lm2854mhx-500 National Semiconductor Corporation, lm2854mhx-500 Datasheet - Page 16

• Manufacturer Part Number: lm2854mhx-500
• Description: 4a 500 Khz /1 Mhz Synchronous Simple Switcher Buck Requlator
• Manufacturer: National Semiconductor Corporation

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V
V
IN
IN
5.0
3.3
5.0
3.3
(V)
(V)
L
L
O
O
0.68
0.68
0.68
0.68
0.68
0.68
1.5
1.5
1.5
2.2
2.2
2.2
1.5
1.5
1.5
2.2
2.2
2.2
1.0
1.0
1.0
1.0
1.0
1.0
(µH)
(µH)
Min
Min
100
100
100
100
100
100
100
100
100
100
100
100
40
40
40
40
20
60
20
60
20
60
20
60
TABLE 1. LM2854 500 kHz Compensation Component Values
TABLE 2. LM2854 1 MHz Compensation Component Values
C
C
O
O
(µF)
(µF)
Max
Max
100
200
220
100
200
220
100
200
220
100
200
220
150
220
150
220
150
220
150
220
60
60
60
60
Min
Min
15
15
15
15
15
15
15
15
2
1
2
1
2
1
2
1
2
1
2
1
2
1
2
1
ESR (mΩ)
ESR (mΩ)
16
Max
Max
10
25
10
25
10
25
10
25
10
25
10
25
10
25
10
25
5
5
5
5
5
5
5
5
R
R
FB1
FB1
150
150
150
150
150
120
150
100
100
150
100
100
120
100
100
75
75
75
75
50
50
75
50
33
(kΩ)
(kΩ)
C
C
COMP
COMP
100
120
120
120
150
150
100
220
220
100
100
150
150
150
150
220
330
47
68
68
33
56
56
82
(pF)
(pF)
R
R
COMP
COMP
25
15
15
10
20
15
12
10
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
1
(kΩ)
(kΩ)