FS1117
Fortune Semiconductor Corporation
富晶電子股½有限公司
28F., No.27, Sec. 2, Zhongzheng E. Rd.,
Danshui Dist., New Taipei City 251, Taiwan
Tel.：886-2-28094742
Fax：886-2-28094874
www.ic-fortune.com
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This manual contains new product information.
Fortune Semiconductor Corporation
reserves the rights to
modify the product specification without further notice. No liability is assumed by
Fortune Semiconductor
Corporation
as a result of the use of this product. No rights under any patent accompany the sale of the
product.
Rev. 1.3
2/9
FS1117
1.
General Description
4.
Ordering Information
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Output Voltage
12 : 1.2V 18 : 1.8V
25 : 2.5V 33 : 3.3V
50 : 5.0
VR
: Adjustable Output
Note:
The output voltages other than the
preset values are available by order
only.
The FS1117 is a series of low-dropout three-terminal
regulators with a dropout of 1.4V at 1A output
current.
The FS1117 series provides current limiting and
thermal shutdown. Its circuit includes a trimmed
bandgap reference to assure output voltage
accuracy to be within
±
2% for 1.8V, 3.3V and
adjustable versions. Current limit is trimmed to
ensure specified output current and controlled
short-circuit current. On–chip thermal shutdown
provides protection against any combination of
overload and ambient temperature that would create
excessive junction temperature.
The FS1117 has an adjustable version that can
provide the output voltage from 1.25V to 12V with
only two external resistors.
The FS1117 series is available in the industry
standard SOT223 power package.
FS1117-xx x x
Package
Pin Out
J：SOT-223 1.GND 2.OUT 3.IN
Note :
For the adjustable voltage types, the
GND pin is replaced with the ADJ pin
Package Type
G : G stands for Green-Package
2.
Features
1.4V maximum dropout at full load current
Fast transient response
Output current limiting
Built-in thermal shutdown
Good noise rejection
Low ESR Ceramic Capacitor(MlCC) Required gor
Stability
5.
Pin Configurations
Pin 1
Pin 2
Part
No.
Pin 3
IN
SOT-223
FS1117
GND/ADJ
-xxGJ
OUT
(TAP)
FS1117
xxxxxxxx
3.
Applications
PC Motherboard
LCD Monitor
Graphic Card
DVD-video player
NIC/Switch
Telecom Equipment
ADSL Modem
Printer and other Peripheral Equipment
1
2
3
Rev. 1.3
3/9
FS1117
8.
Typical Application Circuit
Vin
+
-
10μF
Vin
FS1117
GND
Vout
+
-
Vout
22
μF
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Vin
Vin
FS1117
ADJ
Vout
Vout
+
-
10μF
R1
+
-
22μF
R2
VOUT=Vref*(1+R2/R1)
Vref=1.25V
9.
Functional Block Diagrams
3
INPUT
+
-
+
-
Thermal
Protrction
+
-
+
-
2
OUTPUT
For Adiustable OUTPUT, disconnect A1 and A2,connent B
For Fixed OUTPUT,connect A1 and A2,disconnect B
A2
A1
1
GND
B
Rev. 1.3
5/9
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