LX8820
TM
廬
3.3V/1.0A Ultra Low Dropout Regulator
P
RODUCTION
DATA SHEET
DESCRIPTION
The LX8820 is an ultra low-
dropout single output positive-
voltage linear regulator. The
regulator has a precise, fixed
output capable of delivering 1.2
amps.
The LX8820 output is internally
programmed for 3.3V.
Regulator stability is maintained
with any capacitor ESR, allowing
ceramic, tantalum or electrolytic
types. Capacitance range is
flexible beginning with 2.2碌F to
large values.
The CMOS wafer process
increasing regulator efficiency by
minimizing
operating
ground
current
(typically
<200碌A(chǔ)).
compared to BiPolar technology .
The low RDS
ON
of the PMOS output
stage results in ultra low dropout
(typically 0.45V @ 1A).
Output
voltage
overshoot
is
controlled using slew rate control, as
V
IN
is applied, typically V
OUT
overshoot
< 2% for V
IN
鈮?/div>
1V/碌S ramp. Transient
response to a Step Load is fast and
controlled, V
OUT
overshoot remains
within 2% of nominal for 400mA step
sizes.
Thermal Shutdown, Current Limit
and Short Circuit Current protection
are integrated on-chip for survival
during fault conditions.
Microsemi鈥檚 small 3x3mm body size
(MO-229) package enables maximum
power dissipation with a minimum
surface mount area.
KEY FEATURES
Accurate Output Voltage
Typical Dropout of 0.7V at 1A
and 0.25V at 0.8A
Independent Thermal and
Current Limit Protection
Low Tolerance Load Regulation
(0.4%)
Wide DC Supply Voltage of 4V
to 10V
Loop Stability Independent of
Output Capacitor Type
JEDEC MO-229 surface mount
package / RoHS Compliant
APPLICATIONS/BENEFITS
5V to 3.3V Regulators
Hard Disk Drives, CD-ROMs
ADSL and Cable Modems
Battery Charging Circuits
Instrumentation
PC Peripherals
WWW .
Microsemi
.C
OM
IMPORTANT:
For the most current data, consult
MICROSEMI鈥檚
website:
http://www.microsemi.com
APPLICATION CIRCUITS
1
V
IN
3.8 to 6V
4.7碌F
V
IN
GND
N.C.
V
IN
V
OUT
V
OUT
6
5
2
3
V
OUT
3.3V @ 1A
4
4.7碌F
LX8820
LX8820
LX8820
T
J
(擄C)
0 to 125
PACKAGE ORDER INFO
Plastic MLP 6-
O
UTPUT
V
LM
PIN
RoHS Compliant / Pb-free
Part Marking
882J or 8820
3.3V
LX8820-33CLM
Note: Available in Tape & Reel. Append the letters 鈥淭R鈥?to the part number. (i.e. LX8820-33CLM-TR)
Copyright
漏
2004
Rev. 1.1, 2005-02-24
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
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