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参数资料
| 型号： | LT1932ES6#TR |
| 厂商： | LINEAR TECHNOLOGY CORP |
| 元件分类： | 稳压器 |
| 英文描述： | 0.78 A SWITCHING REGULATOR, 1600 kHz SWITCHING FREQ-MAX, PDSO6 |
| 封装： | PLASTIC, SOT-23, 6 PIN |
| 文件页数： | 16/16页 |
| 文件大小： | 241K |
| 代理商： | LT1932ES6#TR |
9
LT1932
1932f
APPLICATIO S I FOR ATIO
WU
UU
Figure 10. Recommended Component Placement
Board Layout Considerations
As with all switching regulators, careful attention must be
paid to the PCB board layout and component placement.
To maximize efficiency, switch rise and fall times are made
as short as possible. To prevent radiation and high fre-
quency resonance problems, proper layout of the high
frequency switching path is essential. Minimize the length
and area of all traces connected to the SW pin and always
use a ground plane under the switching regulator to
minimize interplane coupling. The signal path including
the switch, output diode D1 and output capacitor C2,
contains nanosecond rise and fall times and should be
kept as short as possible. In addition, the ground connec-
tion for the RSET resistor should be tied directly to the GND
pin and not be shared with any other component, ensuring
a clean, noise-free connection. Recommended compo-
nent placement is shown in Figure 10.
VIN
SW
D1
SOFT-START
CIRCUIT
1932 F07
L1
6.8
H
VIN
IIN
VOUT
LT1932
SHDN
61
4
RSET
1.50k
C1
4.7
F
C2
1
F
2
3
5
LED
Q1
2N3904
RSET
GND
C3
0.047
F
R1
1.5k
Figure 7. Soft-Start Circuit for the LT1932
VOUT
5V/DIV
IIN
200mA/DIV
100
s/DIV
1932 F08
Figure 8. Input Current at Start-Up Without Soft-Start
VOUT
5V/DIV
IIN
200mA/DIV
100
s/DIV
1932 F09
Figure 9. Input Current at Start-Up with Soft-Start
C1
L1
D1
GND
C2
RSET
1932 F10
1
2
3
6
5
4
DIMMING
CONTROL
SHDN
VIN
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相关代理商/技术参数 |
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