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LX8554-XX Datasheet(PDF) 7 Page - Microsemi Corporation

Part # LX8554-XX
Description  5A EXTREMELY LOW DROPOUT POSITIVE REGULATORS
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Manufacturer  MICROSEMI [Microsemi Corporation]
Direct Link  http://www.microsemi.com
Logo MICROSEMI - Microsemi Corporation

LX8554-XX Datasheet(HTML) 7 Page - Microsemi Corporation

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5A EXTREMELY LOW DROPOUT POSITIVE REGULATORS
LX8554-xx
PRODUCT DA T ABOOK 1996/1997
7
Copyright © 1997
Rev. 1.1
1/97
P RODUCTION D AT A S HEET
TYPICAL APPLICA TIONS
LX8554
OUT
IN
ADJ
150µF
V
IN
R2
365
W
1%
10µF
R1
121
W
1%
C1
10µF*
* C1 improves ripple rejection.
X
C should be »
R1 at ripple
frequency.
V
OUT
5V
(Note A)
FIGURE 5 — 1.2V - 8V ADJUSTABLE REGULATOR
FIGURE 4 — IMPROVING RIPPLE REJECTION
LX8554
OUT
IN
ADJ
V
OUT**
V
IN
R1
121
W
R2
1k
C1*
10µF
* Needed if device is far from filter capacitors.
** V
OUT = 1.25V
1 +
C2
100µF
R2
R1
(Note A)
FIGURE 6 — 5V REGULATOR WITH SHUTDOWN
(Note A)
LX8554
OUT
IN
ADJ
5V
V
IN
121
W
1%
10µF
100µF
365
W
1%
1k
1k
2N3904
TTL
Output
Note A:
V
IN (MIN) = (Intended VOUT) + (VDROPOUT (MAX))
FIGURE 7 — FIXED 3.3V OUTPUT REGULATOR
3.3V
V
IN
10µF Tantalum
or 100µF Aluminum
Min. 15µF Tantalum or
100µF Aluminum capacitor.
May be increased without
limit. ESR must be less
than 50m
W .
LX8554-33
OUT
IN
GND
Pentium is a registered trademark of Intel Corporation.
Power PC is a trademark of International Business Machines Corporation.


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