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PDF AIC1117-28CM Data sheet ( Hoja de datos )

Número de pieza AIC1117-28CM
Descripción 800mA Low Dropout Positive Adjustable Regulator
Fabricantes Analog Intergrations Corporation 
Logotipo Analog Intergrations Corporation Logotipo



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AIC1117
800mA Low Dropout Positive Adjustable
Regulator
n FEATURES
n DESCRIPTION
l Dropout Voltage 1.2V at 800mA Output Current.
l Fast Transient Response.
l Line Regulation typically at 0.015%.
l Load Regulation typically at 0.1%.
l Internal Thermal and Current Limiting.
l Adjustable Output Voltage or Fixed 2.85V, 3.3V,
5V.
l Standard 3-Pin Power Packages.
n APPLICATIONS
l SCSI-2 Active Terminator.
l Post Regulator for Switching Supply.
l Battery Chargers.
l Constant-Current Regulators.
l PC Add-On Card.
n TYPICAL APPLICATION CIRCUIT
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 make it ideal for low voltage
microprocessor applications. Internal current
and thermal limiting provides protection
against any overload condition that would
create excessive junction temperatures.
VIN 3 AIC1117 2
5V
VOUT
3.3V
C1 +
10µ F
1 ADJ
VREF RF1
125
1% +
C2
RF2
205
10µF
1%
VREF=VOUT - VADJ=1.25V (typ.)
VOUT=VREF x (1+RF2/RF1)+ IADJ x RF2
IADJ=55µA (typ.)
(1) C1 needed if device is far away from filter
capacitors.
(2) C2 required for stability.
Adjustable Voltage Regulator
VIN 3
5V
C1 +
10µF
AIC1117-28
AIC1117-33
AIC1117-50
2
1
GND
VOUT
+
C2
10µF
Fixed Voltage Regulator
Analog Integrations Corporation 4F, 9, Industry E. 9th Rd, Science Based Industrial Park, Hsinchu Taiwan, ROC
DS-1117-00 Mar 13, 00
TEL: 886-3-5772500 FAX: 886-3-5772510
www.analog.com.tw
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1 page




AIC1117-28CM pdf
AIC1117
n BLOCK DIAGRAM
VREF +
1.25V
+
- GM
55µA
Current Amp.
Thermal
Limit
Current
Limit
VIN
For fixed voltage
device
VOUT
ADJ
GND
n PIN DESCRIPTIONS
ADJ PIN -
(GND PIN -
Providing VREF=1.25V (typ.) for adjustable VOUT. VREF=VOUT-VADJ and IADJ=55µA (typ.)
Power ground.)
VOUT PIN - Adjustable output voltage.
VIN PIN - Power Input.
n PHYSICAL DIMENSIONS
l TO-220 (unit: mm)
E
D
L
e1
e
A
F
J1
e2
SYMBOL
A
D
E
e
e1
e2
F
J1
L
MIN
3.56
14.23
9.66
2.29
0.50
-
0.51
2.04
12.70
MAX
4.82
16.51
10.66
2.79
1.15
1.10
1.39
2.92
14.73
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