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  Microsemi Electronic Components Datasheet  

LX8221 Datasheet

Dual 150mA CMOS Low Dropout Regulator

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LX8221
TM ® Dual 150mA CMOS Low Dropout Rwewgwu.DlaattoaSrheet4U.com
PRODUCTION DATA SHEET
DESCRIPTION
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 < 140µA per
regulator). Further, this ground current
is virtually eliminated in shutdown mode
(typ < 1µA).
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.
IMPORTANT: For the most current data, consult MICRO Semi’s website: http://www.microsemi.com
KEY FEATURES
ƒ Compact regulators with
two 150 mA outputs
ƒ Dropout Voltage typically
175mV @ 100mA
ƒ Ultra low shutdown Current
typically less than 1µA
ƒ Output trimmed to 0.5%
ƒ Small MSOP-10 package
ƒ Over Current &
Temperature protection
ƒ Stable with ceramic or
tantalum capacitors
APPLICATIONS
ƒ Battery Operated Systems
ƒ Laptop, Notebook and PDA’s
ƒ Cellular Telephones/pagers
ƒ Instrumentation
ƒ Linear post regulators for
SMPS
5.0V
3.3V
PRODUCT HIGHLIGHT
N/C
VIN2
EN1
VIN1
EN2
} To Control Logic
On
Off
CB1
VOUT1
ADJ
VOUT2
GND
R1
5.0V
3.3V
N/C
VIN2
EN1
VIN1
EN2
} To Control Logic
On
Off
ADJ1
VOUT1
ADJ2
VOUT2
GND
R1
R2 R1
R2
R2
Fixed / Adjustable Application
Adjustable / Adjustable Application
TJ (°C)
-40 to 125
-40 to 125
-40 to 125
-40 to 125
PACKAGE ORDER INFO
VOUT1
Adjustable
2.5V
2.7V
3.0V
VOUT2
Adjustable
Adjustable
Adjustable
Adjustable
DU
Plastic MSOP 10-Pin
RoHS Compliant / Pb-free
Transition D/C: 0432
LX8221AIDU
LX8221BIDU
LX8221DIDU
LX8221GIDU
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 “T” to the part number. (i.e. LX8221AIDU-TR)
Copyright © 2000
Rev. 1.0a, 2005-03-03
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1


  Microsemi Electronic Components Datasheet  

LX8221 Datasheet

Dual 150mA CMOS Low Dropout Regulator

No Preview Available !

LX8221
TM ® Dual 150mA CMOS Low Dropout Rwewgwu.DlaattoaSrheet4U.com
PRODUCTION DATA SHEET
ABSOLUTE MAXIMUM RATINGS
Input Voltage (VIN1, VIN2) .......................................................................... -0.3V to +7V
Output Current (IOUT1, IOUT2)................................................................................. 150mA
Operating Temperature Range .....................................................................-40 to +125 °C
Maximum Junction Temperature (TJ) ...................................................................... 150 °C
Storage Temperature (TJ) .............................................................................-65 to +150 °C
Peak Package Solder Reflow Temp. (40 second max. exposure)................. 260°C (+0, -5)
Note: Exceeding these ratings could cause damage to the device. All voltages are with respect to
Ground. Currents are positive into, negative out of specified terminal.
THERMAL DATA
DU Plastic MSOP 8-Pin
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
THERMAL RESISTANCE-JUNCTION TO CASE, θJC
206°C/W
39°C/W
Junction Temperature Calculation: TJ = TA + (PD x θJC).
The θJA numbers are guidelines for the thermal performance of the device/pc-board
system. All of the above assume no ambient airflow.
PACKAGE PIN OUT
VOUT1
CB1
NC
EN2
VIN2
1
2
3
4
5
10 VIN1
9 EN1
8 GND
7 ADJ
6 VOUT2
DU PACKAGE
(Top View)
“NC” = No Internal Connection
RoHS / Pb-free 100% Matte Tin Lead Finish
FRONT MARKING
8221
xIDU
LX
x = Voltage Combination
i.e. A = Adj/Adj
PIN NAME
VIN1/VIN2
GND
EN1/EN2
CB1
VOUT1/VOUT2
ADJ (1, 2)
FUNCTIONAL PIN DESCRIPTION
DESCRIPTION
Unregulated input supply voltage
Ground Pin
Enable control input: Logic high = Enable; logic low or open = Shutdown
Reference bypass input. Adding an additional external capacitor reduces output noise.
Regulated output voltage. Regulator stability is achieved with external capacitor of 1uF
Adjust pin. Connect a resistor divider to this pin to establish preferred output voltage.
Copyright © 2000
Rev. 1.0a, 2005-03-03
Microsemi
Linfinity Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 2


Part Number LX8221
Description Dual 150mA CMOS Low Dropout Regulator
Maker Microsemi Corporation
Total Page 9 Pages
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