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MAX1844ETP-T

更新时间： 2024-10-03 21:10:31
品牌 Logo 应用领域
美信 - MAXIM 信息通信管理开关
页数 文件大小 规格书
24页 854K
描述
Switching Controller, Current-mode, 3A, 600kHz Switching Freq-Max, BICMOS, 5 X 5 MM, 0.80 MM HEIGHT, THIN, QFN-20

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MAX1844ETP-T 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：QFN
包装说明：VQCCN, LCC20,.20SQ,25针数：20
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.21
其他特性：CAN ALSO OPERATE IN PFM MODE模拟集成电路 - 其他类型：SWITCHING CONTROLLER
控制模式：CURRENT-MODE控制技术：PULSE WIDTH MODULATION
最大输入电压：5.5 V最小输入电压：4.5 V
标称输入电压：5 VJESD-30 代码：S-XQCC-N20
JESD-609代码：e0长度：5 mm
湿度敏感等级：1功能数量：1
端子数量：20最高工作温度：85 °C
最低工作温度：-40 °C最大输出电流：3 A
封装主体材料：UNSPECIFIED封装代码：VQCCN
封装等效代码：LCC20,.20SQ,25封装形状：SQUARE
封装形式：CHIP CARRIER, VERY THIN PROFILE峰值回流温度（摄氏度）：245
认证状态：Not Qualified座面最大高度：0.8 mm
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：PUSH-PULL最大切换频率：600 kHz
技术：BICMOS温度等级：INDUSTRIAL
端子面层：Tin/Lead (Sn85Pb15)端子形式：NO LEAD
端子节距：0.65 mm端子位置：QUAD
处于峰值回流温度下的最长时间：NOT SPECIFIED宽度：5 mm
Base Number Matches：1

MAX1844ETP-T 数据手册

 浏览型号MAX1844ETP-T的Datasheet PDF文件第2页浏览型号MAX1844ETP-T的Datasheet PDF文件第3页浏览型号MAX1844ETP-T的Datasheet PDF文件第4页浏览型号MAX1844ETP-T的Datasheet PDF文件第5页浏览型号MAX1844ETP-T的Datasheet PDF文件第6页浏览型号MAX1844ETP-T的Datasheet PDF文件第7页 
19-1993; Rev 3; 9/02  
High-Speed Step-Down Controller with  
Accurate Current Limit for Notebook Computers  
General Description  
Features  
The MAX1844 pulse-width modulation (PWM) controller  
provides high efficiency, excellent transient response,  
and high DC output accuracy needed for stepping  
down high-voltage batteries to generate low-voltage  
CPU core or chipset/RAM supplies in notebook com-  
puters.  
o Ultra-High Efficiency  
o Accurate Current-Limit Option  
o Quick-PWM with 100ns Load-Step Response  
o 1% V Accuracy Over Line and Load  
OUT  
o 1.8V/2.5V Fixed or 1V to 5.5V Adjustable Output  
Maxim’s proprietary Quick-PWM™ quick-response,  
constant-on-time PWM control scheme handles wide  
input/output voltage ratios with ease and provides  
100ns “instant-on” response to load transients while  
maintaining a relatively constant switching frequency.  
Efficiency is enhanced by an ability to drive very large  
synchronous-rectifier MOSFETs. Accurate current sens-  
ing to ensure reliable overload protection is available  
using an external current-sense resistor in series with  
the synchronous rectifier. Alternatively, the synchronous  
rectifier itself can be used for less accurate current  
sensing at the lowest possible power dissipation.  
Range  
o 2V to 28V Battery Input Range  
o 200/300/450/600kHz Switching Frequency  
o Adjustable Overvoltage Protection  
o Adjustable Undervoltage Protection  
o 1.7ms Digital Soft-Start  
o Drives Large Synchronous-Rectifier FETs  
o 2V 1% Reference Output  
Single-stage buck conversion allows the MAX1844 to  
directly step down high-voltage batteries for the highest  
possible efficiency. Alternatively, two-stage conversion  
(stepping down the 5V system supply instead of the  
battery) at a higher switching frequency allows the mini-  
mum possible physical size.  
o Power-Good Window Comparator  
Ordering Information  
PART  
TEMP RANGE  
-40°C to +85°C  
-40°C to +85°C  
-40°C to +85°C  
PIN-PACKAGE  
20 QSOP  
MAX1844EEP  
MAX1844EGP*  
MAX1844ETP  
The MAX1844 is intended for CPU core, chipset,  
DRAM, or other low-voltage supplies as low as 1V. It is  
available in 20-pin QSOP, and QFN packages and  
includes both adjustable overvoltage and undervoltage  
protection.  
20 QFN  
20 Thin QFN  
Minimal Operating Circuit  
For a dual step-down PWM controller with accurate cur-  
rent limit, refer to the MAX1845. The MAX1714/ MAX1715  
single/dual PWM controllers are similar to the MAX1844/  
MAX1845 but do not use current-sense resistors.  
BATTERY  
4.5V TO 28V  
5V INPUT  
V
V
DD  
V+  
CC  
SHDN  
Applications  
UVP  
Notebook Computers  
BST  
DH  
ILIM  
CPU Core Supplies  
OUTPUT  
2.5V  
MAX1844  
REF  
Chipset/RAM Supplies as Low as 1V  
1.8V and 2.5V Supplies  
LX  
DL  
CS  
PGOOD  
LATCH  
OVP  
OUT  
*Contact factory for availability.  
FB  
SKIP  
Quick-PWM is a trademark of Maxim Integrated Products.  
Pin Configuration appears at end of data sheet.  
GND  
________________________________________________________________ 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...24

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