MAX8654
PRODUCTION12V, 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
- Part Models
- 2
- 1ku List Price
- Starting From $14.17
Overview
- 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
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.
Applications
- DDR Memory
- Graphic Cards
- Network-Power Supplies
- POL Power Supplies
- RAID Power Supplies
- Servers
Documentation
Data Sheet 1
User Guide 1
Technical Articles 2
ADI has always placed the highest emphasis on delivering products that meet the maximum levels of quality and reliability. We achieve this by incorporating quality and reliability checks in every scope of product and process design, and in the manufacturing process as well. "Zero defects" for shipped products is always our goal. View our quality and reliability program and certifications for more information.
| Part Model | Pin/Package Drawing | Documentation | CAD Symbols, Footprints, and 3D Models |
|---|---|---|---|
| MAX8654ETX+ | LFCSP | ||
| MAX8654ETX+T | LFCSP |
This is the most up-to-date revision of the Data Sheet.
Software Resources
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ADI Power Studio™ Designer
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Learn MoreEvaluation Kits
Evaluation Kit for the MAX8654 and MAX8688