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LM20333MH PDF预览

LM20333MH

更新时间： 2024-11-12 04:20:15
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器
页数 文件大小 规格书
20页 518K
描述
36V, 3A PowerWise㈢ Synchronous Buck Regulator with Frequency Synchronization

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中文翻译

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LM20333MH 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：TSSOP-20Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.13其他特性：OUTPUT VOLTAGE IS ADJUSTABLE UPTO 0.8V
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：36 V
最小输入电压：4.5 V标称输入电压：12 V
JESD-30 代码：R-PDSO-G20JESD-609代码：e0
长度：6.5 mm湿度敏感等级：1
功能数量：1端子数量：20
最高工作温度：125 °C最低工作温度：-40 °C
最大输出电流：6 A封装主体材料：PLASTIC/EPOXY
封装代码：HSSOP封装等效代码：TSSOP20,.25
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, SHRINK PITCH
峰值回流温度（摄氏度）：260认证状态：Not Qualified
子类别：Switching Regulator or Controllers表面贴装：YES
切换器配置：BUCK最大切换频率：240 kHz
温度等级：AUTOMOTIVE端子面层：Tin/Lead (Sn85Pb15)
端子形式：GULL WING端子节距：0.65 mm
端子位置：DUAL处于峰值回流温度下的最长时间：40
宽度：4.4 mmBase Number Matches：1

LM20333MH 数据手册

 浏览型号LM20333MH的Datasheet PDF文件第2页浏览型号LM20333MH的Datasheet PDF文件第3页浏览型号LM20333MH的Datasheet PDF文件第4页浏览型号LM20333MH的Datasheet PDF文件第5页浏览型号LM20333MH的Datasheet PDF文件第6页浏览型号LM20333MH的Datasheet PDF文件第7页 
June 2, 2008  
LM20333  
36V, 3A PowerWise® Synchronous Buck Regulator with  
Frequency Synchronization  
General Description  
Features  
The LM20333 is a full featured synchronous buck regulator  
capable of delivering up to 3A of load current. The current  
mode control loop is externally compensated with only two  
components, offering both high performance and ease of use.  
The device is optimized to work over the input voltage range  
of 4.5V to 36V making it well suited for high voltage systems.  
4.5V to 36V input voltage range  
■
■
3A output current, 5.2A peak current  
130 mΩ/110 mΩ integrated power MOSFETs  
94% peak efficiency with synchronous rectification  
1.5% feedback voltage accuracy  
■
■
■
■
■
■
■
■
■
■
■
Current mode control, selectable compensation  
Oscillator synchronization from 250kHz to 1.5MHz  
Adjustable output voltage down to 0.8V  
Compatible with pre-biased loads  
The device features internal Over Voltage Protection (OVP)  
and Over Current Protection (OCP) circuits for increased sys-  
tem reliability. A precision Enable pin and integrated UVLO  
allows the turn on of the device to be tightly controlled and  
sequenced. Startup inrush currents are limited by both an in-  
ternally fixed and externally adjustable soft-start circuit. Fault  
detection and supply sequencing are possible with the inte-  
grated power good (PGOOD) circuit.  
Programmable soft-start with external capacitor  
Precision enable pin with hysteresis  
OVP, UVLO inputs and PGOOD output  
The LM20333 is designed to work well in multi-rail power  
supply architectures. The output voltage of the device can be  
configured to track a higher voltage rail using the SS/TRK pin.  
If the output of the LM20333 is pre-biased at startup it will not  
sink current to pull the output low until the internal soft-start  
ramp exceeds the voltage at the feedback pin.  
Internally protected with peak current limit, thermal  
shutdown and restart  
Accurate current limit minimizes inductor size  
Non-linear current mode slope compensation  
eTSSOP-20 exposed pad package  
■
■
■
The switching frequency of the LM20333 can be synchro-  
nized to an external clock by use of the SYNC pin. The SYNC  
pin is capable of synchronizing to input signals ranging from  
250 kHz to 1.5 MHz.  
Applications  
Simple to design, high efficiency point of load regulation  
■
from a 4.5V to 36V bus  
The LM20333 is offered in an exposed pad 20-pin eTSSOP  
package that can be soldered to the PCB, eliminating the  
need for bulky heatsinks.  
High Performance DSPs, FPGAs, ASICs and  
Microprocessors  
Communications Infrastructure, Automotive  
■
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Simplified Application Circuit  
30051601  
®
PowerWise is a registered trademark of National Semiconductor Corporation.  
© 2008 National Semiconductor Corporation  
300516  
www.national.com  
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LM20333MH 替代型号

型号 品牌 替代类型 描述 数据表
LM20333MHE NSC

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