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LT1054MH PDF预览

LT1054MH

更新时间： 2024-11-13 22:55:47
品牌 Logo 应用领域
凌特 - Linear 转换器调节器开关
页数 文件大小 规格书
16页 337K
描述
Switched-Capacitor Voltage Converter with Regulator

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中文翻译

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LT1054MH 数据手册

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LT1054/LT1054L  
Switched-Capacitor Voltage  
Converter with Regulator  
U
DESCRIPTIO  
EATURE  
Available in Space Saving SO-8 Package  
Output Current: 100mA (LT1054)  
125mA (LT1054L)  
Low Loss: 1.1V at 100mA  
Operating Range:3.5V to 15V (LT1054)  
3.5V to 7V (LT1054L)  
Reference and Error Amplifier for Regulation  
External Shutdown  
S
F
The LT®1054 is a monolithic, bipolar, switched-capacitor  
voltage converter and regulator. The LT1054 provides  
higher output current than previously available converters  
with significantly lower voltage losses. An adaptive switch  
driver scheme optimizes efficiency over a wide range of  
outputcurrents. Total voltagelossat100mAoutputcurrent  
is typically 1.1V. This holds true over the full supply voltage  
range of 3.5V to 15V. Quiescent current is typically 2.5mA.  
■
■
■
■
■
■
■
■
■
External Oscillator Synchronization  
Can Be Paralleled  
The LT1054 also provides regulation, a feature not previ-  
ously available in switched-capacitor voltage converters.  
By adding an external resistive divider a regulated output  
can be obtained. This output will be regulated against  
changes in both input voltage and output current. The  
LT1054 can also be shut down by grounding the feedback  
pin. Supply current in shutdown is less than 100µA.  
Pin Compatible with the LTC®1044/LTC7660  
O U  
PPLICATI  
A
S
■
■
■
■
Voltage Inverter  
Voltage Regulator  
Negative Voltage Doubler  
Positive Voltage Doubler  
The internal oscillator of the LT1054 runs at a nominal  
frequencyof25kHz.Theoscillatorpincanbeusedtoadjust  
the switching frequency or to externally synchronize the  
LT1054.  
The LT1054 is pin compatible with previous converters  
such the LTC1044/LTC7660.  
, LTC and LT are registered trademarks of Linear Technology Corporation.  
W
BLOCK DIAGRAM  
V
REF  
6
V
IN  
LT1054/LT1054L Voltage Loss  
8
2
2.5V  
3.5V ≤ V ≤ 15V (LT1054)  
IN  
REFERENCE  
LT1054L  
3.5V ≤ V ≤ 7V (LT1054L)  
IN  
C
IN  
= C  
= 100µF  
OUT  
R
DRIVE  
CAP  
INDICATES GUARANTEED  
TEST POINT  
+
–
+
–
2
4
+
LT1054  
C
*
IN  
Q
Q
1
FEEDBACK/  
SHUTDOWN  
1
0
OSC  
CAP  
7
T
T
T
= 125°C  
= 25°C  
= –55°C  
R
J
J
J
OSC  
DRIVE  
DRIVE  
DRIVE  
3
5
GND  
*EXTERNAL CAPACITORS  
+
0
25  
50  
75  
100  
125  
C
*
OUT  
OUTPUT CURRENT (mA)  
–V  
OUT  
1054 TA01•  
LT1054 • BD  
1
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