A
M I C R O S E M I
C O M P A N Y
LX8630-xx
3A BiCMOS Very Low Dropout Regulators
P
RODUCTION
D
ATA
S
HEET
The LX8630 family are positive very
They are
low dropout regulators.
designed to provide a power supply for
very low headroom applications, such as
3.3V 鈥?2.5V.
BiCMOS technology
allows an
effective series pass element resistance,
R
DS(ON)
of 150m
dropout voltage of 450mV at 3A.
Low Quiescent Current and Logic-
Controlled Shutdown
help conserve
battery life and increase system efficiency.
Typical quiescent current is under 400
A
irrespective of load current, while the
Shut
device will enter shutdown mode when the
SHDN pin is pulled low.
Thermal and Short-Circuit Current
Limiting:
the LX8630 limits the current
when the output is shorted, protecting the
sensitive load circuits. The device will
also turn off if the junction temperature
exceeds 150掳
Available in Popular TO-220 and
TO-263 Power Packages:
adjustable
versions have five leads, and fixed output
voltage devices are supplied in three lead
packages.
Dropout Voltage Typically
W W W .
Microsemi
.
COM
450mV at 3A and 50mV at
10mA
Low Quiescent Current,
Typically Under 400碌A,
irrespective of Load
Shutdown Current 10碌A
Adjustable Output Version in
5-Pin TO-220 & TO-263
Packages
Low Reverse Leakage
Current
Short-Circuit and Thermal
Shutdown Protection
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
3.3V & 2.5V Supplies for
Memory, Microprocessors,
Clock Circuits, Etc.
Portable Equipment
LX8 630-xx S im plified B lock D iagra m
V
IN
C urrent
Lim it
R eference
C urrent
C harge
P um p
R
A
V
O UT
A D J*
1.25V
+
R
B
SHDN*
V
IN
/2
-
GND
R
A
R
B
-
25K
25K
R everse
V oltage
S ense
LX 8630-00
-
25K
41K
T herm al
S hutdown
* Adjustable 5 lead ve rsion only
LX 8630-25
LX 8630-33
LX8630-
XX
LX8630-
XX
Output
Voltage
3.3
0 to 125
2.5
ADJ(00)
T
A
(掳C)
P
Plastic TO-220
3-Pin
LX8630-33CP
LX8630-25CP
-
P
Plastic TO-220
5-Pin
-
-
LX8630-00CP
DD
Plastic TO-263
3-Pin
LX8630-33CDD
LX8630-25CDD
-
DD
Plastic TO-263
5-Pin
-
-
LX8630-00CDD
Note: Available in Tape & Reel.
Append the letter 鈥淭鈥?to the part number. (i.e. LX8630-33CDDT)
Copyright
漏
2000
Rev. 1.0a,2000-11-28
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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