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LM2575-3.3TA5R 数据表(PDF) 6 Page - First Components International

部件名 LM2575-3.3TA5R
功能描述  1.0A Step - Down Voltage Switching Regulators 1A output current
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制造商  FCI [First Components International]
网页  http://www.cotra.com.tw/
标志 FCI - First Components International

LM2575-3.3TA5R 数据表(HTML) 6 Page - First Components International

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6
TEST CIRCUIT AND LAYOUT GUIDELINES
Careful layout is important with any switching regulator. Rapidly switching currents associated with wiring
inductance generate voltage transients, which can cause problems. To minimize inductance and ground loops,
the lengths of the leads indicated by heavy lines in Figure 1 below should be kept as short as possible. Single-
point grounding (as indicated in Figure 1) or ground plane construction should be used for best results. When
using the Adjustable version, place the programming resistors as close as possible to
sensitive feedback wiring short.
V
IN
Unregulated
DC Input
+V
IN
1
+
C
IN
GND 3
5
2
Output
4
Feedback
L1
D1
MBR360
C
OUT
V
OUT
FIXED OUTPUT
+
ON/OFF
L
O
A
D
Figure 1(a). Fixed Output Voltage Versions
C - 100 µF, 75V, Aluminum Electrolytic
IN
C
- 330 µF, 25V, Aluminum Electrolytic
OUT
D1 - Schottky, MBR360
L1 - 330 µH,
R1 - 2k, 0.1%
R2 - 6.12k, 0.1%
3L Electronic Corp. TC-331M-1.0A- 5026
330 µH
330 µF
100 µF
LM2575, to keep the
LM2575
LM2575 1.0A Step - Down Voltage Switching Regulators


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