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MAX15041_11 PDF预览

MAX15041_11

更新时间: 2024-11-14 11:18:31
品牌 Logo 应用领域
美信 - MAXIM 稳压器
页数 文件大小 规格书
18页 1441K
描述
Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal

MAX15041_11 数据手册

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19-4815; Rev 3; 3/11  
Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM  
Step-Down DC-DC Regulator with Internal Switches  
MAX5041  
General Description  
Features  
o Up to 3A of Continuous Output Current  
The MAX15041 low-cost, synchronous DC-DC convert-  
er with internal switches delivers an output current up to  
3A. The MAX15041 operates from an input voltage of  
4.5V to 28V and provides an adjustable output voltage  
o ±±1 Output Aꢀꢀurꢁꢀc Oꢂer ꢃeꢄperꢁture  
o 4.5V to 28V Input Voltꢁge Rꢁnge  
o Adjustꢁble Output Voltꢁge Rꢁnge froꢄ 0.606V to  
from 0.6V to 90% of V , set with two external resistors.  
IN  
0.9 x V  
IN  
The MAX15041 is ideal for distributed power systems,  
preregulation, set-top boxes, television, and other con-  
sumer applications.  
o Internꢁl ±70ꢄR  
High-Side ꢁnd ±05ꢄΩ  
DS-ON  
R
Low-Side Power Switꢀhes  
DS-ON  
o Fixed 350kHz Switꢀhing Frequenꢀc  
o Up to 931 Effiꢀienꢀc  
o Ccꢀle-Bc-Ccꢀle Oꢂerꢀurrent Proteꢀtion  
o Progrꢁꢄꢄꢁble Soft-Stꢁrt  
o Stꢁble with Low-ESR Cerꢁꢄiꢀ Output Cꢁpꢁꢀitors  
o Sꢁfe Stꢁrtup into Prebiꢁsed Output  
o Enꢁble Input ꢁnd Power-Good Output  
The MAX15041 features a peak-current-mode PWM con-  
troller with internally fixed 350kHz switching frequency  
and a 90% maximum duty cycle. The current-mode con-  
trol architecture simplifies compensation design, and  
ensures a cycle-by-cycle current limit and fast response  
to line and load transients. A high-gain transconductance  
error amplifier allows flexibility in setting the external com-  
pensation by using a type II compensation scheme,  
thereby allowing the use of all ceramic capacitors.  
o Fullc Proteꢀted Agꢁinst Oꢂerꢀurrent ꢁnd  
Oꢂerteꢄperꢁture  
This synchronous buck regulator features internal  
MOSFETs that provide better efficiency than asynchro-  
nous solutions, while simplifying the design relative to  
discrete controller solutions. In addition to simplifying  
the design, the integrated MOSFETs minimize EMI,  
reduce board space, and provide higher reliability by  
minimizing the number of external components.  
o V  
LDO Underꢂoltꢁge Loꢀkout  
DD  
o Spꢁꢀe-Sꢁꢂing, ꢃherꢄꢁllc Enhꢁnꢀed, 3ꢄꢄ x 3ꢄꢄ  
Pꢁꢀkꢁge  
Ordering Information  
The MAX15041 also features thermal shutdown and  
overcurrent protection (high-side sourcing and low-side  
sinking), and an internal 5V LDO with undervoltage  
lockout. In addition, this device ensures safe startup  
when powering into a prebiased output.  
PIN-  
PACKAGE  
ꢃOP  
MARK  
PARꢃ  
ꢃEMP RANGE  
MAX15041ETE+ -40°C to +85°C 16 TQFN-EP*  
AGV  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
Other features include an externally adjustable soft-start  
that gradually ramps up the output voltage and reduces  
inrush current. Independent enable control and power-  
good signals allow for flexible power sequencing.  
Typical Operating Circuit  
INPUT  
12V  
The MAX15041 is available in a space-saving, high-  
power, 3mm x 3mm, 16-pin TQFN-EP package and is  
fully specified from -40°C to +85°C.  
IN  
BST  
OUTPUT  
EN  
1.8V AT 3A  
Applications  
MAX15041 LX  
Distributed Power Systems  
Wall Adapters  
V
DD  
PGND  
Preregulators  
Set-Top Boxes  
PGOOD  
SS  
FB  
Televisions  
PGOOD  
COMP  
xDSL Modems  
SGND  
Consumer Products  
________________________________________________________________ Mꢁxiꢄ Integrꢁted Produꢀts  
±
For priꢀing, deliꢂerc, ꢁnd ordering inforꢄꢁtion, pleꢁse ꢀontꢁꢀt Mꢁxiꢄ Direꢀt ꢁt ±-888-629-4642,  
or ꢂisit Mꢁxiꢄ’s website ꢁt www.ꢄꢁxiꢄ-iꢀ.ꢀoꢄ.  

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