FS8855
500mA LDO Linear Regulator
General Description
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 1.3V to 4.5V
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, SOT-89 and SOT-223 packages.
Ordering Information
FS8855-xx x x
Package
D：TO-92
E：TO-92
F：TO-92
W：TO-92
G：SOT-223
H：SOT-223
J：SOT-223
X：SOT-223
K：SOT-89
L：SOT-89
I：SOT-89
Y：SOT-89
Pin Out
1.IN
1.GND
1.OUT
1.GND
1.IN
1.GND
1.GND
1.OUT
1.IN
1.GND
1.OUT
1.GND
2.GND
2.IN
2.GND
2.OUT
2.GND
2.IN
2.OUT
2.GND
2.GND
2.IN
2.GND
2.OUT
3.OUT
3.OUT
3.IN
3.IN
3.OUT
3.OUT
3.IN
3.IN
3.OUT
3.OUT
3.IN
3.IN
Features
Low dropout voltage 650mV at 500mA (Typ.)
Up to
±35mV
output voltage accuracy (V
IN
≦7V)
Preset at 2.5V, 3.3V
Mask options from 1.3V to 4.5V
Small output capacitor
Output current limit
Thermal overload shutdown protection
TO-92, SOT-89 and SOT-223 Package
Temperature Range
C：Commercial Standard
P : Commercial Standard, Lead(Pb) Free and
Phosphorous(P) Free Package
Output Voltage
13 : 1.3V
14 : 1.4V
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
Applications
CD-ROM Drivers
DVD-ROM Drivers
Portable Consumer Equipment
Radio Control Systems
Wireless Communication Systems
Note :
Mask option output types are
available by order only
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
1/13
TD-0405007
Rev. 1.4
FS8855
500mA LDO Linear Regulator
Pin Configurations
Part No. Pin 1 Pin 2 Pin 3
FS8855
-xxxD
IN
GND OUT
IN
OUT
IN
IN
1
TO-92
Part No. Pin 1 Pin 2 Pin 3
3
SOT-89
2
FS8855
-xxxK
IN
GND OUT
IN
OUT
IN
IN
FS8855
xxxxxxxx
1
2
3
FS8855
GND
-xxxE
(BOTTOM VIEW)
FS8855
OUT GND
-xxxF
FS8855
GND OUT
-xxxW
FS8855
GND
-xxxL
FS8855
OUT GND
-xxxI
FS8855
GND OUT
-xxxY
SOT-223
Part No. Pin 1 Pin 2 Pin 3
FS8855
-xxxG
IN
GND OUT
IN
OUT
IN
IN
1
FS8855
GND
-xxxH
FS8855
xxxxxxxx
2
3
FS8855
GND OUT
-xxxJ
FS8855
OUT GND
-xxxX
Package Marking Information
EX：FS8855-33CL
FS8855
33CLxxxx
xxxx：Date Code
EX：FS8855-33PL
FS8855
33PLxxxx
xxxx：Date Code
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
2/13
TD-0405007
Rev. 1.4
FS8855
500mA LDO Linear Regulator
Pin Description
Part NO.
FS8855-xxCD
FS8855-xxCE
FS8855-xxCF
FS8855-xxCW
FS8855-xxCG
FS8855-xxCH
FS8855-xxCJ
FS8855-xxCX
FS8855-xxCK
FS8855-xxCL
FS8855-xxCI
FS8855-xxCY
Symbol
GND
Ground pin.
Description
IN
Regulator input pin.
OUT
Regulator output pin.
IN
is the regulator input pin. Supply voltage can range from 2.5V to 9.0V. Bypass with a 1µF capacitor to
GND.
OUT
is the output voltage pin. Sources up to 500mA. Bypass with a 3.3µF capacitor to GND.
GND
provides the reference for all voltages.
Functional Block Diagram
IN
Current Limit
Shutdown
Logic
Thermal
Protection
OUT
R1
1.25V
Bandgap
Reference
R2
GND
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
3/13
TD-0405007
Rev. 1.4
FS8855
500mA LDO Linear Regulator
Typical Application Circuit
Absolute Maximum Ratings
Input voltage V
IN
to GND -------------------------------------------------------------------------------------------------- 10V
Output current limit, I
(LIMIT)
-------------------------------------------------------------------------------------------------- 0.8A
Continuous power dissipation, P
D
(∆T= T
J
-T
A
= 100°C)
SOT-223
----------------------------------------------------------------------------------------------------------------------------------------
0.65W
SOT-89
----------------------------------------------------------------------------------------------------------------------------------------
0.55W
----------------------------------------------------------------------------------------------------------------------------------------
0.55W
TO-92
* The power dissipation values are based on the condition that junction temperature T
J
and ambient
temperature T
A
difference is 100°C.
Junction Temperature, T
J
----------------------------------------------------------------------------------------------- +155°C
Storage temperature range, T
STG
---------------------------------------------------------------------- -55℃ to +150°C
Operating junction temperature range ---------------------------------------------------------------- -40℃ to +125°C
Lead temperature (soldering, 10sec) ------------------------------------------------------------------------------- 260°C
* Stresses beyond those listed under “absolute maximum ratings” may cause permanent damage to the device.
These are stress ratings only, and function operation of the device at these or any other conditions beyond those
indicated under “recommended operating conditions” is not implied. Exposure to absolute-maximum-rated
conditions for extended periods may affect device reliability.
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
4/13
TD-0405007
Rev. 1.4
FS8855
500mA LDO Linear Regulator
Electrical Characteristics
(T
A
=25℃, unless otherwise noted.)
Symbol
V
IN
V
OUT
Parameter
Input Voltage
V
IN
=V
OUT
+0.8V, I
OUT
=1mA, V
IN
≦7V
Output Voltage
V
IN
=V
OUT
+0.8V, I
OUT
=1mA, 7V＜V
IN
≦9V
V
IN
>V
OUT
+0.8V, V
IN
≦7V
V
IN
>V
OUT
+0.8V, 7V＜V
IN
≦9V
Test Conditions
Min
2.5
V
OUT
-
0.035
V
OUT
-
0.042
-35
-42
500
0.8
V
OUT
=0V, V
IN
>V
OUT
+0.8V
I
LOAD
=0mA to 500mA, V
IN
=V
OUT
+0.8V
I
OUT
=1mA
V
DROP
∆V
LINE
∆V
LOAD
Dropout Voltage
Line Regulation
Load Regulation
Output Noise
Ripple Rejection
Thermal Shutdown
Temperature
Thermal Shutdown
Hysteresis
Thermal Resistance
I
OUT
=100mA
I
OUT
=500mA
V
OUT
+0.8V<V
IN
<9V, I
LOAD
=1mA
I
OUT
=0mA to 500mA
F=1Hz to 10KHz, C
OUT
=3.3µF
F=10KH
z
, C
OUT
=3.3µF
350
65
1
100
650
0.2
0.01
75
75
155
20
SOT-223
155
180
180
SOT-89
TO-92
400
120
1.2
120
800
0.3
0.02
Typ
V
OUT
V
OUT
Max
9.0
V
OUT
+
0.035
V
OUT
+
0.042
+35
+42
Unit
V
V
V
mV
mV
mA
A
mA
µA
mV
mV
mV
%/V
%/mA
µV
RMS
dB
°C
°C
°C/W
°C/W
°C/W
∆
V
OUT
I
MAX
I
LIMIT
I
SC
I
Q
Output Voltage Accuracy
Maximum Load Current
Current Limit
Short-Circuit Current
Ground Pin Current
e
N
PSRR
T
SD
T
HYS
θ
JA
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL : +886-2-2809-4742
FAX: +886-2-2809-4874
5/13
TD-0405007
Rev. 1.4
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