LX8819 Microsemi Corporation, LX8819 Datasheet - Page 2

• Manufacturer Part Number: LX8819
• Description: Dual Channel 1a Low Dropout Regulator
• Manufacturer: Microsemi Corporation

Copyright © 2003
Revision 1.0a, 4/29/2005
Input Voltage (VIN)......................................................................................13.5V
Load Current (Internally Limited) .....................................................................1A
Power Dissipation ......................................................................Internally Limited
Short-Circuit Protection .......................................................................... Indefinite
Operating Temperature Range ......................................................... 0°C to 150°C
Maximum Operating Junction Temperature ................................................ 150°C
Storage Temperature Range...........................................................-65°C to 150°C
Lead Temperature (Soldering 180 seconds) ................................................ 235°C
RoHS Peak Package Solder Reflow Temperature
(40 second maximum exposure) ..................................................... 260°C (+0, -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
VOUT1
VOUT2
Junction Temperature Calculation: T
The θ
above assume no ambient airflow.
θ
Section: Thermal considerations)
Name
DT
JA
DF
GND
ADJ
VIN
THERMAL RESISTANCE
THERMAL RESISTANCE
THERMAL RESISTANCE
THERMAL RESISTANCE
can vary from 25°C/W to > 40°C/W depending on mounting technique. (See Application Notes
JA
TM
Ground. Currents are positive into, negative out of specified terminal
numbers are guidelines for the thermal performance of the device/pc-board system. All of the
Plastic S-PAK 5-Pin
Plastic D-PAK 5-Pin
Positive unregulated supply input for the regulator – Bypass to GND with at least 2.2µF capacitance having low
ESR for good transient response.
Adjustable regulator feedback input – The output voltage can be set by two external resistors with the following
relationship:
where R
GND.
Common terminal for ground reference
this pin. In addition the tab on the S-Pak package and pin 3 are also used for heat sinking the device.
Adjustable regulator output (Regulator #1) – It is recommended to bypass to GND with at least 2.2µF. Size your
output capacitor to meet the transient loading requirement. If you have a very dynamic load, a lower ESR
capacitor will improve the response to these load steps.
Fixed regulator output (Regulator #2) – It is recommended to bypass to GND with at least 2.2µF. Size your
output capacitor to meet the transient loading requirement. For dynamic loads, a lower ESR capacitor will
improve the response to these load steps.
A B S O L U T E M A X I M U M R A T I N G S
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: [phone]
1
is the resistor connected between VOUT1 and ADJ, and R
-
-
-
-
JUNCTION TO
JUNCTION TO
JUNCTION TO
JUNCTION TO
T H E R M A L D A T A
J
= T
A
+ (P
F U N C T I O N A L P I N D E S C R I P T I O N
D
x θ
C
A
C
A
JA
ASE
MBIENT
ASE
MBIENT
).
, θ
, θ
Integrated Products Division
JC
JC
, θ
, θ
®
Microsemi
JA
JA
VOUT1
– The input and output bypass capacitors should be connected to
.
=
Description
Dual Channel 1A Low Dropout Regulator
V
REF
⋅
⎛
⎜ ⎜
⎝
1
+
30°C/W
32°C/W
5°C/W
6°C/W
R
R
2
1
⎞
⎟ ⎟
⎠
+
I
ADJ
⋅
2
R
is the resistor connected between ADJ and
1
D
ATA
S
HEET
P A C K A G E P I N O U T
RoHS 100% Matte Tin Lead Finish
TAB is GND
DT P
DF P
(Top View)
(Top View)
ACKAGE
ACKAGE
LX8819
VOUT2
VOUT1
GND
ADJ
VIN
Page 2