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LM2594HVM-3.3 Datasheet(PDF) 11 Page - National Semiconductor (TI)

[Old version datasheet] Texas Instruments acquired National semiconductor.
No. de pieza LM2594HVM-3.3
Descripción Electrónicos  SIMPLE SWITCHER Power Converter 150 kHz 0.5A Step-Down Voltage Regulator
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Fabricante Electrónico  NSC [National Semiconductor (TI)]
Página de inicio  http://www.national.com
Logo NSC - National Semiconductor (TI)

LM2594HVM-3.3 Datasheet(HTML) 11 Page - National Semiconductor (TI)

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LM2594/LM2594HV Series Buck Regulator Design Procedure (Fixed
Output) (Continued)
LM2594/LM2594HV Series Buck Regulator Design Procedure (Adjustable
Output)
PROCEDURE (Adjustable Output Voltage Version)
EXAMPLE (Adjustable Output Voltage Version)
Given:
V
OUT = Regulated Output Voltage
V
IN(max) = Maximum Input Voltage
I
LOAD(max) = Maximum Load Current
F = Switching Frequency
(Fixed at a nominal 150 kHz).
Given:
V
OUT = 20V
V
IN(max) = 28V
I
LOAD(max) = 0.5A
F = Switching Frequency
(Fixed at a nominal 150 kHz).
Conditions
Inductor
Output Capacitor
Through Hole
Surface Mount
Output
Load
Max Input
Inductance
Inductor
Panasonic
Nichicon
AVX TPS
Sprague
Voltage
Current
Voltage
(µH)
(#)
HFQ Series
PL Series
Series
595D Series
(V)
(A)
(V)
(µF/V)
(µF/V)
(µF/V)
(µF/V)
3.3
0.5
5
33
L14
220/16
220/16
100/16
100/6.3
7
47
L13
120/25
120/25
100/16
100/6.3
10
68
L21
120/25
120/25
100/16
100/6.3
40
100
L20
120/35
120/35
100/16
100/6.3
6
68
L4
120/25
120/25
100/16
100/6.3
0.2
10
150
L10
120/16
120/16
100/16
100/6.3
40
220
L9
120/16
120/16
100/16
100/6.3
5
0.5
8
47
L13
180/16
180/16
100/16
33/25
10
68
L21
180/16
180/16
100/16
33/25
15
100
L20
120/25
120/25
100/16
33/25
40
150
L19
120/25
120/25
100/16
33/25
9
150
L10
82/16
82/16
100/16
33/25
0.2
20
220
L9
120/16
120/16
100/16
33/25
40
330
L8
120/16
120/16
100/16
33/25
12
0.5
15
68
L21
82/25
82/25
100/16
15/25
18
150
L19
82/25
82/25
100/16
15/25
30
220
L27
82/25
82/25
100/16
15/25
40
330
L26
82/25
82/25
100/16
15/25
15
100
L11
82/25
82/25
100/16
15/25
0.2
20
220
L9
82/25
82/25
100/16
15/25
40
330
L17
82/25
82/25
100/16
15/25
FIGURE 2. LM2594/LM2594HV Fixed Voltage Quick Design Component Selection Table
www.national.com
11


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