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LM3370SD-4221 PDF预览

LM3370SD-4221

更新时间： 2024-01-24 05:56:38
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
26页 5408K
描述
Dual Synchronous Step-Down DC-DC Converter with Dynamic Voltage Scaling Function

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中文翻译

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LM3370SD-4221 技术参数

是否无铅：不含铅是否Rohs认证：符合
生命周期：Active包装说明：HVSON,
Reach Compliance Code：compliantECCN代码：EAR99
HTS代码：8542.39.00.01Factory Lead Time：1 week
风险等级：1.46Is Samacsys：N
其他特性：ALSO OPERATES IN PFM CONTROL TECHNIQUE, ALSO OPERATES IN ADJUSTABLE MODE FROM 1.8 TO 3.3V模拟集成电路 - 其他类型：DUAL SWITCHING CONTROLLER
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 VJESD-30 代码：R-PDSO-N16
JESD-609代码：e3长度：5 mm
湿度敏感等级：1功能数量：1
端子数量：16最高工作温度：85 °C
最低工作温度：-30 °C最大输出电流：1.4 A
最大输出电压：2 V最小输出电压：1 V
封装主体材料：PLASTIC/EPOXY封装代码：HVSON
封装形状：RECTANGULAR封装形式：SMALL OUTLINE, HEAT SINK/SLUG, VERY THIN PROFILE
峰值回流温度（摄氏度）：260座面最大高度：0.8 mm
表面贴装：YES切换器配置：BUCK
最大切换频率：2400 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：4 mm
Base Number Matches：1

LM3370SD-4221 数据手册

 浏览型号LM3370SD-4221的Datasheet PDF文件第2页浏览型号LM3370SD-4221的Datasheet PDF文件第3页浏览型号LM3370SD-4221的Datasheet PDF文件第4页浏览型号LM3370SD-4221的Datasheet PDF文件第5页浏览型号LM3370SD-4221的Datasheet PDF文件第6页浏览型号LM3370SD-4221的Datasheet PDF文件第7页 
January 4, 2008  
LM3370  
Dual Synchronous Step-Down DC-DC Converter with  
Dynamic Voltage Scaling Function  
General Description  
Features  
The LM3370 is a dual step-down DC-DC converter optimized  
for powering ultra-low voltage circuits from a single Li-Ion bat-  
tery and input rail ranging from 2.7V to 5.5V. It provides two  
outputs with 600 mA load per channel. The output voltage  
range varies from 1V to 3.3V and can be dynamically con-  
trolled using the I2C compatible interface. This dynamic volt-  
age scaling function allows processors to achieve maximum  
performance at the lowest power level. The I2C compatible  
interface can also be used to control auto PFM-PWM/PWM  
mode selection and other performance enhancing features.  
I2C compatible interface  
■
VOUT1 = 1V to 2V in 50 mV steps  
—
—
—
VOUT2 = 1.8V to 3.3V in 100 mV steps  
Automatic PFM/PWM mode switching & Forced PWM  
mode for low noise operation  
Spread Spectrum capability using I2C  
—
600 mA load per channel  
■
■
■
■
■
■
■
2 MHz PWM fixed switching frequency (typ.)  
Internal synchronous rectification for high efficiency  
Internal soft start  
The LM3370 offers superior features and performance for  
portable systems with complex power management require-  
ments. Automatic intelligent switching between PWM low-  
noise and PFM low-current mode offers improved system  
efficiency. Internal synchronous rectification enhances the  
converter efficiency without the use of further external de-  
vices.  
Power-on-reset function for both outputs  
2.7V ≤ VIN ≤ 5.5V  
Operates from a single Li-Ion cell or 3 cell NiMH/NiCd  
batteries and 3.3V/5.5V fixed rails  
2.2 µH Inductor, 4.7 µF Input and 10 µF Output Capacitor  
per channel  
■
There is a power-on-reset function that monitors the level of  
the output voltage to avoid unexpected power losses. The in-  
dependent enable pin for each output allows for simple and  
effective power sequencing.  
16-lead LLP Package (4 mm x 5 mm x 0.8 mm)  
■
■
20-Bump micro SMD Package (3.0 mm x 2.0 mm x 0.6  
mm)  
LM3370 is available in a 4 mm by 5 mm 16-lead non-pullback  
LLP and a 20-Bump micro SMD, 3.0 mm x 2.0 mm x 0.6 mm,  
package. A high switching frequency—2 MHz (typ)—allows  
use of tiny surface-mount components including a 2.2 µH in-  
ductor.  
Applications  
Baseband Processors  
■
■
■
Application Processors (Video, Audio)  
I/O Power  
Default fixed voltages for the 2 output voltages combination  
can be customized to fit system requirements by contacting  
National Semiconductor Corporation.  
FPGA Power and CPLD  
■
Typical Performance Curve  
20167379  
Dimensions: 3.0 mm x 2.0 mm x 0.60 mm  
Efficiency vs. Output Current, VOUT1=2101.627V381  
© 2008 National Semiconductor Corporation  
201673  
www.national.com  
1234567...26

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