AIC1117A_15 Datasheet, PDF (1/11 Pages) Analog Intergrations Corporation – 1A Low Dropout Positive Regulator

AIC1117A
1A Low Dropout Positive Regulator
 ^FEATURES
 ^DESCRIPTION
 Dropout Voltage 1.3V at 1A Output Current.
 Fast Transient Response.
 Line Regulation, typical at 0.015%.
 Load Regulation, typical at 0.1%
 Current Limiting and Thermal Protection.
 Adjustable Output Voltage or Fixed at 1.8V, 2.5V
and 3.3V.
 Standard 3-Pin Power Packages.
 ^APPLICATIONS
 Active SCSI Terminators.
 Post Regulators for Switching Supplies.
 Battery Chargers.
 PC Add-On Card.
 ^{TYPICAL APPLICATION CIRCUIT}
The AIC1117A is a low dropout, three terminals
regulator designed to provide output current up
to 1A. The device is available in an adjustable
version and fixed output voltage of 1.8V, 2.5V
and 3.3V. Dropout voltage of maximum of 1.5V
is guaranteed at 1A output current. The quality
of low dropout voltage and fast transient
response make this device ideal for low voltage
microprocessor applications.
The AIC1117A requires output capacitance of a
minimum of 10μF for stability. Built-in output
current limiting and thermal limiting provide
maximal protection to the AIC1117A against
fault conditions.
VIN
5V
C1 ⁺
10F
3 _AIC1117A 2
VOUT
3.3V
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 x (1+RF2/RF1)+ I_ADJ x 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
V_IN
5V
C1 ⁺
10F
3
2
AIC1117A-33
1
GND
V_OUT
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-1117AG-02
20131018
1