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MAX16955_12

更新时间： 2024-11-05 11:59:11
品牌 Logo 应用领域
美信 - MAXIM 控制器
页数 文件大小 规格书
26页 2130K
描述
36V, 1MHz Step-Down Controller with Low Operating Current

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MAX16955_12 数据手册

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EVALUATION KIT AVAILABLE  
MAX16955  
36V, 1MHz Step-Down Controller  
with Low Operating Current  
General Description  
Features  
o Wide 3.5V to 36V Input Voltage Range  
o 42V Input Transient Tolerance  
The MAX16955 is a current-mode, synchronous PWM  
step-down controller designed to operate with input volt-  
ages from 3.5V to 36V while using only 50µA of quies-  
cent current at no load. The switching frequency is  
adjustable from 220kHz to 1MHz by an external resistor  
and can be synchronized to an external clock up to  
1.1MHz. The MAX16955 output voltage is pin program-  
mable to be either 5V fixed, or adjustable from 1V to  
10V. The wide input voltage range, along with its ability  
to operate in dropout during undervoltage transients,  
makes it ideal for automotive and industrial applications.  
o High Duty Cycle During Undervoltage Transients  
o 220kHz to 1MHz Adjustable Switching Frequency  
o Current-Mode Control Architecture  
o Adjustable (1V to 10V) Output Voltage with 2ꢀ  
Accuracy  
o Three Operating Modes  
50µA Ultra-Low Quiescent Current Skip Mode  
Forced Fixed-Frequency Mode  
External Frequency Synchronization  
The MAX16955 operates in fixed-frequency PWM mode  
and low quiescent current skip mode. It features an  
enable logic input, which is compatible up to 42V to  
disable the device and reduce its shutdown current to  
10µA. Protection features include overcurrent limit,  
overvoltage, undervoltage, and thermal shutdown with  
automatic recovery. The device also features a power-  
good monitor to ease power-supply sequencing.  
o Lowest BOM Count, Current-Mode Control  
Architecture  
o Power-Good Output  
o Enable Input Compatible from 3.3V Logic Level to  
42V  
o Current-Limit, Thermal Shutdown, and  
Overvoltage Protection  
The MAX16955 is available in a thermally enhanced 16-  
pin TSSOP package with exposed pad and is specified  
for operation over the -40°C to +125°C automotive tem-  
perature range.  
o -40°C to +125°C Automotive Temperature Range  
o Automotive Qualified  
Typical Operating Circuit  
Applications  
V
BAT  
Automotive  
Industrial  
C
IN  
NH  
C
BST  
SUP  
DH  
COMP  
BST  
LX  
Military  
L
R
COMP  
C
Point of Load  
COMP2  
MAX16955  
C
COMP1  
Ordering Information  
R
SENSE  
DL  
NL  
PGOOD  
EN  
PART  
TEMP RANGE  
PIN-PACKAGE  
PGND  
MAX16955AUE/V+  
-40°C to +125°C  
16 TSSOP-EP*  
FSYNC  
CS  
OUT  
FB  
/V denotes an automotive qualified part.  
+Denotes a lead(Pb)-free/RoHS-compliant package.  
*EP = Exposed pad.  
V
OUT  
5V  
FOSC  
C
OUT  
BIAS  
R
FOSC  
SGND  
C
L
For pricing, delivery, and ordering information, please contact Maxim Direct  
at 1-888-629-4642, or visit Maxim’s website at www.maximintegrated.com.  
19-5781; Rev 1; 9/12  
1234567...26

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