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KB3406-V1.2 PDF预览

KB3406-V1.2

更新时间： 2024-11-21 00:04:23
品牌 Logo 应用领域
其他 - ETC 电子DVD手机
页数 文件大小 规格书
16页 210K
描述
600mA同步降压IC，代LTC3406、APS1006、RT9216，工作在2.5~5.5V，效率96%，SOT23-5封装，可用于电子词典、数码相框、手机、MP3、MP4、DVD等等需要高效率DC to DC产品。

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KB3406-V1.2 数据手册

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Kingbor Technology Co.,Ltd  
TEL:(86)0755-83095458 FAX:(86)0755-88364052  
KB3406  
1.5MHz, 600mA  
Synchronous Step-Down  
Regulator in  
SOT23-5  
U
FEATURES  
DESCRIPTIO  
■
High Efficiency: Up to 96%  
Very Low Quiescent Current: Only 20  
During Operation  
The KB3406 is a high efficiency monolithic synchro-  
nous buck regulator using a constant frequency, current  
mode architecture. The device is available in an adjustable  
versionandfixedoutputvoltagesof1.5Vand1.8V. Supply  
current during operation is only 20µA and drops to )1µA  
in shutdown. The 2.5V to 5.5V input voltage range makes  
the KB3406 ideally suited for single Li-Ion battery-pow-  
ered applications. 100% duty cycle provides low dropout  
operation, extending battery life in portable systems.  
Automatic Burst Mode operation increases efficiency at  
light loads, further extending battery life.  
■
µA  
■
■
■
■
■
■
■
■
600mA Output Current  
2.5V to 5.5V Input Voltage Range  
1.5MHz Constant Frequency Operation  
No Schottky Diode Required  
Low Dropout Operation: 100% Duty Cycle  
0.6V Reference Allows Low Output Voltages  
Shutdown Mode Draws)1µA Supply Current  
Current Mode Operation for Excellent Line and  
Load Transient Response  
Switching frequency is internally set at 1.5MHz, allowing  
the use of small surface mount inductors and capacitors.  
■
■
Overtemperature Protected  
Low Profile (1mm) SOT23-6 Package  
The internal synchronous switch increases efficiency and  
eliminates the need for an external Schottky diode. Low  
output voltages are easily supported with the 0.6V feed-  
back reference voltage. The KB3406 is available in a low  
profile (1mm) SOT23-5 package.  
U
APPLICATIO S  
■
Cellular Telephones  
■
Personal Information Appliances  
■
Wireless and DSL Modems  
■
Digital Still Cameras  
■
MP3 Players  
■
Portable Instruments  
U
TYPICAL APPLICATIO  
95  
V
= 2.7V  
IN  
90  
85  
80  
75  
70  
65  
60  
2.2µH*  
V
V
IN  
OUT  
4
1
3
5
V
= 3.6V  
IN  
2.7V  
1.8V  
V
SW  
IN  
†
C
C
**  
TO 5.5V  
OUT  
600mA  
IN  
10µF  
V
= 4.2V  
4.7µF  
IN  
KB3406-1.8  
CER  
CER  
RUN  
V
OUT  
GND  
2
V
= 1.8V  
OUT  
*MURATA LQH32CN2R2M33  
**TAIYO YUDEN JMK212BJ475MG  
†TAIYO YUDEN JMK316BJ106ML  
0.1  
1
10  
100  
1000  
OUTPUT CURRENT (mA)  
Figure 1a. High Efficiency Step-Down Converter  
Figure 1b. Efficiency vs Load Current  
1
1234567...16

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