A
M I C R O S E M I
L
INFINITY
C O M P A N Y
LX8610-xx
1A BiCMOS Very Low Dropout Regulators
P
RODUCTION
D
ATASHEET
DESCRIPTION
KEY FEATURES
W W W.
Microsemi
.COM
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 resis-
tance, R
DS(ON)
of 250m鈩?resulting in a
typical 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
SHDN
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
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
APPLICATIONS/BENEFITS
APPLICATIONS/BENEFITS
!
3.3V & 2.5V Supplies For
Memory, Microprocessors,
Clock Circuits, Etc.
!
Portable Equipment
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
LX8610-xx Sim plified Block Diagram
V
IN
Current
Lim it
R
A
Charge
Pum p
V
OUT
Reference
Current
ADJ*
1.25V
+
R
B
SHDN*
V
IN
/2
-
GND
R
A
R
B
-
25K
25K
Reverse
Voltage
Sense
LX8610-00
-
25K
41K
Therm al
Shutdown
LX8610-25
LX8610-33
LX8610-
XX
LX8610-
XX
* Adjustable version in 8 lead package only.
T
J
(擄C)
擄
0 to 125擄C
PACKAGE ORDER INFO
P
LASTIC
SOT-223
O
UTPUT
ST
3-
PIN
V
OLTAGE
3.3
LX8610-33CST
2.5
LX8610-25CST
ADJ (00)
鈥?/div>
DM
Plastic Power SOIC
8-PIN
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
錚?/div>
2000
Rev. 1.0c, 2001-11-16
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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