P R O D U C T D A T A B O O K 1 9 9 6 / 1 9 9 7
LX8384-xx/8384A-xx/8384B-xx
5 A L O W
D
R O P O U T
P
O S I T I V E
R
E G U L AT O R S
P R O D U C T I O N D A T A S H E E T
TYPICAL APPLICATIONS
LX8384/84A/84B
OUT
LX8384/84A/84B
OUT
VIN
(Note A)
(Note A)
VIN
IN
VOUT**
5V
VOUT
IN
ADJ
R1
121Ω
R1
121Ω
1%
ADJ
10µF
C2
100µF
C1*
10µF
150µF
R2
1k
R2
C1
10µF*
* C1 improves ripple rejection.
XC should be ≈ R1 at ripple
frequency.
365Ω
1%
* Needed if device is far from filter capacitors.
R2
R1
**VOUT = 1.25V 1 +
FIGURE 4 — IMPROVING RIPPLE REJECTION
FIGURE 5 — 1.2V - 8V ADJUSTABLE REGULATOR
LX8384/84A/84B
VIN
(Note A)
OUT
IN
5V
ADJ
121Ω
1%
100µF
10µF
1k
TTL
Output
2N3904
365Ω
1%
1k
FIGURE 6 — 5V REGULATOR WITH SHUTDOWN
LX8384/84A/84B-33
VIN
OUT
IN
3.3V
GND
10µF Tantalum
or 100µF Aluminum
Min. 15µF Tantalum or
100µF Aluminum capacitor.
May be increased without
limit. ESR must be less
than 50mΩ.
FIGURE 7 — FIXED 3.3V OUTPUT REGULATOR
Note A: VIN (MIN) = (Intended VOUT) + (VDROPOUT (MAX)
)
Pentium is a registered trademark of Intel Corporation.
Cyrix is a registered trademark and 6x86 is a trademark of Cyrix Corporation. K5 is a trademark of AMD.
PRODUCTION DATA - Information contained in this document is proprietary to Linfinity, and is current as of publication date. This document
may not be modified in any way without the express written consent of Linfinity. Product processing does not necessarily include testing of
all parameters. Linfinity reserves the right to change the configuration and performance of the product and to discontinue product at any time.
Copyright © 1997
Rev. 1.9 12/97
8
MICROSEMI [ Microsemi ]
