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LT1934ES6#PBF

更新时间： 2024-12-01 06:26:59
品牌 Logo 应用领域
凌特 - Linear 开关光电二极管
页数 文件大小 规格书
20页 239K
描述
Switching Regulator, Current-mode, 0.49A, PDSO6

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LT1934ES6#PBF 数据手册

 浏览型号LT1934ES6#PBF的Datasheet PDF文件第2页浏览型号LT1934ES6#PBF的Datasheet PDF文件第3页浏览型号LT1934ES6#PBF的Datasheet PDF文件第4页浏览型号LT1934ES6#PBF的Datasheet PDF文件第5页浏览型号LT1934ES6#PBF的Datasheet PDF文件第6页浏览型号LT1934ES6#PBF的Datasheet PDF文件第7页 
LT1934/LT1934-1  
Micropower Step-Down  
Switching Regulators  
in ThinSOT and DFN  
FEATURES  
DESCRIPTION  
TheLT®1934isamicropowerstep-downDC/DCconverter  
with internal 400mA power switch, packaged in a low  
profile (1mm) ThinSOT. With its wide input range of 3.2V  
to 34V, the LT1934 can regulate a wide variety of power  
sources, from 4-cell alkaline batteries and 5V logic rails  
to unregulated wall transformers and lead-acid batteries.  
Quiescent current is just 12μA and a zero current shut-  
down mode disconnects the load from the input source,  
simplifying power management in battery-powered sys-  
tems. Burst Mode® operation and the low drop internal  
power switch result in high efficiency over a broad range  
of load current.  
n
Wide Input Voltage Range: 3.2V to 34V  
Micropower Operation: I = 12μA  
n
Q
n
n
n
n
n
n
n
5V at 250mA from 6.5V to 34V Input (LT1934)  
5V at 60mA from 6.5V to 34V Input (LT1934-1)  
3.3V at 250mA from 4.5V to 34V Input (LT1934)  
3.3V at 60mA from 4.5V to 34V Input (LT1934-1)  
Low Shutdown Current: <1μA  
Low V  
Switch: 200mV at 300mA  
CESAT  
Low Profile (1mm) SOT-23 (ThinSOT™) and  
(2mm × 3mm × 0.8mm) 6-Pin DFN Package  
APPLICATIONS  
The LT1934 provides up to 300mA of output current. The  
LT1934-1 has a lower current limit, allowing optimum  
choice of external components when the required output  
current is less than 60mA. Fast current limiting protects  
the LT1934 and external components against shorted  
outputs, even at 34V input.  
n
Wall Transformer Regulation  
n
Automotive Battery Regulation  
n
Standby Power for Portable Products  
Distributed Supply Regulation  
Industrial Control Supplies  
n
n
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
Burst Mode is a registered trademark of Linear Technology Corporation.  
ThinSOT is a trademark of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
TYPICAL APPLICATION  
3.3V Step-Down Converter  
Efficiency  
100  
D2  
LT1934  
IN  
V
= 12V  
90  
80  
70  
60  
50  
0.22μF  
BOOST  
L1  
V
= 5V  
47μH  
OUT  
V
OUT  
V
IN  
V
IN  
SW  
3.3V  
4.5V TO 34V  
250mA  
C2  
2.2μF  
V
OUT  
= 3.3V  
D1  
LT1934  
10pF  
1M  
+
C1  
100μF  
ON OFF  
SHDN  
GND  
FB  
604k  
C1: SANYO 4TPB100M  
1934 TA01  
0.1  
1
10  
100  
C2: TAIYO YUDEN GMK325BJ225MN  
D1: ON SEMICONDUCTOR MBR0540  
D2: CENTRAL CMDSH-3  
LOAD CURRENT (mA)  
1934 TA02  
L1: SUMIDA CDRH4D28-470  
1934fe  
1
1234567...20

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LT1934ES6#PBF 替代型号

型号 品牌 替代类型 描述 数据表
LT1934ES6#TRMPBF Linear

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