PL1085-XXXFP Datasheet, PDF (1/5 Pages) Cystech Electonics Corp. – 3A Low Dropout Positive Voltage Regulator

Spec. No. : C540FP
CYStech Electronics Corp. Issued Date : 2007.07.04
Revised Date :
Page No. : 1/5
3A Low Dropout Positive Voltage Regulator
TO-220FP
PL1085-XXXFP
Features
Dropout Voltage 1.4V at 3A Output Current.
Fast Transient Response.
Extremely Tight Line and Load Regulation.
Built-in Thermal Shutdown Protection.
Adjustable Output Voltage or Fixed 1.5V, 1.8V, 2.5V, 3.3V, 5.0V.
Output Current Limiting.
GOI
Description
The PL1085-XXXFP 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, 3.3V and 5.0V. Dropout voltage is guaranteed to be at
maximum of 1.4V 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
Vin=5V
C1
10100μμF^F
PL1085
ADJ
VREF
R1
125Ω
1%
R2
205Ω
1%
Vout=3.3V
C2
100μF
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.
Adjustable Voltage Regulator
Vin=5V
C1
100μF
PL1085-3.3
GND
Vout=3.3V
C2
100μF
PL1085-XXXFP
Fixed Voltage Regulator
CYStek Product Specification