
Microsemi 
Linfinity Microelectronics Division 
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570 
Page 2
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
Power Dissipation....................................................................................Internally Limited 
Input Voltage.................................................................................................................10V 
Input to Output Voltage Differential..............................................................................10V 
Operating Junction Temperature 
 Plastic (DT, DD, P Packages)................................................................................150°C 
Storage Temperature Range .......................................................................-65°C to 150 °C 
Lead Temperature (Soldering, 10 Seconds)...............................................................300°C 
Note 1:
Exceeding these ratings could cause damage to the device.  All voltages are with respect to 
Ground.  Currents are positive into, negative out of specified terminal.
DD 
 Plastic TO-263  3-Pin
THERMAL RESISTANCE
-
JUNCTION TO 
A
MBIENT
, 
θ
JA
THERMAL RESISTANCE
-
JUNCTION TO 
T
AB
, 
θ
JT
P 
 Plastic TO-220  3-Pin
THERMAL RESISTANCE
-
JUNCTION TO 
A
MBIENT
, 
θ
JA
THERMAL RESISTANCE
-
JUNCTION TO 
T
AB
, 
θ
JT
DT 
 Plastic TO-252  3-Pin
THERMAL RESISTANCE
-
JUNCTION TO 
A
MBIENT
, 
θ
JA
THERMAL RESISTANCE
-
JUNCTION TO 
T
AB
, 
θ
JT
60
°
C/W 
2.7°C/W 
60
°
C/W 
2.7°C/W 
60
°
C/W 
2.7°C/W 
Junction Temperature Calculation: T
J
 = T
A
 + (P
D
 x 
θ
JT
). 
The 
θ
JA 
&
θ
JT
 numbers are guidelines for the thermal performance of the device/pc-board 
system.  All of the above assume no ambient airflow.   
1
V
IN
ADJ /
GND*
V
OUT
2
3
TAB is V
OUT
DD P
ACKAGE 
(3-
PIN
) 
(Top View) 
V
IN
V
OUT
ADJ/
GND*
TAB is V
OUT
3
2
1
DT P
ACKAGE 
(3-
PIN
) 
(Top View) 
TAB is V
OUT
ADJ /
GND*
V
OUT
V
IN
1
2
3
P
P
ACKAGE 
(3-
PIN
) 
(Top View) 
*
Pin 1 is GND for fixed voltage versions
Thermal
Limit Circuit
Bias Circuit
Bandgap
Circuit
Control
Circuit
Output
Circuit
SOA
Protection
Circuit
Current
Limit Circuit
V
IN
ADJ or
GND*
V
OUT
*
Pin 1 is GND for fixed voltage versions
P
A
C
K
A
G
E
D
A
T
A