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PL1085-XXXF3 Fiches technique(PDF) 1 Page - Cystech Electonics Corp.

No de pièce PL1085-XXXF3
Description  3A Low Dropout Positive Voltage Regulator
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Fabricant  CYSTEKEC [Cystech Electonics Corp.]
Site Internet  http://www.cystekec.com
Logo CYSTEKEC - Cystech Electonics Corp.

PL1085-XXXF3 Fiches technique(HTML) 1 Page - Cystech Electonics Corp.

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CYStech Electronics Corp.
Spec. No. : C540F3
Issued Date : 2003.06.25
Revised Date :
Page No. : 1/4
PL1085F3
CYStek Product Specification
3A Low Dropout Positive Voltage Regulator
PL1085-XXXF3
Features
Dropout Voltage 1.3V at 3A Output Current.
Fast Transient Response.
Extremely Tight Line and Load Regulation.
Current Limiting and Thermal Protection.
Adjustable Output Voltage or Fixed 1.5V, 1.8V, 2.5V, 2.85, 3.0V, 3.3V, 3.5V, 5.0V.
Standard 3-Pin Power Packages.
Description
The PL1085-XXXF3 is a low dropout three terminal regulator with 3A output current capability. The output voltage is
adjustable with the use of a resistor divider or fixed 1.5V, 1.8V, 2.5V, 2.85V, 3.0V, 3.3V, 3.5V and 5.0V. Dropout voltage is
guaranteed to be at maximum of 1.3V with the maximum output current. Its low dropout voltage and fast transient response
make it ideal for low voltage microprocessor applications. Current limit and thermal protection provide protection against
any overload condition that would create excessive junction temperatures.
Applications
Mother Board I/O Power Supplies.
Microprocessor Power Supplies.
High Current Regulator.
Post Regulator for Switching Supply.
Typical Application Circuit
TO-263
VREF
Vin=5V
Vout=3.3V
C2
10μF
R1
125Ω
1%
R2
205Ω
1%
C1
10μF
ADJ
Adjustable Voltage Regulator
GND
VREF=VOUT-VADJ=1.25V(typ)
VOUT=VREF(1+R1/R2)+IADJ ×R2
IADJ=55µA(typ.)
(1)C1 needed if device is far
away from filter capacitors.
(2)C2 required for stability.
C2
10μF
C1
10μF
Fixed Voltage Regulator
Vout=3.3V
Vin=5V


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