LX8587 Ver la hoja de datos (PDF) - Microsemi Corporation
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LX8587 Datasheet PDF : 11 Pages
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LX8587x-xx
®
3A Low Dropout Positive Regulators
TM
PRODUCTION DATA SHEET
TYPICAL APPLICATIONS
IN
VIN
(Note A) +
10µF
ADJ
* C1 improves ripple rejection.
XC should be ≈ R1 at ripple
frequency.
OUT
VOUT
R1
121Ω 1%
150µF
R2
365Ω 1%
C1
+ 10µF*
FIGURE 4 - IMPROVING RIPPLE REJECTION
(Note A)
IN
VIN
C1* +
10µF
ADJ
R2
1k
OUT
VOUT**
R1
121Ω 1%
+
C2
100µF
FIGURE 5 - 1.2V - 8V ADJUSTABLE REGULATOR
* Needed if device is far from filter capacitors.
* *VOUT
= 1.25V⎜⎛1 +
⎝
R2 ⎟⎞
R1 ⎠
VIN
(note A)
+
10µF
TTL
Output
IN
OUT
5V
ADJ
1k
2N3904
1k
121Ω
1%
+
365Ω
1%
100µF
IN
VIN
10µF Tantalum or
100µF Aluminum
ADJ
OUT
3.3V
Min. 15µF Tantalum or
100µF Aluminum capacitor.
May be increased without
limit. ESR must be less
than <400mΩ.
FIGURE 6 - 5V REGULATOR WITH SHUTDOWN
FIGURE 7 - FIXED 3.3V OUTPUT REGULATOR
N o t e A : VIN(MIN) = (Intended VOUT ) + VDROPOUT(MAX)
Copyright © 2000
Rev. 2.0a, 2005-10-25
Microsemi
Integrated Products
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 8
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