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AD1117-xx 데이터시트 PDF




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부품번호 AD1117-xx 기능
기능 1A Low Dropout Regulator SCSI-II Acrive Treminator
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AD1117-xx 데이터시트, 핀배열, 회로
www.DataSheet.co.kr
Advanced
AD1117-XX
1A Low Dropout Regulator
SCSI-II Active Terminator
FEATURES
Guaranteed 1A Output
Three Terminal Adjustable Or Fixed 1.5V, 2.5V, 2.85V, 3V, 3.3V & 5V
Very Low Quiescent Current
Low Dropout Voltage Of 1.2 Volts At Full Load
Extremely Tight Load And Line Regulation
Very Low Temperature Coefficient
Fixed 2.85V Device For SCSI-II Active Terminator
Logic-Controlled Electronic Shutdown
• Surface Mount Package SOT-223, TO-252, TO-220, SOT-89, TO-263, & SO-8
APPLICATIONS
• SCSI-II Active Terminator
• Portable/ Palm Top / Notebook Computers
• Battery Chargers
• Disk Drives
• Portable Consumer Equipment
• Portable Instrumentation
• SMPS Post-Regulator
PRODUCT DESCRIPTION
The ADVANCED Semiconductor AD1117 is a low power positive-voltage regulator designed to meet 1A output current and comply
with SCSI-II specifications with a fixed output voltage of 2.85V. This device is an excellent choice for use in battery-powered
applications, as active terminators for the SCSI bus, and portable computers. The AD1117 features very low quiescent current and
very low dropout voltage of 1.2V at a full load and lower as output current decreases. AD1117 is available as an adjustable or fixed
2.85V, 3V, 3.3V, and 5V output voltages.
The AD1117 is offered in a 3-pin surface mount package SOT-223, TO-252, TO-220, SOT-89 & TO-263. The output capacitor of
10mF or larger is needed for output stability of AD1117 as required by most of the other regulator circuits.
Use of ADVANCED Semiconductor’s design, processing and testing techniques make our AD1117 superior over similar products.
ORDERING INFORMATION
TO-220
TO-263
SOT-223
3-PIN
3-PIN
3-PIN
PLASTIC
SOIC 8 PIN
SOT-89
3-PIN
TO-252
DPAK
AD1117U
AD1117T
AD1117M3
AD1117S
AD1117M1
AD1117R
AD1117U-X AD1117T-X AD1117M3-X AD1117S-X AD1117M1-X AD1117R-X
X= Output Voltage (X = 1.5V, 2.5V, 2.85V, 3.0V, 3.3V, 5.0, or Blank for Adjustable)
Oper. Temp.
Range
-40°C to +85°C
-40°C to +85°C
PIN CONNECTIONS
1/9
www.advsemi.com
Ver.0.10
Datasheet pdf - http://www.DataSheet4U.net/




AD1117-xx pdf, 반도체, 판매, 대치품
www.DataSheet.co.kr
Advanced
AD1117-XX
To ensure the stability of the AD1117 an output capacitor ofat
least 10F (tantalum)or 50F (aluminum) is required.The value
may change based on the applicationrequirements on the
output load or temperature range. Thecapacitor equivalent
series resistance (ESR) will effect theAD1117 stability. The
value of ESR can vary from the typeof capacitor used in the
applications. The recommendedvalue for ESR is 0.5. The
output capacitance couldincrease in size to above the
minimum value. The largervalue of output capacitance as
high as 100F can improvethe load transient response.
SOLDERING METHODSThe AD1117 SOT-223 package is
designed to be compatiblewith infrared reflow or vapor-phase
reflow solderingtechniques. During soldering the non-active
or mildlyactive fluxes may be used. The AD1117 die is
attached tothe heatsink lead which exits opposite the input,
output, andground pins.Hand soldering and wave soldering
should be avoided sincethese methods can cause damage to the
device withexcessive thermal gradients on the package. The
SOT-223recommended soldering method are as follows: vapor
phasereflow and infrared reflow with the component preheated
towithin 65C of the soldering temperature range.
THERMAL CHARACTERISTICSThe thermal resistance of
AD1117 is 15C/W from junctionto tab and 31 C/W from tab to
ambient for a total of 46C/W from junction to ambient. The
AD1117 features theinternal thermal limiting to protect the
device duringoverload conditions. Special care needs to be taken
duringcontinuos load conditions the maximum
junctiontemperature does not exceed 125 C.Taking the FR-4
printed circuit board and 1/16 thick with 1ounce copper foil as an
experiment (fig.1 & fig.2), the PCBmaterial is effective at
transmitting heat with the tabattached to the pad area and a
ground plane layer on thebackside of the substrate. Refer to table
1 for the results ofthe experiment.The thermal interaction from
other components in theapplication can effect the thermal
resistance of the AD1117.The actual thermal resistance can be
determined withexperimentation. AD1117 power dissipation is
calculated asfollows:
Maximum Junction Temperature range: TJ = Tambient
(max) + PD* thermal resistance (Junction-to-ambient
Maximum Junction temperature must not exceed the
125°C.
APPLICATION NOTES EXTERNALCAPACITOR
PD = (VIN - VOUT)(IOUT)
4/9
www.advsemi.com
Ver.0.10
Datasheet pdf - http://www.DataSheet4U.net/

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AD1117-xx 전자부품, 판매, 대치품
www.DataSheet.co.kr
Advanced
PACKAGE DRAWING TO-220-3L (U)
AD1117-XX
PACKAGE DRAWING 8-PIN SOIC (S)
7/9
www.advsemi.com
Ver.0.10
Datasheet pdf - http://www.DataSheet4U.net/

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1A Low Dropout Regulator SCSI-II Acrive Treminator

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