AIC1117
800mA Low Dropout Positive Adjustable
Regulator
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FEATURES
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DESCRIPTION
The AIC1117 is a low dropout three terminal
regulator with 800mA output current capability.
The output voltage is adjustable with the use
of a resistor divider. For fixed output voltage
versions, the output voltage is internally set at
2.85V, 3.3V or 5V. Dropout is guaranteed at a
maximum of 1.3V at maximum output current.
Its low dropout voltage and fast transient
response
and
make
it
ideal
for
low
voltage
microprocessor applications. Internal current
thermal
limiting
provides
protection
against any overload condition that would
create excessive junction temperatures.
Dropout Voltage 1.2V at 800mA Output Current.
Fast Transient Response.
Line Regulation typically at 0.015%.
Load Regulation typically at 0.1%.
Internal Thermal and Current Limiting.
Adjustable Output Voltage or Fixed 2.85V, 3.3V,
5V.
Standard 3-Pin Power Packages.
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APPLICATIONS
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SCSI-2 Active Terminator.
Post Regulator for Switching Supply.
Battery Chargers.
Constant-Current Regulators.
PC Add-On Card.
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TYPICAL APPLICATION CIRCUIT
V
IN
5V
C1 +
10
µ
F
3
AIC1117
1 ADJ
2
V
REF
V
REF
=V
OUT
- V
ADJ
=1.25V (typ.)
V
OUT
3.3V
RF1
125
Ω
1%
+
C2
10
µ
F
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.
RF2
205
Ω
1%
Adjustable Voltage Regulator
V
IN
5V
C1 +
10
µ
F
3
AIC1117-28
AIC1117-33
AIC1117-50
1
2
V
OUT
+
C2
10
µ
F
GND
Fixed Voltage Regulator
Analog Integrations Corporation
DS-1117-00
Mar 13, 00
4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
TEL: 886-3-5772500
FAX: 886-3-5772510
www.analog.com.tw
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AIC [ ANALOG INTERGRATIONS CORPORATION ]
