LX8117-00CDT 반도체 회로 부품 판매점
0.8/ 1 & 1.2A LOW DROPOUT POSITIVE REGULATORS
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 Microsemi Corporation |
T H E I N F I N I T E P O W E R O F I N N O VAT I O N
L I N D O C #: 8117
LX8117-xx/8117A-xx/8117B-xx
0.8, 1 & 1.2A L OW DR O P O U T PO S I T I V E RE G U L AT O R S
PR O D U C T I O N D ATA S H E E T
DESCRIPTION
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). The dropout
voltage decreases with load current.
An adjustable output voltage version
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. On-chip
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
operate at input-to-output differential
voltages down to 1V.
Most regulator circuit designs include
output capacitors with values in the range
of tens to hundreds of microfarads or
more. The LX8117/17A/17B typically
requires at least 10µF of output capaci-
tance for stable operation.
PNP-type regulators can waste current
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.
The LX8117 is available in low-profile
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.
NOTE: For current data & package dimensions, visit our web site: http://www.linfinity.com.
PRODUCT HIGHLIGHT
ACTIVE TERMINATOR FOR SCSI-2 BUS
4.75V to
5.25V
LX8117-28
IN OUT
GND
10µF
22µF
110Ω
110Ω
110Ω
18 to 27
Lines
110Ω
KEY FEATURES
s 0.2% Line Regulation Maximum
s 0.4% Load Regulation Maximum
s Output Current Of 800mA
s Regulates Down To 1.2V Dropout
(LX8117) And 1.3V Dropout (LX8117A)
s Operates Down To 1V Dropout
s Space Saving SOT-223 Surface
Mount Package
s Guaranteed Dropout Voltage At Multiple
Current Levels
s Three-Terminal Adjustable Or Fixed 2.5V,
2.85V, 3.3V & 5V
A P P L I C AT I O N S
s Battery Chargers
s Active SCSI Terminators
s 5V To 3.3V Linear Regulators
s High-Efficiency Linear Regulators
s Post Regulators For Switching Supplies
A VA I L A B L E O PTIONS P E R P A RT #
Part #
Output
Voltage
LX8117/8117A/8117B-00 Adjustable
LX8117/8117A/8117B-25 2.5V
LX8117/8117A/8117B-28 2.85V
LX8117/8117A/8117B-33 3.3V
LX8117/8117A/8117B-05
5V
Copyright © 1999
Rev. 1.4 3/99
PACKAGE ORDER INFORMATION
TA (°C)
O/P
Current
ST
Plastic
3-pin
SOT-223
DD
Plastic
3-pin
T0-263
DT
Plastic T0-252
(D-Pak) 3-pin
0.8A
LX8117-xxCST
LX8117-xxCDD
LX8117-xxCDT
0 to 125
1.0A
LX8117A-xxCST
LX8117A-xxCDD
LX8117A-xxCDT
1.2A
LX8117B-xxCST
LX8117B-xxCDD
LX8117B-xxCDT
Note: All surface-mount packages are available in Tape & Reel. Append the letter "T" to part number
(i.e. LX8117-28CSTT). "xx" refers to output voltage, please see table above.
LINFINITY MICROELECTRONICS INC.
11861 WESTERN AVENUE, GARDEN GROVE, CA. 92841, 714-898-8121, FAX: 714-893-2570
1
PRODUCT DATABOOK 1996/1997
LX8117-xx/8117A-xx/8117B-xx
0.8, 1 & 1.2A L OW DR O P O U T PO S I T I V E RE G U L AT O R S
PRODUCTION DATA SHEET
A B S O L U T E M A X I M U M R AT I N G S (Note 1)
Power Dissipation .................................................................................. Internally Limited
Input Voltage
LX8117-00/8117A-00/8117B-00 (Adj.) ..................................................................... 15V
LX8117-33/8117A-33/8117B-33 (3.3V), LX8117-05/8117A-05/8117B-05 (5.0V) .... 15V
LX8117-25/8117A-25/8117B-25 (2.5V), LX8117-28/8117A-28/8117B-28 (2.85V) .. 12V
Surge Voltage ............................................................................................................... 15V
Operating Junction Temperature
Plastic (ST, DD & DT Packages) .......................................................................... 150°C
Storage Temperature Range ...................................................................... -65°C to 150°C
Lead Temperature (Soldering, 10 seconds) ............................................................. 300°C
Short-Circuit Protection ....................................................................................... Indefinite
Note 1. Exceeding these ratings could cause damage to the device. All voltages are with
respect to Ground. Currents are positive into, negative out of the specified terminal.
T H E R MAL DATA
ST PACKAGE:
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
DD PACKAGE:
15°C/W
*150°C/W
THERMAL RESISTANCE-JUNCTION TO TAB, θJT
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
DT PACKAGE:
10°C/W
*60°C/W
THERMAL RESISTANCE-JUNCTION TO TAB, θJC
THERMAL RESISTANCE-JUNCTION TO AMBIENT, θJA
9°C/W
*80°C/W
Junction Temperature Calculation:
T
J
=
T
A
+
(P
D
x
θJA).
The θJA numbers are guidelines for the
thermal performance of the device/pc-board system. All of the above assume no ambient airflow.
* θJAcan be improved with package soldered to 0.5IN2 copper area over backside ground
plane or internal power plane. θJAcan vary from 20ºC/W to > 40ºC/W depending on
mounting technique. (See Application Notes Section: Thermal Considerations)
BLOCK DIAGRAM
VIN
PACKAGE PIN OUTS
TAB IS VOUT
3. IN
2. OUT
1. ADJ / GND
ST PACKAGE
(Top View)
TAB IS VOUT
3
2
1
IN
OUT
ADJ / GND
DD PACKAGE (D2 Pak)
(Top View)
TAB IS VOUT
3. IN
2. OUT
1. ADJ / GND
DT PACKAGE (D-Pak)
(Top View)
Bias
Circuit
Thermal
Limit Circuit
Bandgap
Circuit
Control
Circuit
Output
Circuit
VOUT
ADJ
2
Current
Limit Circuit
Copyright © 1999
Rev. 1.4 3/99
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제조업체: Microsemi Corporation
( microsemi )
LX8117-00CDT regulator
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관련 데이터시트
LX8117-00CDD
0.8/ 1 & 1.2A LOW DROPOUT POSITIVE REGULATORS - Microsemi Corporation
LX8117-00CDT
0.8/ 1 & 1.2A LOW DROPOUT POSITIVE REGULATORS - Microsemi Corporation