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LTC3406ABES5#TRMPBF PDF预览

LTC3406ABES5#TRMPBF

更新时间: 2024-02-09 01:07:37
品牌 Logo 应用领域
凌特 - Linear 稳压器
页数 文件大小 规格书
16页 308K
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LTC3406ABES5#TRMPBF 数据手册

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LTC3406AB  
1.5MHz, 600mA  
Synchronous Step-Down  
Regulator in ThinSOT  
DESCRIPTION  
The LTC®3406AB is a high efficiency monolithic synchro-  
nous buck regulator using a constant frequency, current  
mode architecture. Supply current with no load is 200μA,  
dropping to <1μA in shutdown. The 2.5V to 5.5V input  
voltage range makes the LTC3406AB ideally suited for  
single Li-Ion battery-powered applications. 100% duty  
cycle provides low dropout operation, extending battery  
run time in portable systems. PWM pulse skipping mode  
operationprovidesverylowoutputripplevoltagefornoise  
sensitive applications. Refer to LTC3406A for applications  
that require Burst Mode® operation.  
FEATURES  
High Efficiency: Up to 96%  
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  
Low Quiescent Current: 200μA  
2% 0.6V Reference  
Shutdown Mode Draws <1μA Supply Current  
Internal Soft-Start Limits Inrush 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.  
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  
feedback reference voltage. The LTC3406AB is available  
in a low profile (1mm) ThinSOT package.  
Overtemperature Protected  
Low Profile (1mm) ThinSOTTM Package  
APPLICATIONS  
Cellular Telephones  
Satellite and GPS Receivers  
Wireless and DSL Modems  
, LT, LTC, LTM and Burst Mode are registered trademarks of Linear Technology  
Corporation. ThinSOT is a trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
Protected by U.S. Patents including 5481178, 6580258.  
Digital Still Cameras  
Media Players  
Portable Instruments  
TYPICAL APPLICATION  
Efficiency vs Load Current  
100  
V
= 1.8V  
OUT  
2.2μH  
90  
80  
70  
60  
50  
40  
30  
20  
10  
1.8V, 600mA  
OUT  
V
IN  
V
SW  
IN  
V
22pF  
4.7μF  
CER  
LTC3406AB  
10μF  
CER  
RUN  
GND  
V
FB  
619k  
309k  
3406AB TA09  
V
V
V
= 2.7V  
= 3.6V  
= 4.2V  
IN  
IN  
IN  
0.1  
1000  
1
10  
100  
OUTPUT CURRENT (mA)  
3406B TA14  
3406abfa  
1

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