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LM2574N-3.3G PDF预览

LM2574N-3.3G

更新时间： 2024-11-09 03:07:43
品牌 Logo 应用领域
安森美 - ONSEMI 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
26页 296K
描述
0.5 A, Adjustable Output Voltage, Step−Down Switching Regulator

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LM2574N-3.3G 技术参数

是否无铅： 不含铅是否Rohs认证： 符合
生命周期：Obsolete零件包装代码：DIP
包装说明：LEAD FREE, PLASTIC, DIP-8针数：8
Reach Compliance Code：unknownECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：5.07Is Samacsys：N
模拟集成电路 - 其他类型：SWITCHING REGULATOR控制模式：VOLTAGE-MODE
最大输入电压：40 V最小输入电压：4.75 V
标称输入电压：12 VJESD-30 代码：R-PDIP-T8
JESD-609代码：e3长度：9.78 mm
功能数量：1端子数量：8
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：1.8 A封装主体材料：PLASTIC/EPOXY
封装代码：DIP封装等效代码：DIP8,.3
封装形状：RECTANGULAR封装形式：IN-LINE
峰值回流温度（摄氏度）：260认证状态：Not Qualified
座面最大高度：4.45 mm子类别：Switching Regulator or Controllers
表面贴装：NO切换器配置：BUCK
最大切换频率：63 kHz技术：BIPOLAR
温度等级：AUTOMOTIVE端子面层：Matte Tin (Sn) - annealed
端子形式：THROUGH-HOLE端子节距：2.54 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：7.62 mmBase Number Matches：1

LM2574N-3.3G 数据手册

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LM2574, NCV2574  
0.5 A, Adjustable Output  
Voltage, Step−Down  
Switching Regulator  
The LM2574 series of regulators are monolithic integrated circuits  
ideally suited for easy and convenient design of a step−down  
switching regulator (buck converter). All circuits of this series are  
capable of driving a 0.5 A load with excellent line and load regulation.  
These devices are available in fixed output voltages of 3.3 V, 5.0 V,  
12 V, 15 V, and an adjustable output version.  
These regulators were designed to minimize the number of external  
components to simplify the power supply design. Standard series of  
inductors optimized for use with the LM2574 are offered by several  
different inductor manufacturers.  
http://onsemi.com  
SO−16 WB  
DW SUFFIX  
CASE 751G  
16  
1
Since the LM2574 converter is a switch−mode power supply, its  
efficiency is significantly higher in comparison with popular  
three−terminal linear regulators, especially with higher input voltages.  
In most cases, the power dissipated by the LM2574 regulator is so low,  
that the copper traces on the printed circuit board are normally the only  
heatsink needed and no additional heatsinking is required.  
PDIP−8  
N SUFFIX  
CASE 626  
8
1
The LM2574 features include a guaranteed 4% tolerance on output  
voltage within specified input voltages and output load conditions, and  
10% on the oscillator frequency ( 2% over 0°C to +125°C). External  
shutdown is included, featuring 60 mA (typical) standby current. The  
output switch includes cycle−by−cycle current limiting, as well as  
thermal shutdown for full protection under fault conditions.  
PIN CONNECTIONS  
*
1
2
3
4
5
6
7
8
16  
15  
14  
13  
12  
11  
10  
9
*
*
*
FB  
Output  
*
Features  
Sig Gnd  
• 3.3 V, 5.0 V, 12 V, 15 V, and Adjustable Output Versions  
• Adjustable Version Output Voltage Range, 1.23 to 37 V 4% max  
over Line and Load Conditions  
• Guaranteed 0.5 A Output Current  
• Wide Input Voltage Range: 4.75 to 40 V  
• Requires Only 4 External Components  
• 52 kHz Fixed Frequency Internal Oscillator  
• TTL Shutdown Capability, Low Power Standby Mode  
• High Efficiency  
• Uses Readily Available Standard Inductors  
• Thermal Shutdown and Current Limit Protection  
• NCV Prefix for Automotive and Other Applications Requiring Site  
and Control Changes  
V
ON/OFF  
in  
Pwr Gnd  
*
*
*
*
*
(Top View)  
1
2
3
4
8
7
6
5
*
FB  
Sig Gnd  
ON/OFF  
Output  
*
V
Pwr Gnd  
in  
(Top View)  
* No internal connection, but should be soldered to  
* PC board for best heat transfer.  
• Pb−Free Packages are Available*  
Applications  
ORDERING INFORMATION  
• Simple and High−Efficiency Step−Down (Buck) Regulators  
• Efficient Pre−regulator for Linear Regulators  
• On−Card Switching Regulators  
See detailed ordering and shipping information in the package  
dimensions section on page 24 of this data sheet.  
DEVICE MARKING INFORMATION  
See general marking information in the device marking  
section on page 24 of this data sheet.  
• Positive to Negative Converters (Buck−Boost)  
• Negative Step−Up Converters  
• Power Supply for Battery Chargers  
*For additional information on our Pb−Free strategy and soldering details, please download the ON Semiconductor Soldering and Mounting  
Techniques Reference Manual, SOLDERRM/D.  
© Semiconductor Components Industries, LLC, 2006  
1
Publication Order Number:  
August, 2006 − Rev. 8  
LM2574/D  
1234567...26

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LM2574N-3.3G 替代型号

型号 品牌 替代类型 描述 数据表
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