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LM2770SD-1215 PDF预览

LM2770SD-1215

更新时间： 2024-11-12 22:08:15
品牌 Logo 应用领域
美国国家半导体 - NSC 稳压器开关
页数 文件大小 规格书
14页 794K
描述
High Efficiency Switched Capacitor Step-Down DC/DC Regulator with Sleep Mode

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LM2770SD-1215 技术参数

是否Rohs认证： 不符合生命周期：Transferred
包装说明：3 X 3 MM, 0.80 MM HEIGHT, LEAD FREE, PLL-10Reach Compliance Code：not_compliant
ECCN代码：EAR99HTS代码：8542.39.00.01
风险等级：5.2模拟集成电路 - 其他类型：SWITCHED CAPACITOR REGULATOR
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：S-XDSO-N10
JESD-609代码：e0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：0.25 A
标称输出电压：1.5 V封装主体材料：UNSPECIFIED
封装代码：HVSON封装等效代码：SOLCC10,.11,20
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：Other Analog ICs
表面贴装：YES切换器配置：BUCK
最大切换频率：925 kHz温度等级：OTHER
端子面层：Tin/Lead (Sn/Pb)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：40宽度：3 mm
Base Number Matches：1

LM2770SD-1215 数据手册

 浏览型号LM2770SD-1215的Datasheet PDF文件第2页浏览型号LM2770SD-1215的Datasheet PDF文件第3页浏览型号LM2770SD-1215的Datasheet PDF文件第4页浏览型号LM2770SD-1215的Datasheet PDF文件第5页浏览型号LM2770SD-1215的Datasheet PDF文件第6页浏览型号LM2770SD-1215的Datasheet PDF文件第7页 
December 2004  
LM2770  
High Efficiency Switched Capacitor Step-Down DC/DC  
Regulator with Sleep Mode  
General Description  
Features  
n
High Efficiency Multi-Gain Architecture: Peak Power  
The LM2770 is a switched capacitor step-down regulator  
that is ideal for powering low-voltage applications in portable  
systems. The LM2770 can supply load currents up to 250mA  
and operates over an input voltage range of 2.7V to 5.5V.  
This makes the LM2770 a great choice for systems powered  
by 1-cell Li-Ion batteries and chargers. The output voltage of  
the LM2770 can be dynamically switched between two out-  
put levels with a logic input pin. Output voltage pairs cur-  
rently available include 1.2V/1.5V and 1.2V/1.575V. Other  
pairs of voltage options can be developed upon request.  
>
Efficiency 85%  
n Output Voltage Pairs: 1.2V/1.5V and 1.2V/1.575V  
n Dynamic Output Voltage Selection  
n
n
n
3% Output Voltage Accuracy  
Output Currents up to 250mA  
2.7V to 5.5V Input Range  
n Low-Supply-Current Sleep Mode  
n
n
n
n
n
55µA Quiescent Supply Current in Full-Power Mode  
Soft-Start  
Short-Circuit Protection in Full-Power Mode  
Current-Limit Protection in Sleep Mode  
LLP-10 Package (3mm x 3mm x 0.8mm)  
LM2770 efficiency is superior to both fixed-gain switched  
capacitor buck regulators and low-dropout linear regulators  
(LDO’s). Multiple fractional gains maximize power efficiency  
over the entire input voltage and output current ranges. The  
LM2770 can also be switched into a low-power sleep mode  
when load currents are light (≤ 20mA). In sleep mode, the  
charge pump is off, and the output is driven with a low-noise,  
low-power linear regulator.  
Applications  
n DSP Power Supplies  
n Baseband Power Supplies  
n Mobile Phones and Pagers  
n Portable Electronic Equipment  
Soft-start, short-circuit protection, current-limit protection,  
and thermal-shutdown protection are also included. The  
LM2770 is available in National’s small 10-pin Leadless  
Leadframe Package (LLP-10).  
Typical Application Circuit  
LM2770 Efficiency vs.  
Low-Dropout Linear Regulator (LDO) Efficiency  
20126011  
20126001  
© 2004 National Semiconductor Corporation  
DS201260  
www.national.com  
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