Microsemi Inc.

Integrated Products Division

11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570

Page 2

Copyright

© 2000

Rev. 2.0b, 2005-10-25

LX8385x-xx

3A Low Dropout Positive Regulators

TM

®

Power Dissipation ................................................................................... Internally Limited

Input Voltage ................................................................................................................ 10V

Input to Output Voltage Differential............................................................................. 10V

Operating Junction Temperature................................................................................150°C

Storage Temperature Range....................................................................... -65°C to 150 °C

Peak Package Solder Reflow Temp (40 seconds max. exposure) .................260°C (+0, -5)

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.

TH ERMAL DATA

DD

Plastic TO-263 3-Pin

THERMAL RESISTANCE

θ

JA

60

°C/W

THERMAL RESISTANCE

θ

JT

2.7°C/W

P

Plastic TO-220 3-Pin

THERMAL RESISTANCE

θ

JA

60

°C/W

THERMAL RESISTANCE

θ

JT

2.7°C/W

DT

Plastic TO-252 3-Pin

THERMAL RESISTANCE

θ

JA

60

°C/W

THERMAL RESISTANCE

θ

JT

2.7°C/W

The

system. All of the above assume no ambient airflow.

PACKAGE PIN OUT

1

V

IN

ADJ /

GND*

V

OUT

2

3

TAB is V

OUT

(Top View)

V

IN

V

OUT

ADJ/

GND*

TAB is V

OUT

3

2

1

(Top View)

TAB is V

OUT

ADJ /

GND*

V

OUT

V

IN

1

2

3

(Top View)

*Pin 1 is GND for fixed voltage versions

RoHS 100% Matte Tin Lead Finish

BLOCK DIAGRAM

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