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MAX8654

更新时间： 2024-11-22 14:58:27
品牌 Logo 应用领域
亚德诺 - ADI 调节器
页数 文件大小 规格书
17页 214K
描述
12V、8A、1.2MHz、降压型调节器

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MAX8654 数据手册

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19-0588; Rev 3; 6/11  
12V, 8A 1.2MHz  
Step-Down Regulator  
MAX8654  
General Description  
Features  
The MAX8654 high-efficiency switching regulator delivers  
up to 8A of load current at output voltages from 0.6V to  
o Internal 26mΩ R  
o Guaranteed 8A Output Current  
MOSFETs  
DS(ON)  
0.85 x V . The IC operates from 4.5V to 14V, making it  
IN  
o Adjustable Overcurrent Protection  
o 1% Output Accuracy Over Temperature  
o Operates from 4.5V to 14V Supply  
o Adjustable Output from 0.6V to 0.85 x V  
ideal for on-board point-of-load and postregulation appli-  
cations, with total output error less than 1ꢀ over load,  
line, and temperature ranges.  
IN  
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 fre-  
quency minimizes the size of external components.  
o Soft-Start Reduces Inrush Supply Current  
o 250kHz to 1.2MHz Adjustable Switching or SYNC  
Input  
o Compatible with Ceramic, Polymer, and  
Electrolytic Output Capacitors  
o SYNCOUT Synchronizes 2nd Regulator 180°  
Out-of-Phase  
o 36-Pin, Lead-Free, 6mm x 6mm TQFN Package  
The on-board low R  
dual-nMOS design keeps  
DS(ON)  
the board cooler at heavy loads while minimizing the  
critical inductances, making the layout a much simpler  
task with respect to the discrete solutions.  
Ordering Information  
PIN-  
PACKAGE  
PART  
TEMP RANGE  
The MAX8654 comes with a high-bandwidth (20MHz)  
voltage-error amplifier. The voltage-mode control archi-  
tecture and the op-amp voltage-error amplifier permit a  
type 3 compensation scheme to be utilized to achieve  
maximum loop bandwidth, up to 20ꢀ of the switching  
frequency. High loop bandwidth achieves fast transient  
response resulting in less output capacitance required.  
MAX8654ETX+  
-40°C to +85°C  
36 TQFN-EP*  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
The MAX8654 offers programmable soft-start to accom-  
modate different types of output capacitors and reduce  
input inrush current. The MAX8654 is available in a 36-  
lead TQFN package.  
Typical Operating Circuit  
INPUT  
4.5V TO 14V  
IN  
BST  
OUTPUT  
UP TO 8A  
Applications  
POL Power Supplies  
Servers  
VP  
LX  
VL  
VL  
VDL  
PGND  
DDR Memory  
RAID Power Supplies  
Network Power Supplies  
Graphic Cards  
MAX8654  
FB  
FREQ  
ILIM  
REFIN  
SS  
COMP  
SYNC  
VL  
SYNCOUT  
IN  
PWRGD  
EN  
GND  
Pin Configuration appears at end of data sheet.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,  
or visit Maxim’s website at www.maxim-ic.com.  
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