AIC1085_15 Datasheet, PDF (1/9 Pages) Analog Intergrations Corporation – 3A Low Dropout Positive Regulator

AIC1085
3A Low Dropout Positive Regulator
 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 1.8V, 2.5V
and 3.3V.
 Standard 3-Pin Power Packages.
 APPLICATIONS
 Mother Board I/O Power Supplies.
 Microprocessor Power Supplies.
 High Current Regulator.
 Post Regulator for Switching Supply.
 DESCRIPTION
The AIC1085 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 1.8V, 2.5V and 3.3V.
Dropout voltage is guaranteed to be at a 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 limiting and thermal protection provides
protection against any overload condition that
would create excessive junction temperatures.
 TYPICAL APPLICATION CIRCUIT
VIN
3 _AIC1085 2
5V
VOUT
3.3V
C1 ⁺
10F
1 ADJ
VREF ^RF1
125
1%
RF2
205
+
C2
10F
(Note1)
1%
V_REF  V_OUT  V_ADJ  1.25V (typ.)
V_OUT

V_REF
 1 

RF2
RF1



I
ADJ
 RF2
I_ADJ  55A (typ.)
(1) C1 needed if device is far away from
filter capacitors.
(2) C2 required for stability.
Adjustable Voltage Regulator
VIN
3
5V
C1 ⁺
10F
AIC1085-33 ²
1
GND
VOUT
3.3V
+
C2
10F
(Note1)
Fixed Voltage Regulator
Analog Integrations Corporation
Si-Soft Research Center
3A1, 1 Li-Hsin 1^st Rd., Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: [phone]
FAX: [phone] www.analog.com.tw
DS-1085G-02 130802
1