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LM2734ZSD PDF预览

LM2734ZSD

更新时间: 2024-09-16 11:34:19
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信息通信管理
页数 文件大小 规格书
19页 772K
描述
Thin SOT23 1A Load Step-Down DC-DC Regulator

LM2734ZSD 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:3 X 3 MM, LEAD FREE, LLP-6Reach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.11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:S-XDSO-N6
JESD-609代码:e0长度:3 mm
湿度敏感等级:3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:UNSPECIFIED封装代码:VSON
封装等效代码:SOLCC6,.11,37封装形状:SQUARE
封装形式:SMALL OUTLINE, VERY THIN PROFILE峰值回流温度(摄氏度):260
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:BUCK最大切换频率:3600 kHz
技术:BICMOS温度等级:AUTOMOTIVE
端子面层:Tin/Lead (Sn/Pb)端子形式:NO LEAD
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:3 mm
Base Number Matches:1

LM2734ZSD 数据手册

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March 2005  
LM2734Z  
Thin SOT23 1A Load Step-Down DC-DC Regulator  
General Description  
Features  
n Thin SOT23-6 package, or 6 lead LLP package  
n 3.0V to 20V input voltage range  
n 0.8V to 18V output voltage range  
n 1A output current  
The LM2734Z regulator is a monolithic, high frequency,  
PWM step-down DC/DC converter assembled in a 6-pin Thin  
SOT23 and LLP non pull back package. It provides all the  
active functions to provide local DC/DC conversion with fast  
transient response and accurate regulation in the smallest  
possible PCB area.  
n 3MHz switching frequency  
n 300mNMOS switch  
n 30nA shutdown current  
n 0.8V, 2% internal voltage reference  
n Internal soft-start  
With a minimum of external components and online design  
support through WEBENCH® , the LM2734Z is easy to  
use. The ability to drive 1A loads with an internal 300mΩ  
NMOS switch using state-of-the-art 0.5µm BiCMOS technol-  
ogy results 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 3MHz, allowing the use of extremely small  
surface mount inductors and chip capacitors. Even though  
the operating frequency is very high, efficiencies up to 85%  
are easy to achieve. External shutdown is included, featuring  
an ultra-low stand-by current of 30nA. The LM2734Z utilizes  
current-mode control and internal compensation to provide  
high-performance regulation over a wide range of operating  
conditions. Additional features include internal soft-start cir-  
cuitry to reduce inrush current, pulse-by-pulse current limit,  
thermal shutdown, and output over-voltage protection.  
n Current-Mode, PWM operation  
n Thermal shutdown  
Applications  
n DSL Modems  
n Local Point of Load Regulation  
n Battery Powered Devices  
n USB Powered Devices  
Typical Application Circuit  
Efficiency vs Load Current  
VIN = 5V, VOUT = 3.3V  
20130301  
20130345  
WEBENCH is a trademark of Transim.  
© 2005 National Semiconductor Corporation  
DS201303  
www.national.com  

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