AIC1117_15 Datasheet, PDF (1/12 Pages) Analog Intergrations Corporation – 800mA Low Dropout Positive Regulator

AIC1117
800mA Low Dropout Positive Regulator
 ^FEATURES
 Dropout Voltage 1.2V at 800mA 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.
 ^DESCRIPTION
The AIC1117 is a low dropout, three terminals
regulator designed to provide output current
up to 800mA. 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 1.4V is guaranteed at 800mA
output current. The quality of low dropout
voltage and fast transient response make this
device ideal for low voltage microprocessor
applications.
The AIC1117 requires output capacitance of a
minimum of 10μF for stability. Built-in output
current limiting and thermal limiting provide
maximal protection to the AIC1117 against
fault conditions.
 ^{TYPICAL APPLICATION CIRCUIT}
VIN
3 _AIC1117 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 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
VIN
3 _AIC1117-33 2
5V
1
C1 ⁺
10F
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-1117G-02 20131018
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