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MAX1623EAP+T

更新时间： 2024-02-28 11:04:42
品牌 Logo 应用领域
美信 - MAXIM 稳压器开关
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MAX1623EAP+T 数据手册

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19-1436; Rev 1; 9/99  
3A, Low-Voltage, Step-Down Regulator with  
Synchronous Rectification and Internal Switches  
MAX1623  
General Description  
____________________________Features  
The MAX1623 switch-mode buck regulator with syn-  
chronous rectification provides local CPU and bus-ter-  
mination power in notebook and desktop computers.  
An internal 55mΩ (typ), 3A PMOS power switch and  
60mΩ (typ), 3A NMOS synchronous-rectifier switch  
deliver continuous load currents up to 3A from a 5V  
supply with 95% typical efficiency. Output accuracy is  
1%, including line and load regulation.  
♦ ±1% Output Accuracy, Including Line and Load  
Regulation  
♦ 94% Efficiency  
♦ Internal Switches  
55mΩ PMOS Power Switch  
60mΩ NMOS Synchronous-Rectifier Switch  
♦ Guaranteed 3A Load Capability  
♦ Minimal External Components  
The MAX1623 features constant-off-time, current-mode  
pulse-width-modulation (PWM) control with switching  
frequencies as high as 350kHz. An external resistor at  
the TOFF pin sets the off-time, allowing optimum design  
flexibility in terms of switching frequency, output switch-  
ing noise, and inductor size. This device is available in  
a space-saving 20-pin SSOP package.  
♦ Pin-Selectable Fixed 3.3V, 2.5V, or  
Adjustable (1.1V to 3.8V) Output Voltage  
♦ +4.5V to +5.5V Input Voltage Range  
♦ 400µA (typ) Supply Current  
♦ <1µA Shutdown Supply Current  
♦ Constant-Off-Time PWM Operation  
♦ Switching Frequencies Up to 350kHz  
♦ Idle Mode™ Operation at Light Loads  
♦ Thermal Shutdown Protection  
♦ Available in 20-Pin SSOP  
________________________Applications  
5V to 3.3V Conversion  
Notebook Computer CPU I/O Supply  
Desktop Computer Bus-Termination Supply  
CPU Daughter Card Supply  
DSP Supply  
Ordering Information  
PART  
TEMP. RANGE  
PIN-PACKAGE  
MAX1623EAP  
-40°C to +85°C  
20 SSOP  
Typical Operating Circuit  
Pin Configuration  
TOP VIEW  
+2.5V  
OUTPUT  
+5V  
INPUT  
IN  
LX  
LX  
IN  
1
2
3
4
5
6
7
8
9
20 LX  
19 PGND  
18 LX  
MAX1623  
LX  
V
CC  
IN  
17 PGND  
PGND  
FBSEL  
SHDN  
MAX1623  
LX  
16 LX  
IN  
15 PGND  
FB  
SHDN  
FBSEL  
TOFF  
14 V  
CC  
TOFF  
COMP REF  
GND  
13 COMP  
12 REF  
FB 10  
11 GND  
SSOP  
Idle Mode is a trademark of Maxim Integrated Products.  
________________________________________________________________ Maxim Integrated Products  
1
For free samples & the latest literature: http://www.maxim-ic.com, or phone 1-800-998-8800.  
For small orders, phone 1-800-835-8769.  
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MAX1623EAP+T 替代型号

型号 品牌 替代类型 描述 数据表
MAX1623EAP+ MAXIM

类似代替

 Switching Regulator, Current-mode, 5.5A, 350kHz Switching Freq-Max, CMOS, PDSO20, SSOP-20
MAX1623EAP MAXIM

类似代替

 3A, Low-Voltage, Step-Down Regulator with Synchronous Rectification and Internal Switches
MAX1623EAP-T MAXIM

功能相似

 Switching Regulator, Current-mode, 5.5A, 350kHz Switching Freq-Max, CMOS, PDSO20, SSOP-20

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