
Microsemi 
Linfinity Microelectronics Division 
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 
Page 4
Copyright 
 2000 
Rev. 2.1d, 2001-03-15 
W
M
.
LX8384x-xx
5A Low Dropout Positive Regulators 
P
RODUCTION
A  M I C R O S E M I  C O M P A N Y
Unless otherwise specified, the following specifications apply over the operating ambient temperature for the LX8384x-xxC with 
0
°
C
≤
  T
A
≤
  125
°
C and the LX8384-xxI with -25
°
C
≤
  T
A
≤
  125
°
C except where otherwise noted.  Test conditions: V
IN 
-V
OUT
 = 3V; 
I
OUT
 = 5A.  Low duty cycle pulse testing techniques are used which maintains junction and case temperatures equal to the ambient 
temperature. 
LX8384x-xx 
Min 
Typ 
Parameter 
Symbol 
Test Conditions 
Max 
Units 
LX8384-15 / 8384A-15 / 8384B-15 (1.5V FIXED)(CONTINUED)
Maximum Output Current 
I
OUT(MAX)
V
IN
 < 7V 
5 
6 
A 
Temperature Stability (Note 3) 
OUT
(T) 
0.25 
% 
Long Term Stability (Note 3) 
RMS Output Noise (% of V
OUT
) 
(Note 3) 
LX8384-33 / 8384A-33 / 8384B-33 (3.3V FIXED)
OUT
 (t) 
T
A
=125°C, 1000 hours 
0.3 
1 
% 
V
OUT (RMS)
T
A
=25°C, 10Hz < f < 10kHz 
0.003 
% 
V
IN
=5V, I
OUT
=0mA, T
A
=25°C 
3.267 
3.30 
3.333 
V 
4.75V < V
IN
 < 10V, 0mA < I
OUT
 < 5A, P < P
MAX
3.235 
3.30 
3.365 
V 
V
IN
=5V, I
OUT
=0mA, T
A
=25°C 
3.274 
3.30 
3.326 
V 
Output Voltage 
(Note 4) 
LX8384/84A-33 
LX8384B-33 
V
OUT
4.75V < V
IN
 < 10V, 0mA < I
OUT
 < 5A, P < P
MAX
3.267 
3.30 
3.333 
V 
4.75V < V
IN
 < 7V 
1 
6 
mV 
Line Regulation (Note 2) 
OUT
(V
IN
) 
4.75V < V
IN
 < 10V 
2 
10 
mV 
Load Regulation (Note 2) 
OUT
(I
OUT
) 
(Pwr) 
V
IN
=5V, 0mA < I
OUT
 < I
OUT(MAX)
5 
15 
mV 
Thermal Regulation 
T
A
=25°C, 20ms pulse 
0.01 
0.02 
% / W 
Ripple Rejection (Note 3) 
C
OUT
=100μF (Tantalum), I
OUT
=5A 
60 
83 
dB 
Quiescent Current 
I
Q
0mA < I
OUT
 < I
OUT(MAX)
, 4.75V < V
IN
 < 10V 
4 
10 
mA 
OUT
=1%, I
OUT
 < I
OUT(MAX)
1.2 
1.5 
V 
Dropout Voltage 
LX8384-33 
LX8384A/84B-33 
OUT
=1%, I
OUT
 < I
OUT(MAX)
1 
1.3 
V 
Maximum Output Current 
I
OUT(MAX)
V
IN
 < 7V 
5 
6 
A 
Temperature Stability (Note 3) 
OUT
 (T)  
0.25 
% 
Long Term Stability (Note 3) 
RMS Output Noise (% of V
OUT
) 
(Note 3) 
OUT
 (t) 
T
A
=125°C, 1000 hours 
0.3 
1 
% 
V
OUT (RMS)
 T
A
=25°C, 10Hz < f < 10kHz 
0.003 
% 
Note 2 
Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle.  Changes in output 
voltage due to heating effects are covered under the specification for thermal regulation. 
These parameters, although guaranteed are not tested in production. 
See Maximum Output Current Section 
Note 3 
Note 4 
E
L
E
C
T
R
I
C
A
L
S