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LM2576T-15 Folha de dados(PDF) 8 Page - Tiger Electronic Co.,Ltd

Nome de Peças LM2576T-15
Descrição Electrónicos  regulators are monolithic integrated circuits that provide all the active functions for a step-down switching
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Fabricante Electrônico  TGS [Tiger Electronic Co.,Ltd]
Página de início  http://www.tgselec.com
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LM2576T-15 Folha de dados(HTML) 8 Page - Tiger Electronic Co.,Ltd

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LM2576 Series
Test Circuit and Layout Guidelines
As in any switching regulator, layout is very important. Rapidly switching currents associated with wiring inductance generate voltage
transients which can cause problems. For minimal inductance and ground loops, the length of the leads indicated by heavy lines should
be kept as short as possible.
Single-point grounding (as indicated) or ground plane construction should be used for best results. When using the Adjustable version,
physically locate the programming resistors near the regulator, to keep the sensitive feedback wiring short.
Fixed Output Voltage Versions (Figure 2a)
UNREGULATED
+
+VIN
1
LM2576HV-
FIXED OUTPUT
ON/OFF
FEEDBACK
4
OUTPUT
2
L1
100
H
D1
VOUT
L
O
VIN
DC INPUT
GN
100
F
D 3
5
+
MBR360
COUT
1000
F
A
D
CIN — 100µF, 75V, Aluminum Electrolytic
COUT —1000µF, 25V, Aluminum Electrolytic
D1 — Schottky, MBR360
L1 — 100µH, Pulse Eng. PE-92108
R1 — 2k, 0.1%
R2 — 6.12k, 0.1%
Adjustable Output Voltage Version (Figure 2b)
7V -60V
+VIN
1
100
F
LM2576HV-
ADJ
FEEDBACK
4
OUTPUT
2
L1
100
H
VOUT
5.00V
L
UNREGULATED
DC INPUT
+
CIN
GND 3
ON/OFF
5
+
COUT
R2
O
A
MBR360
1000
F
R1
D
V
OUT
=
V
REF 1
(
+ R
2 )
R
R
R
(
V
OUT
)1
2
1
V
REF
where VREF = 1.23V, R1 between 1k and 5k
REV No:01-060813
8
ELECTRONICS CO.,LTD
TIGER


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