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LD39050 Fiches technique(PDF) 15 Page - STMicroelectronics

No de pièce LD39050
Description  500 mA low quiescent current and low noise voltage regulator
PDF  28 Pages
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Fabricant  STMICROELECTRONICS [STMicroelectronics]
Site Internet  http://www.st.com
Logo STMICROELECTRONICS - STMicroelectronics

LD39050 Fiches technique(HTML) 15 Page - STMicroelectronics

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DocID15470 Rev 3
15/28
LD39050
Typical performance characteristics
28
Figure 29. Load transient (VOUT=2.5 V, IOUT from
0.1 A to 0.5 A)
VEN = VIN = 3.5 V, IOUT from 100 mA to 0.5 A, VOUT = 2.5 V,
CIN = COUT = 1 µF
Figure 30. Line transient
VEN = VIN from 4.3 V to 4.8 V, IOUT = 10 mA, COUT = 1 µF,
CIN = NO
Figure 31. Start-up transient
VEN = VIN = from 0 V to 5.5 V, IOUT=10 mA, CIN = COUT = 1
µF, VOUT = 2.5 V
Figure 32. Enable transient
VEN from 0 V to 2 V, VIN = 3.5 V, VOUT = 2.5 V, IOUT = 10 mA,
CIN = COUT = 1µF
I
OUT
V
OUT
I
OUT
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
IN
V
OUT
V
EN
V
OUT
V
EN
V
OUT
Figure 33. ESR required for stability with
ceramic capacitors (VOUT = 0.8 V)
VIN = VEN = from 1.8 V to 5.5 V, IOUT = from 1 mA to 500
mA, VOUT = 0.8 V, CIN = 1 µF
Figure 34. ESR required for stability with
ceramic capacitors (VOUT = 2.5 V)
VIN = VEN = from 3.5 V to 5.5 V, IOUT = from 1 mA to 500
mA, VOUT = 2.5 V, CIN = 1 µF
0
0.25
0.5
0.75
1
1.25
1.5
1
2
3
4
5
6
7
8
9
1011 12131415 16171819 202122
C
OUT [µF] (nominal value)
UNSTABLE ZONE
STABLE ZONE
0
0.25
0.5
0.75
1
1.25
1.5
1
2
3
4
5
6
7
8
9
1011 12131415 16171819 202122
C
OUT [µF] (nominal value)
UNSTABLE ZONE
STABLE ZONE
0
0.25
0.5
0.75
1
1.25
1.5
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22
C
OUT [µF] (nominal value)
STABLE ZONE
UNSTABLE ZONE
0
0.25
0.5
0.75
1
1.25
1.5
1
2
3
4
5
6
7
8
9
10 11 12 13 14 15 16 17 18 19 20 21 22
C
OUT [µF] (nominal value)
STABLE ZONE
UNSTABLE ZONE



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