LX8221
Dual 150mA CMOS Low Dropout Regulator
P
RODUCTION
DESCRIPTION
KEY FEATURES
W W W.
Microsemi
.COM
The LX8221 family of dual output
linear regulators provide for the
selection of either fixed or adjustable
output voltages, and combine low
dropout
operation,
fast
transient
performance, tight output voltage
accuracy, and ultra-low ground current
within a very small package footprint.
The PMOS output transistor allows
for an ultra-low dropout characteristic
(e.g., typically less than 175mV at
100mA). The individual regulators can
be powered from either separate supply
voltages or the same supply voltage
between 2.8V to 6V allowing for
maximum system flexibility.
An optional ceramic or tantalum type
capacitor may be connected to each
Bypass pin separately to improve
performance in critical low-noise
applications.
Overall regulator efficiency has been
improved with a minimized operating
ground current (typ < 140碌A(chǔ) per
regulator). Further, this ground current
is virtually eliminated in shutdown mode
(typ < 1碌A(chǔ)).
Other safety features include channel
independent Thermal and Short Circuit
Current protection.
Separate Enable pins allow each
regulator to be switched on and off
independently by applying a TTL logic
level control signal to the Enable pin
further enhancing system level power
management.
These features combined with a small
footprint (i.e., 10-pin MSOP package)
make the LX8221 especially useful for
battery-operated equipment such as
cellular telephones, laptop computers
and PDA equipment.
!
Compact regulators with
two 150 mA outputs
!
Dropout Voltage typically
175mV @ 100mA
!
Ultra low shutdown Current
typically less than 1碌A(chǔ)
!
Output trimmed to 0.5%
!
Small MSOP-10 package
!
Over Current &
Temperature protection
!
Stable with ceramic or
tantalum capacitors
APPLICATIONS
!
!
!
!
!
Battery Operated Systems
Laptop, Notebook and PDA鈥檚
Cellular Telephones/pagers
Instrumentation
Linear post regulators for
SMPS
IMPORTANT:
For the most current data, consult
MICRO Semi鈥檚
website:
http://www.microsemi.com
PRODUCT HIGHLIGHT
5.0V
VIN2
N/C
EN1
VIN1
3.3V
CB1
EN2
}
To Control Logic
On
Off
5.0V
VIN2
N/C
EN1
VIN1
3.3V
EN2
}
To Control Logic
On
Off
VOUT1
ADJ1
VOUT1
ADJ
GND
VOUT2
R1
ADJ2
GND
VOUT2
R1
R2
R2
R1
R2
Fixed / Adjustable Application
Adjustable / Adjustable Application
PACKAGE ORDER INFO
LX8221
LX8221
T
J
(擄C)
擄
-40 to 125
-40 to 125
-40 to 125
-40 to 125
VOUT1
Adjustable
2.5V
2.7V
3.0V
VOUT2
Adjustable
Adjustable
Adjustable
Adjustable
DU
Plastic MSOP
10-Pin
LX8221-AIDU
LX8221-BIDU
LX8221-DIDU
LX8221-GIDU
Package Marking
8221 AIDU LX
8221 BIDU LX
8221 DIDU LX
8221 GIDU LX
Contact Microsemi for additional / available options
Note: Available in Tape & Reel.
Append the letter 鈥淭鈥?to the part number. (i.e. LX8221-AIDUT)
Copyright
錚?/div>
2000
Rev. 1.0, 2002-01-02
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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