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