LX8821
TM
廬
D
UAL
C
HANNEL
2.5A L
OW
D
ROPOUT
R
EGULATOR
P
RODUCTION
DATA
S
HEET
DESCRIPTION
KEY FEATURES
Two Independent Regulated
Outputs
Wide DC Supply Voltage of 3.0V to
10.0V
Accurate Output Voltages
Low Tolerance Line (0.5%) and
Load (0.5%) Regulation
Max. Dropout of 0.6V at Rated
Current
Independent Thermal and Current
Limit Protection
Loop Stability Independent of
Output Capacitor
Type SMT Power Package
APPLICATIONS/BENEFITS
ASIC, Memory, I/O
Low Voltage Logic Supplies
Active SCSI Terminators
Battery Charging Circuits
PC Peripherals
Instrumentation
The LX8821 is a positive-voltage
linear regulator with one fixed and
one adjustable output featuring low-
dropout and high accuracy.
To maximize efficiency, the
LX8821 accepts two supply voltage
inputs for the V
CONTROL
and V
POWER
sections. This configuration reduces
power dissipation by operating the
regulator near dropout (V
PWR
-V
OUT
=
VDO = 0.4V @ 2A) while providing
sufficient operating headroom for the
control logic.
Each channel can supply up to
2.5A independently with a regulator
design optimized for system
efficiency by consuming minimal
ground current and directing
quiescent current to the load
The internal voltage reference is
trimmed at wafer level, enabling
precise output voltages, typically
鹵1%
of its specified value.
Power sequencing logic ensures
proper startup regardless of the
level of V
CTRL
or V
PWR
.
The
LX8821 outputs remain off while
V
PWR
< 2.2V.
Thermal and Short Circuit
Current Protection are integrated
on-chip and operate independently
for each regulator output.
The LX8821 regulator is stable
with a wide range of output
capacitance and ESR; typically
10渭F tantalum or ceramic on the
outputs is sufficient.
Microsemi uses a low profile
power package with low thermal
resistance and ease of assembly
using surface mount technology.
WWW .
Microsemi
.C
OM
IMPORTANT: For the most current data, consult Microsemi鈥檚 website: http://www.microsemi.com
PRODUCT HIGHLIGHT
V
POWER
10碌F
V
PWR
Part
V
CONTROL
1碌F
V
OUT1
V
OUT2
R1
33碌F
V
OUT1
V
OUT2
鈳?/div>
R1
鈳?/div>
V
OUT2
=
1.25
鈥?鈳?/div>
1
+
鈳?+
I
ADJ
鈥?/div>
R1
鈳?/div>
R2
鈳?/div>
V
CONTROL
GND
LX8821
ADJ
33碌F
R2
GROUND
LX8821
LX8821
PACKAGE ORDER INFO
T
A
(擄C)
0 to 100
Output V1
1.5V
Output V2
Adjustable
DF
Plastic S-Pak
7-Pin
RoHS Compliant
LX8821CDF
Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part number. (i.e. LX8821CDF-TR)
Copyright
漏
2005
Rev. 1.1, 2005-03-09
Microsemi
Microsemi Microelectronics Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
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英文版
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Low Drop Out Regulator - Dual
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Low Drop Out Regulator - Positive Adjustable
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Dual Channel 1A Low Dropout Regulator
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Dual Channel 1A Low Dropout Regulator
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Dual Channel 1A Low Dropout Regulator
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Dual Channel 1A Low Dropout Regulator
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Dual Channel 1A Low Dropout Regulator
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Dual Channel 1A Low Dropout Regulator
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Dual Channel 1A Low Dropout Regulator
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Dual Channel 1A Low Dropout Regulator
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