AIC1084_15 Datasheet, PDF (1/9 Pages) Analog Intergrations Corporation – 5A Low Dropout Positive Regulator

AIC1084
5A Low Dropout Positive Regulator
FEATURES
Dropout Voltage 1.5V at 5A 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, 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 AIC1084 is a low dropout three terminal
regulator with 5A output current capability. The
output voltage is adjustable with the use of a
resistor divider or fixed 1.5V, 1.8V, 2.5V and 3.3V.
Dropout voltage is guaranteed to be at maximum
of 1.5V 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.
TYPICAL APPLICATION CIRCUIT
VIN
3 _AIC1084 2
5V
VOUT
3.3V
C1 ⁺
10µF
1 ADJ
VREF ^RF1
125Ω
1%
RF2
205Ω
+
C2
10µF
(Note1)
1%
Adjustable Voltage Regulator
V_REF=V_OUT -V_ADJ=1.25V (typ.)
V_OUT=V_REF x (1+RF2/RF1)+ I_ADJ x RF2
I_ADJ=55µA (typ.)
(1) C1 needed if device is far away from
filter capacitors.
(2) C2 required for stability.
VIN
3
5V
C1 ⁺
10µF
AIC1084-33 ²
1
GND
VOUT
3.3V
+
C2
10µF
(Note1)
Fixed Voltage Regulator
Analog Integrations Corporation
Si-Soft Research Center
3A1, No.1, Li-Hsin Rd. I , Science Park , Hsinchu 300, Taiwan , R.O.C.
TEL: [phone] FAX: [phone]
www.analog.com.tw
DS-1084G-01 073108
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