Datasheet > LM3743MM-300

LM3743MM-300

更新时间： 2024-11-07 02:59:47

品牌	Logo	应用领域
美国国家半导体 - NSC		控制器
页数	文件大小	规格书
23页	1143K
描述
N-Channel FET Synchronous Buck Controller for Low Output Voltages

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LM3743MM-300 技术参数

是否Rohs认证：	不符合	生命周期：	Transferred
包装说明：	PLASTIC, MSOP-10	Reach Compliance Code：	not_compliant
ECCN代码：	EAR99	HTS代码：	8542.39.00.01
风险等级：	5.21	模拟集成电路 - 其他类型：	SWITCHING CONTROLLER
控制模式：	VOLTAGE-MODE	控制技术：	PULSE WIDTH MODULATION
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：	S-PDSO-G10
JESD-609代码：	e0	长度：	3 mm
湿度敏感等级：	1	功能数量：	1
端子数量：	10	最高工作温度：	125 °C
最低工作温度：	-40 °C	封装主体材料：	PLASTIC/EPOXY
封装代码：	TSSOP	封装等效代码：	TSSOP10,.19,20
封装形状：	SQUARE	封装形式：	SMALL OUTLINE, THIN PROFILE, SHRINK PITCH
峰值回流温度（摄氏度）：	260	认证状态：	Not Qualified
座面最大高度：	1.09 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：	345 kHz	温度等级：	AUTOMOTIVE
端子面层：	Tin/Lead (Sn/Pb)	端子形式：	GULL WING
端子节距：	0.5 mm	端子位置：	DUAL
处于峰值回流温度下的最长时间：	40	宽度：	3 mm
Base Number Matches：	1

LM3743MM-300 数据手册

September 2006

LM3743

N-Channel FET Synchronous Buck Controller for Low

Output Voltages

n Reference accuracy: 1.75%, over full temperature and

input voltage range

General Description

The LM3743 is a voltage mode PWM buck controller which

n Low-side sensing programmable current limit

implements synchronous rectification. It provides a low cost,

n Fixed high-side sensing for supplemental short-circuit

fault tolerant, and efficient point of load solution. To reduce

protection

component count several parameters are fixed, such as

switching frequency and the short circuit protection level. For

n Undervoltage protection

n Hiccup mode protection eliminates thermal runaway

during fault conditions

n Externally programmable soft-start with tracking

capability

n Switching frequency options of 1 MHz or 300 kHz

n Pre-bias start-up capability

example the LM3743 has an operating switching frequency

of 300 kHz or 1 MHz and a fixed 500 mV high side current

limit for switch node short-circuit protection. LM3743 is a

very fault tolerant IC with switch node short-circuit, output

undervoltage protection, and the ability to self recover after

the removal of the fault. It avoids the need to over design

components due to thermal runaway during a fault condition,

thus resulting in a lower cost solution. It employs a propri-

etary monotonic glitch free pre-bias start-up method suited

for FPGAs and ASIC logic devices. A 0.8V internal reference

with 1.75% accuracy is ideal for sub-volt conversion. An

external programmable soft-start allows for tracking and tim-

ing flexibility. The driver features 1.6Ω of pull-up resistance

and 1Ω of pull-down drive resistance for high power density

and very efficient power processing.

n MSOP-10 package

Applications

n ASIC/FPGA/DSP core power

n Broadband Communications

n Multi-media Set Top Boxes

n Networking Equipment

n Printers/Scanners

n Servers

n Low Voltage Distributed Power

Features

n Input voltage from 3.0V to 5.5V

n Output voltage adjustable down to 0.8V

Typical Application

20177401

DS201774

www.national.com

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中文翻译

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与LM3743MM-300相关器件

型号	品牌	获取价格	描述	数据表
LM3743MM-300/NOPB	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3743MMX-1000	NSC	获取价格	N-Channel FET Synchronous Buck Controller for Low Output Voltages
LM3743MMX-1000/NOPB	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3743MMX-300	NSC	获取价格	N-Channel FET Synchronous Buck Controller for Low Output Voltages
LM3743MMX-300/NOPB	TI	获取价格	High-Performance Synchronous Buck Controller with Comprehensive Fault Protection Features
LM3753	NSC	获取价格	Scalable 2-Phase Synchronous Buck Controllers with Integrated FET Drivers and Linear Regul
LM3753	TI	获取价格	LM3753 Scalable 2-Phase Synchronous Buck Controller with Integrated FET Drivers and Linear
LM3753_1	NSC	获取价格	Evaluation Board evaluation board is designed to provide
LM3753SQ	NSC	获取价格	Scalable 2-Phase Synchronous Buck Controllers with Integrated FET Drivers and Linear Regul
LM3753SQ/NOPB	TI	获取价格	Scalable 2-Phase Synchronous Buck Controllers with Integrated FET Drivers & Linear

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