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LM2574N-12 PDF预览

LM2574N-12

更新时间： 2024-11-22 22:22:07
品牌 Logo 应用领域
安森美 - ONSEMI 稳压器
页数 文件大小 规格书
24页 399K
描述
EASY SWITCHER 0.5 A STEP-DOWN VOLTAGE REGULATOR

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中文翻译

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LM2574N-12 技术参数

是否无铅： 含铅是否Rohs认证： 不符合
生命周期：Active零件包装代码：DIP
包装说明：DIP, DIP8,.3针数：8
Reach Compliance Code：not_compliantECCN代码：EAR99
HTS代码：8542.39.00.01风险等级：5.09
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：15 V
标称输入电压：25 VJESD-30 代码：R-PDIP-T8
JESD-609代码：e0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）：NOT SPECIFIED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：Tin/Lead (Sn/Pb)
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：NOT SPECIFIED
宽度：7.62 mmBase Number Matches：1

LM2574N-12 数据手册

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Order this document by LM2574/D  
EASY SWITCHER  
0.5 A STEP–DOWN  
VOLTAGE REGULATOR  
SEMICONDUCTOR  
TECHNICAL DATA  
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.  
DW SUFFIX  
PLASTIC PACKAGE  
CASE 751G  
16  
(SO–16L)  
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.  
N SUFFIX  
PLASTIC PACKAGE  
CASE 626  
(DIP–8)  
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 µA (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
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  
5
6
7
8
V
ON/OFF  
Pwr Gnd  
in  
• 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  
(Top View)  
1
2
3
4
8
7
6
5
*
FB  
Sig Gnd  
Output  
*
ON/OFF  
Pwr Gnd  
V
• Uses Readily Available Standard Inductors  
• Thermal Shutdown and Current Limit Protection  
in  
(Top View)  
Applications  
* No internal connection, but should be soldered to  
* PC board for best heat transfer.  
• Simple and High–Efficiency Step–Down (Buck) Regulators  
• Efficient Pre–regulator for Linear Regulators  
• On–Card Switching Regulators  
• Positive to Negative Converters (Buck–Boost)  
• Negative Step–Up Converters  
DEVICE TYPE/NOMINAL OUTPUT VOLTAGE  
LM2574–3.3  
LM2574–5  
3.3 V  
5.0 V  
LM2574–12  
LM2574–15  
LM2574–ADJ  
12 V  
15 V  
1.23 V to 37 V  
• Power Supply for Battery Chargers  
ORDERING INFORMATION  
Operating  
Temperature Range  
Device  
Package  
SO–16L  
DIP–8  
LM2574DW–ADJ  
LM2574N–XX  
T
= –40° to +125°C  
A
XX = Voltage Option, i.e, 3.3, 5, 12, 15 V; and ADJ for  
Adjustable Output.  
Motorola, Inc. 1999  
Rev 2, 07/1999  
1234567...24

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