A
M I C R O S E M I
C O M P A N Y
LX8610-xx
1A BiCMOS Very Low Dropout Regulators
P
RELIMINARY
D
ATASHEET
The LX8610 family are positive
very low dropout regulators.
They are
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 250m
dropout voltage of 250mV at 1A.
Low Quiescent Current and Logic-
Controlled Shutdown
help conserve
battery life and increase system
efficiency. Typical quiescent current is
under 400碌A(chǔ) irrespective of load
current, while the shutdown current is
only 10碌A(chǔ).
The device will enter
shutdown mode when the ENABLE pin
is pulled low.
Thermal & Short-Circuit Current
Limiting:
the LX8610 limits the current
when the output is shorted, so protecting
sensitive load circuits. The device will
also turn off if the junction temperature
exceeds 155擄C.
Available in small outline SOT-223
and 8-pin SOIC:
Adjustable versions
use the 8-pin SOIC and fixed output
voltage devices are supplied in the 3-lead
SOT-223.
Dropout Voltage Typically
W W W .
Microsemi
.
COM
250mA At 1A And 50mV At
10mA
Low Quiescent Current,
Under 400碌A(chǔ), Irrespective
Of Load
Shutdown Current 10碌A(chǔ)
Adjustable Output Version In
8-pin SOIC Package
Fixed Outputs Of 2.5V, 3.3V
Available In 3-Pin SOT-223
Package
Low Reverse Leakage
Current
Short-Circuit And Thermal
Shutdown Protection
3.3V & 2.5V Supplies For
IMPORTANT:
For the most current data, consult
MICROSEMI
鈥檚 website:
http://www.microsemi.com
Memory, Microprocessors,
Clock Circuits, Etc.
Portable Equipment
L X 86 1 0 -xx S im p lified B lock D ia gram
V
IN
Current
Lim it
Reference
Current
Charge
P um p
R
A
V
OUT
A D J*
1 .2 5 V
R
B
E N A B LE *
GND
V
IN
/2
R
A
R
B
-
25K
25K
Reverse
V oltage
S ense
L X 8 6 1 0-0 0
-
25K
41K
Therm al
S hutdown
* A d ju sta b le 8 le a d ve rsio n on ly
L X 8 6 1 0-2 5
L X 8 6 1 0-3 3
LX8610-
XX
LX8610-
XX
T
J
(擄C)
0 to 125擄C
O
UTPUT
ST
P
LASTIC
SOT-233
DM
Plastic SOIC
8-PIN
V
OLTAGE
3-
PIN
3.3
2.5
ADJ (00)
LX8610-33CST
LX8610-25CST
鈥?/div>
LX8610-33CDM
LX8610-25CDM
LX8610-00CDM
Note: Available in Tape & Reel.
Append the letter 鈥淭鈥?to the part number. (i.e. LX8610CDMT)
Copyright
漏
2000
Rev. 0.6f,2000-09-15
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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