LX8384x-xx
ꢀꢁꢂꢃꢁꢂꢁꢄꢅꢆ
5A Low Dropout Positive Regulators
A
M I C R O S E M I
C O M P A N Y
PRODUCTION
IN
OUT
(Note A)
VIN
VOUT**
Mcrosemi
LX8384x
+
IN
OUT
C1*
10µF
R1
VIN
VOUT
LX8384x
Ω
121 1%
C2
(Note A)
+
100µF
ADJ
+
R1
10µF
Ω
121 1%
ADJ
150µF
R2
1k
.
C1
10µF*
+
R2
Ω
365 1%
* C1 improves ripple rejection.
≈
XC should be R1 at ripple
* Needed if device is far from filter capacitors.
R2
frequency.
=
+
1.25V 1
* *VOUT
FIGURE 4
- IMPROVING RIPPLE REJECTION
R1
FIGURE 5
OUT
- 1.2V - 8V ADJUSTABLE REGULATOR
ꢀ
ꢀ
IN
VIN
5V
LX8384x
(Note A)
+
Ω
121
10µF
1%
ADJ
+
1k
100µF
2N3904
Ω
365
TTL
1%
Output
1k
FIGURE 6
IN
- 5V REGULATOR W ITH SHUTDOW N
OUT
3.3V
VIN
LX8384x
Min. 15µF Tantalum or
10µF Tantalum or
100µF Aluminum
100µF Aluminum capacitor. May
ADJ
be increased without limit. ESR
m ust be less than <400m Ω .
FIGURE 7 - FIXED 3.3V OUTPUT REGULATOR
N o t e A : V
= (Intended VOUT ) + VDROPOUT(MAX)
IN(MIN)
Copyright 2000
Rev. 2.1d, 2001-03-15
Microsemi
Page 8
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
MICROSEMI [ Microsemi ]
