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LM2772SDX/NOPB

更新时间： 2024-09-26 01:16:23
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描述
LM2772 Low-Ripple Switched Capacitor Step-Down Regulator

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LM2772  
www.ti.com  
SNVS486B –DECEMBER 2006–REVISED MAY 2013  
LM2772 Low-Ripple Switched Capacitor Step-Down Regulator  
Check for Samples: LM2772  
1
FEATURES  
DESCRIPTION  
The LM2772 is a switched capacitor step-down  
regulator that produces a 1.2V output. It is capable of  
supplying loads up to 150mA with 3% output voltage  
regulation over line, load, and temperature. The  
LM2772 operates with an input voltage from 3.0V to  
5.5V, accommodating 1-cell Li-Ion batteries and  
chargers.  
2
•
•
•
•
•
•
•
•
•
•
•
•
Low-Noise Fixed Frequency Operation  
1.2V Output Voltage  
3% Output Voltage Regulation  
Li-Ion (3.6V) to 1.2V with 80% Efficiency  
Very Low Output Ripple: 8mV @ 150mA  
Output Currents up to 150mA  
The LM2772 utilizes a highly efficient regulated multi-  
gain charge pump. Pre-regulated 1.1MHz fixed-  
frequency switching results in very low ripple and  
noise on both the input and the output. When output  
currents are low, the part automatically switches to a  
low-ripple PFM regulation mode to maintain high  
efficiency over the entire load range.  
2.7V to 5.5V Input Voltage Range  
Shutdown Disconnects Load from VIN  
1.1MHz Switching Frequency  
No Inductors…Small Solution Size  
Short Circuit and Thermal Protection  
WSON-10 Package (3mm × 3mm × 0.8mm)  
The LM2772 is available in TI’s WSON-10 Package  
(WSON-10).  
APPLICATIONS  
•
DSP, Memory, and Microprocessor Power  
Supplies  
•
•
Mobile Phones and Pagers  
Portable Electronic Devices  
Typical Application Circuit  
V
: 1.2V  
OUT  
V
IN  
= 3.0V to 5.5V  
I
up to 150 mA  
OUT  
V
V
OUT  
IN  
C
IN  
C
OUT  
1 µF  
4.7 µF  
C1+  
GND  
C1  
1 µF  
LM2772  
High: ON  
Low: Shutdown  
C1-  
C2+  
EN  
C3+  
C3  
1 µF  
C2  
1 µF  
C3-  
C2-  
Capacitors: 1 µF - TDK C1005X5R0J105K  
4.7 µF - TDK C1608X5R0J475K  
or equivalent  
Figure 1.  
Figure 2. LM2772 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.  
2
All trademarks are the property of their respective owners.  
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 © 2006–2013, Texas Instruments Incorporated  
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LM2772SDX/NOPB 替代型号

型号 品牌 替代类型 描述 数据表
LM2772SD/NOPB TI

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 LM2772 Low-Ripple Switched Capacitor Step-Down Regulator

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