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MAX15034

更新时间： 2024-11-14 11:18:31
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
26页 324K
描述
Configurable, Single-/Dual-Output, Synchronous Buck Controller for High-Current Applications

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MAX15034 数据手册

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19-4218; Rev 1; 10/11  
Configurable, Single-/Dual-Output, Synchronous  
Buck Controller for High-Current Applications  
MAX15034  
General Description  
Features  
The MAX15034 two-phase, configurable single- or dual-  
output buck controller has an input voltage range of  
4.75V to 5.5V or 5V to 28V. A mode select input allows  
for a dual-output supply or connecting two phases  
together for a single-output, high-current supply. Each  
output channel of the MAX15034 drives n-channel  
MOSFETs and is capable of providing more than 25A of  
load current. The MAX15034 uses average current-  
mode control with a switching frequency up to 1MHz  
per phase where each phase is 180° out of phase with  
respect to the other. Out-of-phase operation results in  
significantly reduced input capacitor ripple current and  
output voltage ripple in dual-phase, single-output volt-  
age applications. Each controller has its own high-per-  
formance current and voltage-error amplifier that can  
be compensated for optimum output filter L-C values  
and transient response.  
o 4.75V to 5.5V or 5V to 28V Input  
o Dual-Output Synchronous Buck Controller  
o Configurable for Two Separate Outputs (25A) or  
One Single Output (50A)  
o Average Current-Mode Control with Accurate  
Adjustable Current Limit  
o 180° Interleaved Operation Reduces Size of Input  
Filter Capacitors  
o Limits Reverse Current Sinking When Operated in  
Parallel Mode  
o Each Output is Adjustable from 0.61V to 5.5V  
o Independently Programmable Adaptive Voltage  
Positioning  
o Monotonic Startup into Prebiased Outputs  
o Independent Shutdown for Each Output  
The MAX15034 offers two enable inputs with accurate  
turn-on thresholds to allow for output voltage sequencing  
of the two outputs. The device’s switching frequency can  
be programmed from 100kHz to 1MHz with an external  
resistor. The MAX15034 can be synchronized to an  
external clock. Each output voltage is adjustable from  
0.61V to 5.5V. Additional features include thermal shut-  
down and hiccup-mode, short-circuit protection. Use the  
MAX15034 with adaptive voltage positioning for applica-  
tions that require a fast transient response or accurate  
output voltage regulation.  
o 100kHz to 1MHz per Phase Programmable  
Switching Frequency  
o Oscillator Frequency Synchronization from  
200kHz to 2MHz  
o Digital Soft-Start on Outputs  
o Hiccup-Mode Overcurrent Protection  
o Overtemperature Shutdown  
The MAX15034 is available in a thermally enhanced 28-  
pin TSSOP package capable of dissipating 2.1W. The  
device is rated for operation over the -40°C to +125°C  
automotive temperature range.  
o Thermally Enhanced 28-Pin TSSOP Package  
Capable of Dissipating 2.1W  
Applications  
Ordering Information  
High-End Computers/Workstations/Servers  
PART  
TEMP RANGE  
-40°C to +125°C  
-40°C to +125°C  
-40°C to +125°C  
PIN-PACKAGE  
28 TSSOP  
Graphics Cards  
MAX15034AAUI+  
MAX15034BAUI+  
MAX15034BAUI/V+  
Networking Systems  
28 TSSOP-EP*  
28 TSSOP-EP*  
Point-of-Load High-Current/High-Density  
Telecom DC-DC Regulators  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
RAID Systems  
/V Denotes an automotive qualified part.  
________________________________________________________________ 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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