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EN2340QI Datasheet, PDF (14/20 Pages) Enpirion, Inc. – 204A Voltage Mode Synchronous Buck PWM
◁
PVIN
14V
12V
10V
8.0V
6.6V
5V
VOUT
≤1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
5.0V
≤1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
5.0V
≤1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
5.0V
≤1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
5.0V
≤1.0V
1.2V
1.5V
1.8V
2.5V
3.3V
≤1.0V
1.2V
1.5V
1.8V
2.5V
CA (pF)
10
12
15
22
27
39
47
18
22
27
33
47
56
56
33
39
47
56
68
82
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
100
Low VOUT Ripple
CIN = 1 x 22µF/1206
COUT = 2 x 47µF/1206
RA= 180/(Vout0.5) kΩ
RCA
(kΩ)
Nominal
Ripple
(mV)
Nominal
Deviation
(mV)
(Note 6)
30
≤5
≤47
27
6
48
27
5
53
27
6
54
24
8
55
18
11
63
8.2
18
97
22
≤4
≤48
22
5
49
20
5
53
20
6
54
18
7
54
15
10
66
10
16
99
18
≤3
≤45
18
4
46
18
5
54
16
6
56
12
7
57
10
9
68
4.3
14
98
8.2
≤3
≤51
8.2
4
51
8.2
4
54
8.2
5
57
8.2
6
64
8.2
8
70
8.2
10
110
8.2
≤3
≤60
8.2
4
63
8.2
4
65
8.2
5
68
8.2
5
75
8.2
6
85
8.2
≤3
≤73
8.2
3
75
8.2
4
76
8.2
4
80
8.2
4
88
RA (kΩ)
75
43
56
56
51
51
75
27
75
75
75
56
51
75
27
30
30
30
75
56
75
100
100
100
100
91
75
75
100
100
100
100
100
91
100
100
100
100
100
EN2340QI
Smallest Solution Size
CIN = 1 x 22µF/1206
COUT = 2 x 22µF/0805
CA (pF)
RCA
(kΩ)
Nominal
Ripple
(mV)
27
0.1
≤10
39
0.1
13
39
0.1
15
39
0.1
18
39
0.1
26
33
0.1
35
22
5.1
42
47
0.1
≤10
47
0.1
13
47
0.1
15
47
0.1
17
47
0.1
25
39
0.1
32
22
5.1
39
82
0.1
≤9
100
0.1
13
100
0.1
14
100
0.1
17
56
0.1
26
47
0.1
30
33
5.1
33
100
0.1
≤10
100
0.1
12
100
0.1
14
100
0.1
16
82
0.1
23
56
0.1
25
56
5.1
30
100
0.1
≤9
100
0.1
12
100
0.1
14
100
0.1
16
100
0.1
19
82
0.1
22
100
0.1
≤9
100
0.1
11
100
0.1
13
100
0.1
13
100
0.1
14
Nominal
Deviation
(mV)
(Note 6)
≤34
33
38
41
59
63
115
≤35
37
38
44
59
63
128
≤35
39
43
50
70
83
140
≤41
43
46
53
71
85
127
≤46
51
56
61
83
106
≤56
63
70
78
98
Table 5: RA, CA, and RCA Values for Various PVIN/VOUT Combinations: Low VOUT Ripple vs. Smallest Solution Size. See
Figure 6. Use the equations in Figure 6 to calculate RA (for low VOUT ripple option) and RB.
Note 6: Nominal Deviation is for a 2A load transient step.
©Enpirion 2012 all rights reserved, E&OE
06878
Enpirion Confidential
April 16, 2012
www.enpirion.com, Page 14
Rev: B
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