LX8117 Microsemi Corporation, LX8117 Datasheet

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LX8117

Manufacturer Part Number
LX8117
Description
0.8, 1 & 1.2a Low Dropout Positive Regulators
Manufacturer
Microsemi Corporation
Datasheet

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T
Copyright © 1999
Rev. 1.4
H E
The LX8117/8117A/8117B series are
positive Low Dropout (LDO) regulators.
At the designed maximum load current,
the LX8117 series dropout voltage is guar-
anteed to be 1.2V or lower at 0.8A
(LX8117A 1.3V @ 1A).
voltage decreases with load current.
of the LX8117/17A/17B is available, as
well as versions with fixed outputs of
2.5V, 2.85V, 3.3V and 5V. The 2.85V
version is specifically designed for use
as a component of active termination
networks for the SCSI bus.
trimming of the internal voltage reference
allows specification of the initial output
voltage to within ±1% of its nominal
value. The output current-limit point is
also trimmed, which helps to minimize
stress on both the regulator and the
system power source when they are
operated under short-circuit conditions.
The regulator's internal circuitry will
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
An adjustable output voltage version
3/99
I
N F I N I T E
4.75V to
5.25V
0 to 125
11861 W
T
Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number
A
P
(°C)
O W E R
A
P R O D U C T H I G H L I G H T
CTIVE
10µF
The dropout
ESTERN
IN
LX8117-28
T
(i.e. LX8117-28CSTT). "xx" refers to output voltage, please see table above.
Current
ERMINATOR FOR
On-chip
O F
L
D E S C R I P T I O N
GND
0.8A
1.0A
1.2A
O/P
A
I N
VENUE
I
P A C K A G E O R D E R I N F O R M A T I O N
F
OUT
N N O V A T I O N
I N I T Y
, G
ST
operate at input-to-output differential
voltages down to 1V.
output capacitors with values in the range
of tens to hundreds of microfarads or
more.
requires at least 10µF of output capaci-
tance for stable operation.
equal to as much as 10 percent of their
output as a quiescent current which flows
directly to ground, bypassing the load.
Quiescent current from the LX8117/17A/
17B flows through the load, increasing
power-use efficiency and allowing cooler
operation.
plastic SOT-223 and D-Pak packages for
applications where space is at a premium.
The LX8117 is also available in a plastic
TO-263 package for instances when the
thermal resistance from the circuit die to
the environment must be minimized.
ARDEN
Most regulator circuit designs include
PNP-type regulators can waste current
The LX8117 is available in low-profile
LX8117A-xxCST
LX8117B-xxCST
SCSI-2 B
LX8117-xxCST
Plastic SOT-223
3-pin
22µF
M
G
The LX8117/17A/17B typically
ROVE
I C R O E L E C T R O N I C S
US
, CA. 92841, 714-898-8121, F
LX8117-xx/8117A-xx/8117B-xx
110
110
110
110
0.8, 1 & 1.2A L
DD
LX8117A-xxCDD
LX8117B-xxCDD
LX8117-xxCDD
Plastic T0-263
3-pin
P
18 to 27
Lines
R O D U C T I O N
O W
I
N C
D
DT
LX8117/8117A/8117B-00
LX8117/8117A/8117B-25
LX8117/8117A/8117B-28
LX8117/8117A/8117B-33
LX8117/8117A/8117B-05
A
AX
Part #
R O P O U T
VA I L A B L E
LX8117A-xxCDT
LX8117B-xxCDT
: 714-893-2570
LX8117-xxCDT
.
0.2% Line Regulation Maximum
0.4% Load Regulation Maximum
Output Current Of 800mA
Regulates Down To 1.2V Dropout
(LX8117) And 1.3V Dropout (LX8117A)
Operates Down To 1V Dropout
Space Saving SOT-223 Surface
Mount Package
Guaranteed Dropout Voltage At Multiple
Current Levels
Three-Terminal Adjustable Or Fixed 2.5V,
2.85V, 3.3V & 5V
Battery Chargers
Active SCSI Terminators
5V To 3.3V Linear Regulators
High-Efficiency Linear Regulators
Post Regulators For Switching Supplies
Plastic T0-252
(D-Pak) 3-pin
K E Y F E A T U R E S
A P P L I C A T I O N S
D
P
A T A
O S I T I V E
O
P T I O N S P E R
LIN D
S
H E E T
R
E G U L AT O R S
O C
Adjustable
#: 8117
Voltage
P
Output
2.85V
2.5V
3.3V
A RT
5V
#
1

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