LX8221
Dual 150mA CMOS Low Dropout Regulator
PRODUCTION
KEY FEATURES
DESCRIPTION
The LX8221 family of dual output Overall regulator efficiency has been
ꢀ Compact regulators with
two 150 mA outputs
linear regulators provide for the improved with a minimized operating
ꢀ Dropout Voltage typically
selection of either fixed or adjustable
output voltages, and combine low
ground current (typ
< 140µA per
175mV @ 100mA
regulator). Further, this ground current
is virtually eliminated in shutdown mode
(typ < 1µA).
ꢀ Ultra low shutdown Current
typically less than 1µA
ꢀ Output trimmed to 0.5%
ꢀ Small MSOP-10 package
ꢀ Over Current &
Temperature protection
ꢀ Stable with ceramic or
tantalum capacitors
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.
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.
APPLICATIONS
ꢀ Battery Operated Systems
ꢀ Laptop, Notebook and PDA’s
ꢀ Cellular Telephones/pagers
ꢀ Instrumentation
ꢀ Linear post regulators for
SMPS
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.
An optional ceramic or tantalum type
capacitor may be connected to each
Bypass pin separately to improve
performance in critical low-noise
applications.
IMPORTANT: For the most current data, consult MICRO Semi’s website: http://www.microsemi.com
PRODUCT HIGHLIGHT
5.0V
3.3V
5.0V
N/C
To Control Logic
On
N/C
To Control Logic
On
VIN2
VIN1
CB1
ADJ
VIN2
VIN1
ADJ1
ADJ2
EN1
EN2
EN1
EN2
}
}
Off
Off
3.3V
VOUT1
VOUT2
VOUT1
VOUT2
GND
GND
R1
R2
R1
R2
R2
R1
Fixed / Adjustable Application
Adjustable / Adjustable Application
PACKAGE ORDER INFO
Plastic MSOP
10-Pin
VOUT1
VOUT2
Package Marking
TJ (°C)
DU
-40 to 125
-40 to 125
-40 to 125
-40 to 125
Adjustable
2.5V
Adjustable
Adjustable
Adjustable
Adjustable
LX8221-AIDU
LX8221-BIDU
LX8221-DIDU
LX8221-GIDU
8221 AIDU LX
8221 BIDU LX
8221 DIDU LX
8221 GIDU LX
2.7V
3.0V
Contact Microsemi for additional / available options
Note: Available in Tape & Reel.
Append the letter “T” to the part number. (i.e. LX8221-AIDUT)
Copyright 2000
Rev. 1.0, 2002-01-02
Microsemi
Page 1
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570