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LM3671MFX-1.8 PDF预览

LM3671MFX-1.8

更新时间: 2024-11-13 22:30:11
品牌 Logo 应用领域
美国国家半导体 - NSC 转换器
页数 文件大小 规格书
16页 964K
描述
2MHz , 600mA Step-Down DC-DC Converter in SOT23-5

LM3671MFX-1.8 技术参数

是否Rohs认证: 不符合生命周期:Transferred
包装说明:2.92 X 2.84 MM, 1.20 MM HEIGHT, SOT-23, 5 PINReach Compliance Code:not_compliant
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.07其他特性:PULSE FREQUENCY MODULATION TECHNIQUE IS ALSO POSSIBLE
模拟集成电路 - 其他类型:SWITCHING REGULATOR控制模式:VOLTAGE-MODE
控制技术:PULSE WIDTH MODULATION最大输入电压:5.5 V
最小输入电压:2.7 V标称输入电压:3.6 V
JESD-30 代码:R-PDSO-G5JESD-609代码:e0
长度:2.92 mm湿度敏感等级:1
功能数量:1端子数量:5
最高工作温度:85 °C最低工作温度:-30 °C
最大输出电流:1.15 A封装主体材料:PLASTIC/EPOXY
封装代码:LSSOP封装等效代码:TSOP5/6,.11,37
封装形状:RECTANGULAR封装形式:SMALL OUTLINE, LOW 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:1.22 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:2600 kHz温度等级:OTHER
端子面层:Tin/Lead (Sn/Pb)端子形式:GULL WING
端子节距:0.953 mm端子位置:DUAL
处于峰值回流温度下的最长时间:40宽度:1.6 mm
Base Number Matches:1

LM3671MFX-1.8 数据手册

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November 2004  
LM3671  
2MHz , 600mA Step-Down DC-DC Converter in SOT23-5  
n 2 MHz PWM fixed switching frequency (typ)  
n Automatic PFM/PWM mode switching  
n Available in fixed output voltages and adjustable version  
n SOT23-5 package  
n Internal synchronous rectification for high efficiency  
n Internal soft start  
n 0.01 µA typical shutdown current  
General Description  
The LM3671 step-down DC-DC converter is optimized for  
powering ultra-low voltage circuits from a single Li-Ion cell or  
3 cell NiMH/NiCd batteries. It provides up to 600mA load  
current, over an input voltage range from 2.8V to 5.5V. There  
are several different fixed voltage output options available as  
well as an adjustable output voltage version.  
n Operates from a single Li-Ion cell or 3 cell NiMH/NiCd  
batteries  
n Only three tiny surface-mount external components  
required (one inductor, two ceramic capacitors)  
n Current overload and Thermal shutdown protection  
The device offers superior features and performance for  
mobile phones and similar portable applications with com-  
plex power management systems. Automatic intelligent  
switching between PWM low-noise and PFM low-current  
mode offers improved system control. During full-power op-  
eration, a fixed-frequency 2 MHz (typ). PWM mode drives  
loads from 70 mA to 600 mA max. Hysteretic PFM mode  
extends the battery life through reduction of the quiescent  
current to 16 µA (typ) at light loads and system standby.  
Internal synchronous rectification provides high efficiency. In  
shutdown mode (Enable pin pulled low) the device turns off  
and reduces battery consumption to 0.01 µA (typ).  
Applications  
n Mobile phones  
n PDAs  
n MP3 players  
n W-LAN  
n Portable instruments  
n Digital still cameras  
n Portable Hard disk drives  
The LM3671 is available in a SOT23-5 package with Pb and  
No Pb (Lead free) versions. A high switching frequency - 2  
MHz (typ) - allows use of tiny surface-mount components.  
Only three external surface-mount components, an inductor  
and two ceramic capacitors, are required.  
Features  
n 16 µA typical quiescent current  
n 600 mA maximum load capability  
Typical Application Circuits  
20108401  
FIGURE 1. Typical Application Circuit  
© 2004 National Semiconductor Corporation  
DS201084  
www.national.com  

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