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LM2770SD-1215/NOPB

更新时间： 2024-09-26 11:11:55
品牌 Logo 应用领域
德州仪器 - TI 开关电容器稳压器
页数 文件大小 规格书
20页 1971K
描述
具有休眠模式的高效开关电容器降压直流/直流稳压器 | DSC | 10 | -30 to 105

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LM2770SD-1215/NOPB 数据手册

 浏览型号LM2770SD-1215/NOPB的Datasheet PDF文件第2页浏览型号LM2770SD-1215/NOPB的Datasheet PDF文件第3页浏览型号LM2770SD-1215/NOPB的Datasheet PDF文件第4页浏览型号LM2770SD-1215/NOPB的Datasheet PDF文件第5页浏览型号LM2770SD-1215/NOPB的Datasheet PDF文件第6页浏览型号LM2770SD-1215/NOPB的Datasheet PDF文件第7页 
LM2770  
www.ti.com  
SNVS318E –NOVEMBER 2004–REVISED MAY 2013  
LM2770 High Efficiency Switched Capacitor Step-Down DC/DC Regulator with Sleep Mode  
Check for Samples: LM2770  
1
FEATURES  
APPLICATIONS  
2
•
High Efficiency Multi-Gain Architecture: Peak  
Power Efficiency >85%  
•
•
•
•
DSP Power Supplies  
Baseband Power Supplies  
Mobile Phones and Pagers  
Portable Electronic Equipment  
•
Output Voltage Pairs: 1.2V/1.5V and  
1.2V/1.575V  
•
•
•
•
•
•
Dynamic Output Voltage Selection  
±3% Output Voltage Accuracy  
Output Currents up to 250mA  
2.7V to 5.5V Input Range  
DESCRIPTION  
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 output levels with a logic input pin.  
Output voltage pairs currently available include  
1.2V/1.5V and 1.2V/1.575V. Other pairs of voltage  
options can be developed upon request.  
Low-Supply-Current Sleep Mode  
55µA Quiescent Supply Current in Full-Power  
Mode  
•
•
•
•
Soft-Start  
Short-Circuit Protection in Full-Power Mode  
Current-Limit Protection in Sleep Mode  
WSON-10 Package (3mm × 3mm × 0.8mm)  
Typical Application Circuit  
100%  
V
:1.2V/1.5V  
OUT  
or 1.2V/1.575V  
LM2770  
LM2770  
90%  
Dynamic scaling w/ V  
SEL  
V
IN  
= 2.7V to  
5.5V  
80%  
70%  
60%  
50%  
I
up to 250 mA  
OUT  
V
V
OUT  
IN  
9
6
C
C
IN  
OUT  
10 PF  
10 PF  
40%  
LDO  
C1+  
30%  
20%  
8
H: V  
OUT-H  
L: V  
OUT-L  
V
SEL  
EN  
1
2
C1  
1 PF  
V
= 1.5V  
OUT  
10%  
0%  
H: ON  
L: Shutdown  
7
3
I
= 100 mA  
OUT  
C1-  
C2+  
3.0  
3.5  
4.0  
4.5  
(V)  
5.0  
5.5  
H: Sleep  
L: Full-power  
SLEEP  
GND  
V
IN  
10  
4
C2  
1 PF  
5
C2-  
Capacitors: 1 PF - TDK C1005X5R0J105K  
10 PF - TDK C2012X5R0J106M  
or equivalent  
Figure 1.  
Figure 2. LM2770 Efficiency vs.  
Low-Dropout Linear Regulator (LDO) Efficiency  
1
Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of  
Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet.  
All trademarks are the property of their respective owners.  
2
PRODUCTION DATA information is current as of publication date.  
Products conform to specifications per the terms of the Texas  
Instruments standard warranty. Production processing does not  
necessarily include testing of all parameters.  
Copyright © 2004–2013, Texas Instruments Incorporated  
1234567...20

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LM2770SD-1215/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM2770SD-1215 TI

完全替代

 SWITCHED CAPACITOR REGULATOR, 925kHz SWITCHING FREQ-MAX, DSO10, 3 X 3 MM, 0.80 MM HEIGHT,

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