REV. 2.1
FS8855-DS-21_EN
SEP 2006
Datasheet
FS8855
500 mA LDO Linear Regulator
FS8855
Fortune Semiconductor Corporation
富晶電子股½有限公司
28F., No.27, Sec. 2, Zhongzheng E. Rd.,
Danshui Town, Taipei County 251, Taiwan
Tel.：886-2-28094742
Fax：886-2-28094874
www.ic-fortune.com
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. 2.1
2/13
FS8855
1.
General Description
4.
Ordering Information
The FS8855 is a low-dropout linear regulator that
operations in the input voltage range from +2.5V to
+9.0V and delivers 500mA output current.
The high-accuracy output voltage is preset at an
internally trimmed voltage 2.5V or 3.3V. Other output
voltages can be mask-optioned from 1.5V to 5.0V
with 100mV increment, except FS8855-29Cx which
has 2.85V output voltage.
The FS8855 consists of a 1.25V bandgap reference,
an error amplifier, and a P-channel pass transistor.
Other features include short-circuit protection and
thermal shutdown protection. The FS8855 devices
are available in TO-92 and SOT-89 packages.
FS8855-xx x x
Package
E：TO-92
K：SOT-89
L：SOT-89
I：SOT-89
Y：SOT-89
1.GND
1.IN
1.GND
1.OUT
1.GND
Pin Out
2.IN
2.GND
2.IN
2.GND
2.OUT
3.OUT
3.OUT
3.OUT
3.IN
3.IN
Temperature Range
C：Commercial Standard
P : Commercial Standard, Lead(Pb) Free and
Phosphorous(P) Free Package
Output Voltage
15 : 1.5V
16 : 1.6V
17 : 1.7V
18 : 1.8V
19 : 1.9V
20 : 2.0V
21 : 2.1V
22 : 2.2V
23 : 2.3V
24 : 2.4V
25 : 2.5V
26 : 2.6V
27 : 2.7V
28 : 2.8V
29 : 2.85V
30 : 3.0V
31 : 3.1V
32 : 3.2V
33 : 3.3V
34 : 3.4V
35 : 3.5V
36 : 3.6V
37 : 3.7V
38 : 3.8V
39 : 3.9V
40 : 4.0V
41 : 4.1V
42 : 4.2V
43 : 4.3V
44 : 4.4V
45 : 4.5V
46 : 4.6V
47 : 4.7V
48 : 4.8V
49 : 4.9V
50 : 5.0V
2.
Features
Low dropout voltage 650mV at 500mA (Typ.)
Up to
±35mV
output voltage accuracy (VIN≤7.0V,
VOUT≤3.5V)
Preset at 2.5V, 3.3V
Mask options from 1.5V to 5.0V
Quiescent current 30µA at 5V input (Typ.)
Small output capacitor
Output current limit
Thermal overload shutdown protection
TO-92 and SOT-89 Package
3.
Applications
Note :
Mask option output types are
available by order only
CD-ROM Drivers
DVD-ROM Drivers
Portable Consumer Equipment
Radio Control Systems
Wireless Communication Systems
Rev. 2.1
3/13
FS8855
SOT-89
5.
Pin Configurations
TO-92
Part No. Pin 1 Pin 2 Pin 3
FS8855
-xxxK
3
IN
GND OUT
IN
OUT
IN
IN
FS8855
xxxxxxxx
1
2
3
Part No. Pin 1 Pin 2 Pin 3
FS8855
GND
-xxxE
IN
OUT
1
2
FS8855
GND
-xxxL
(BOTTOM VIEW)
FS8855
OUT GND
-xxxI
FS8855
GND OUT
-xxxY
6.
Package Marking Information
EX：FS8855-33CL
FS8855
33CLxxxx
xxxx：Date Code
EX：FS8855-33PL
FS8855
33PLxxxx
xxxx：Date Code
7.
Pin Description
Part NO.
FS8855-xxxE
FS8855-xxxK
FS8855-xxxL
FS8855-xxxI
FS8855-xxxY
OUT
Symbol
GND
IN
Description
Ground pin that provides the reference for all voltages.
Regulator input pin. Supply voltage can range from 2.5V to 9.0V.
Bypass with a 1µF capacitor to GND.
Regulator output pin. Sources up to 550mA. Bypass with a 3.3µF
capacitor to GND.
Rev. 2.1
4/13
FS8855
8.
Functional Block Diagram
IN
Current Limit
Shutdown
Logic
Thermal
Protection
OUT
1.25V
Bandgap
Reference
R1
R2
GND
9.
Typical Application Circuit
Rev. 2.1
5/13
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