8654

12V, 8A, 1.2MHz, Step-Down Regulator

A Broad Input Voltage (+4.5V to +12V) Step-Down Regulator with Integrated MOSFETs that Offers a Wealth of Features and Excellent Design Flexibility for High-Current (< 10A), High-Power Density POL Supplies


Please check latest availability status for a specific part variant.

Description

The MAX8654 high-efficiency switching regulator delivers up to 8A of load current at output voltages from 0.6V to 0.85 x VIN. The IC operates from 4.5V to 14V, making it ideal for on-board point-of-load and postregulation applications, with total output error less than ±1% over load, line, and temperature ranges.

The MAX8654 is a fixed-frequency PWM mode regulator with a switching frequency range of 250kHz to 1.2MHz set by an external resistor or SYNC input. High-frequency operation allows for an all-ceramic-capacitor solution. A SYNCOUT output is provided to synchronize a second regulator switching 180° out-of-phase with the first to reduce the input ripple current and consequently reduce the required input capacitance. The high operating frequency minimizes the size of external components.

The on-board low RDS(ON) dual-nMOS design keeps the board cooler at heavy loads while minimizing the critical inductances, making the layout a much simpler task with respect to the discrete solutions.

The MAX8654 comes with a high-bandwidth (20MHz) voltage-error amplifier. The voltage-mode control architecture and the op-amp voltage-error amplifier permit a type 3 compensation scheme to be utilized to achieve maximum loop bandwidth, up to 20% of the switching frequency. High loop bandwidth achieves fast transient response resulting in less output capacitance required.

The MAX8654 offers programmable soft-start to accommodate different types of output capacitors and reduce input inrush current. The MAX8654 is available in a 36-lead TQFN package.
MAX8654: Typical Operating Circuit MAX8654: Typical Operating Circuit Enlarge+

Key Features

  • Internal 26mΩ RDS(ON) MOSFETs
  • Guaranteed 8A Output Current
  • Adjustable Overcurrent Protection
  • 1% Output Accuracy Over Temperature
  • Operates from 4.5V to 14V Supply
  • Adjustable Output from 0.6V to 0.85 x VIN
  • Soft-Start Reduces Inrush Supply Current
  • 250kHz to 1.2MHz Adjustable Switching or SYNC Input
  • Compatible with Ceramic, Polymer, and Electrolytic Output Capacitors
  • SYNCOUT Synchronizes 2nd Regulator 180° Out-of-Phase
  • 36-Pin, Lead-Free, 6mm x 6mm TQFN Package

Applications/Uses

  • DDR Memory
  • Graphic Cards
  • Network-Power Supplies
  • POL Power Supplies
  • RAID Power Supplies
  • Servers

See parametric specs for Step-Down Switching Regulators (405)


Part NumberVIN
(V)
VIN
(V)
VOUT1
(V)
VOUT1
(V)
Output Adjust. MethodIOUT1
(A)
Switch TypeSynchronous SwitchingPower Good SignalDC-DC OutputsOper. Freq.
(kHz)
Design ToolsPackage/PinsBudgetary
Price
minmaxminmaxmaxSee Notes
MAX8654 4.5140.612Resistor8InternalYesYes11200EE-Sim
TQFN/36
$6.56 @1k

Pricing Notes:
This pricing is BUDGETARY, for comparing similar parts. Prices are in U.S. dollars and subject to change. Quantity pricing may vary substantially and international prices may differ due to local duties, taxes, fees, and exchange rates. For volume-specific and version-specific prices and delivery, please see the price and availability page or contact an authorized distributor.

MAX8654EVKIT: Evaluation Kit for the MAX8654 and MAX8688

Tools & Models

  • EE-Sim: Design & Simulate MAX8654
  • Product Reliability Reports: MAX8654.pdf 
    Device   Fab Process   Technology   Sample size   Rejects   FIT at 25°C   FIT at 55°C   Material Composition  

    Note : The failure rates are summarized by technology and mapped to the associated material part numbers. The failure rates are highly dependent on the number of units tested.

    Quality Management System >
    Environmental Management System >

     
    Status:
    Package:
    Temperature:

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    Software
    • Create a MAX8654 schematic and simulate it using EE-Sim.