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LM3678SDE-1.2 PDF预览

LM3678SDE-1.2

更新时间: 2024-11-15 04:44:23
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
14页 1219K
描述
High-Performance, Miniature 1.5A Step-Down DC-DC Converter for Handheld Applications

LM3678SDE-1.2 技术参数

是否Rohs认证: 符合生命周期:Transferred
包装说明:3 X 3 MM, 0.50 MM PITCH, LLP-10Reach Compliance Code:unknown
ECCN代码:EAR99HTS代码:8542.39.00.01
风险等级:5.22其他特性:ALSO OPERATES WITH 1.2V OUTPUT VOLTAGE
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:2.5 V标称输入电压:3.6 V
JESD-30 代码:S-XDSO-N10JESD-609代码:e3
长度:3 mm湿度敏感等级:1
功能数量:1端子数量:10
最高工作温度:85 °C最低工作温度:-30 °C
最大输出电流:2.4 A标称输出电压:0.8 V
封装主体材料:UNSPECIFIED封装代码:HVSON
封装等效代码:SOLCC10,.12,20封装形状:SQUARE
封装形式:SMALL OUTLINE, HEAT SINK/SLUG, 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
温度等级:OTHER端子面层:Matte Tin (Sn)
端子形式:NO LEAD端子节距:0.5 mm
端子位置:DUAL处于峰值回流温度下的最长时间:NOT SPECIFIED
宽度:3 mmBase Number Matches:1

LM3678SDE-1.2 数据手册

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April 30, 2008  
LM3678 High-Performance, Miniature 1.5A Step-Down DC-  
DC Converter for Handheld Applications  
General Description  
Features  
The LM3678 step-down DC-DC converter is optimized for  
powering low voltage circuits from a single Li-Ion cell battery  
and input voltage rails from 2.5V to 5.5V. It provides up to 1.5A  
load current, over the entire input voltage range. LM3678 of-  
fers a 0.8V/1.2V option. One of the pair of voltages is set  
through the VSELECT pin.  
VOUT = 0.8V/1.2V  
VIN = 2.5V to 5.5V  
1.5A maximum load capability  
3.3MHz PWM fixed switching frequency (typ.) allows the  
use of 1µH inductor  
+/- 3% DC output voltage precision  
LM3678 operates in PWM mode with a fixed frequency of  
3.3MHz. Internal synchronous rectification provides high ef-  
ficiency during PWM mode operation. In shutdown mode, the  
device turns off and reduces battery consumption to 0.01µA  
(typ).  
0.01µA typical shutdown current  
Internal synchronous rectification for high efficiency  
Internal soft start  
Current overload and thermal shutdown protection  
The LM3678 is available in a 3mm x 3mm LLP-10 package.  
A high switching frequency of 3.3MHz (typ.) allows use of tiny  
surface-mount components. Only three external surface-  
mount components, an inductor and two ceramic capacitors,  
are required (solution size less than 33 mm2). For voltages  
other than the voltage shown, please refer to ordering infor-  
mation section or contact National Semiconductor.  
Applications  
PDAs and Smart Phones  
Personal Media Players  
W-LAN  
USB Modem Applications  
Digital still cameras  
Portable Hard disk drives  
Typical Application Circuit  
Efficiency vs. Output Current  
( VOUT = 1.2V)  
20204501  
Note: VSEL H = 1.2V, VSEL L = 0.8V  
20204504  
FIGURE 1.  
© 2008 National Semiconductor Corporation  
202045  
www.national.com  

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