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MAX1742EEE

更新时间： 2024-11-13 22:57:59
品牌 Logo 应用领域
美信 - MAXIM 稳压器开关式稳压器或控制器电源电路开关式控制器光电二极管
页数 文件大小 规格书
16页 597K
描述
1A/2.7A, 1MHz, Step-Down Regulators with Synchronous Rectification and Internal Switches

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MAX1742EEE 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Obsolete零件包装代码：SOIC
包装说明：QSOP-16针数：16
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.15
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：CURRENT-MODE
控制技术：CONSTANT OFF TIME最大输入电压：5.5 V
最小输入电压：3 V标称输入电压：3.3 V
JESD-30 代码：R-PDSO-G16JESD-609代码：e0
长度：4.9 mm湿度敏感等级：1
功能数量：1端子数量：16
最高工作温度：85 °C最低工作温度：-40 °C
最大输出电流：4.7 A封装主体材料：PLASTIC/EPOXY
封装代码：SSOP封装等效代码：SSOP16,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, SHRINK PITCH
峰值回流温度（摄氏度）：240认证状态：Not Qualified
座面最大高度：1.75 mm子类别：Switching Regulator or Controllers
表面贴装：YES切换器配置：BUCK
最大切换频率：1000 kHz技术：CMOS
温度等级：INDUSTRIAL端子面层：Tin/Lead (Sn85Pb15)
端子形式：GULL WING端子节距：0.635 mm
端子位置：DUAL处于峰值回流温度下的最长时间：20
宽度：3.9 mmBase Number Matches：1

MAX1742EEE 数据手册

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19-1760; Rev 1; 2/02  
1A/2.7A, 1MHz, Step-Down Regulators with  
Synchronous Rectification and Internal Switches  
General Description  
Features  
The MAX1742/MAX1842 constant-off-time, pulse-width-  
modulated (PWM) step-down DC-DC converters are ideal  
for use in 5V and 3.3V to low-voltage conversion neces-  
sary in notebook and subnotebook computers. These  
devices feature internal synchronous rectification for high  
efficiency and reduced component count. They require  
no external Schottky diode. The internal 90mΩ PMOS  
power switch and 70mΩ NMOS synchronous-rectifier  
switch easily deliver continuous load currents up to 1A.  
The MAX1742/MAX1842 produce a preset 2.5V, 1.8V, or  
1.5V output voltage or an adjustable output from 1.1V to  
o
1ꢀ% OutOu%ꢁAAOꢂrAc  
o 95ꢀ%EffiAienAc  
o Inueꢂnrl%PM S%rnd%NM S%SwiuAhes  
90mΩ  n-ResisurnAe%ru%V =%4.5V%  
110mΩ  n-ResisurnAe%ru%V =%3V  
IN  
IN  
o  OutOu%Volurge  
2.5V,%1.8V,%oꢂ%1.5V%Pin%SeleAurble  
1.1V%uo%V ꢁdjOsurble  
IN  
o 3V%uo%5.5V%IntOu%Volurge%Rrnge  
V . They achieve efficiencies as high as 95%.  
IN  
o 600µꢁ%(mrx)% teꢂruing%SOttlc%COꢂꢂenu  
o <1µꢁ%ShOudown%SOttlc%COꢂꢂenu  
o Pꢂogꢂrmmrble%Consurnu- ff-Time% teꢂruion  
o 1MHz%(mrx)%SwiuAhing%FꢂeqOenAc  
o Idle-Mode% teꢂruion%ru%Lighu%Lords  
o Theꢂmrl%ShOudown%  
The MAX1742/MAX1842 use a unique current-mode,  
constant-off-time, PWM control scheme, which includes  
Idle Mode™ to maintain high efficiency during light-load  
operation. The programmable constant-off-time architec-  
ture sets switching frequencies up to 1MHz, allowing the  
user to optimize performance trade-offs between effi-  
ciency, output switching noise, component size, and  
cost. Both devices are designed for continuous output  
currents up to 1A. The MAX1742 uses a peak current  
limit of 1.3A (min) and is suitable for applications requir-  
ing small external component size and high efficiency.  
The MAX1842 has a higher current limit of 3.1A (min)  
and is intended for applications requiring an occasional  
burst of output current up to 2.7A. Both devices also fea-  
ture an adjustable soft-start to limit surge currents during  
startup, a 100% duty cycle mode for low-dropout opera-  
tion, and a low-power shutdown mode that disconnects  
the input from the output and reduces supply current  
below 1µA. The MAX1742/MAX1842 are available in 16-  
pin QSOP packages.  
o ꢁdjOsurble%Sofu-Surꢂu%InꢂOsh%COꢂꢂenu%Limiuing  
o 100ꢀ%DOuc%CcAle%DOꢂing%Low-DꢂotoOu% teꢂruion  
o  OutOu%Shoꢂu-CiꢂAOiu%PꢂoueAuion  
o 16-Pin%QS P%PrAkrge  
Ordering Information  
PꢁRT  
TEMP%RꢁNGE  
-40°C to +85°C  
-40°C to +85°C  
PIN-PꢁCKꢁGE  
MꢁX1742EEE  
MꢁX1842EEE  
16 QSOP  
16 QSOP  
For similar devices that provide continuous output cur-  
rents up to 2A and 3A, refer to the MAX1644 and  
MAX1623 data sheets.  
Typical Configuration  
Applications  
5V or 3.3V to Low-Voltage Conversion  
CPU I/O Ring  
OUTPUT  
INPUT  
3V TO  
5.5V  
1.1V TO  
IN  
LX  
FB  
V
IN  
10Ω  
MAX1742  
MAX1842  
Chipset Supplies  
Notebook and Subnotebook Computers  
V
PGND  
GND  
FBSEL  
REF  
CC  
470pF  
2.2µF  
SHDN  
COMP  
TOFF  
Pin Configuration appears at end of data sheet.  
1µF  
SS  
0.01µF  
Idle Mode is a trademark of Maxim Integrated Products.  
________________________________________________________________ Maxim Integrated Products  
1
For pricing, delivery, and ordering information, please contact Maxim/Dallas Direct! at  
1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com.  
1234567...16

中文翻译

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MAX1742EEE 替代型号

型号 品牌 替代类型 描述 数据表
MAX1742EEE+ MAXIM

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