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LM2734YMK PDF预览

LM2734YMK

更新时间: 2024-11-24 22:13:27
品牌 Logo 应用领域
美国国家半导体 - NSC 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信息通信管理
页数 文件大小 规格书
22页 455K
描述
Thin SOT23 1A Load Step-Down DC-DC Regulator

LM2734YMK 技术参数

是否Rohs认证:不符合生命周期:Transferred
包装说明:TSOT-23, 6 PINReach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:3.02Is Samacsys:N
其他特性:ALSO OPERATES IN ADJUSTABLE MODE FROM 0.8 TO 18V模拟集成电路 - 其他类型:SWITCHING REGULATOR
控制模式:CURRENT-MODE控制技术:PULSE WIDTH MODULATION
最大输入电压:20 V最小输入电压:3 V
标称输入电压:5 VJESD-30 代码:R-PDSO-G6
JESD-609代码:e0长度:2.97 mm
湿度敏感等级:1功能数量:1
端子数量:6最高工作温度:125 °C
最低工作温度:-40 °C最大输出电流:2.5 A
封装主体材料:PLASTIC/EPOXY封装代码:VSSOP
封装等效代码:TSOP6,.11,37封装形状:RECTANGULAR
封装形式:SMALL OUTLINE, VERY 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 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:660 kHz
技术:BICMOS温度等级:AUTOMOTIVE
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:0.95 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:1.65 mm
Base Number Matches:1

LM2734YMK 数据手册

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October 2004  
LM2734  
Thin SOT23 1A Load Step-Down DC-DC Regulator  
General Description  
Features  
n Thin SOT23-6 package  
n 3.0V to 20V input voltage range  
n 0.8V to 18V output voltage range  
n 1A output current  
The LM2734 regulator is a monolithic, high frequency, PWM  
step-down DC/DC converter in a 6-pin Thin SOT23 package.  
It provides all the active functions to provide local DC/DC  
conversion with fast transient response and accurate regu-  
lation in the smallest possible PCB area.  
n 550kHz (LM2734Y) and 1.6MHz (LM2734X)  
switching frequencies  
n 300mNMOS switch  
With a minimum of external components and online design  
support through WEBENCH , the LM2734 is easy to use.  
The ability to drive 1A loads with an internal 300mNMOS  
switch using state-of-the-art 0.5µm BiCMOS technology re-  
sults in the best power density available. The world class  
control circuitry allows for on-times as low as 13ns, thus  
supporting exceptionally high frequency conversion over the  
entire 3V to 20V input operating range down to the minimum  
output voltage of 0.8V. Switching frequency is internally set  
to 550kHz (LM2734Y) or 1.6MHz (LM2734X), allowing the  
use of extremely small surface mount inductors and chip  
capacitors. Even though the operating frequencies are very  
high, efficiencies up to 90% are easy to achieve. External  
shutdown is included, featuring an ultra-low stand-by current  
of 30nA. The LM2734 utilizes current-mode control and in-  
ternal compensation to provide high-performance regulation  
over a wide range of operating conditions. Additional fea-  
tures include internal soft-start circuitry to reduce inrush  
current, pulse-by-pulse current limit, thermal shutdown, and  
output over-voltage protection.  
n 30nA shutdown current  
n 0.8V, 2% internal voltage reference  
n Internal soft-start  
n Current-Mode, PWM operation  
n WEBENCH online design tool  
Applications  
n Local Point of Load Regulation  
n Core Power in HDDs  
n Set-Top Boxes  
n Battery Powered Devices  
n USB Powered Devices  
n DSL Modems  
n Notebook Computers  
Typical Application Circuit  
Efficiency vs Load Current  
VIN = 5V, VOUT = 3.3V  
20102301  
20102345  
WEBENCH is a trademark of Transim.  
© 2004 National Semiconductor Corporation  
DS201023  
www.national.com  

LM2734YMK 替代型号

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