Electronic Components Datasheet Search
  English  ▼
ALLDATASHEET.COM

X  

FS8855-23PI Datasheet(PDF) 9 Page - List of Unclassifed Manufacturers

Part # FS8855-23PI
Description  500mA LDO Linear Regulator
Download  13 Pages
Scroll/Zoom Zoom In 100%  Zoom Out
Manufacturer  ETC1 [List of Unclassifed Manufacturers]
Direct Link  
Logo ETC1 - List of Unclassifed Manufacturers

FS8855-23PI Datasheet(HTML) 9 Page - List of Unclassifed Manufacturers

Back Button FS8855-23PI Datasheet HTML 5Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 6Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 7Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 8Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 9Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 10Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 11Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 12Page - List of Unclassifed Manufacturers FS8855-23PI Datasheet HTML 13Page - List of Unclassifed Manufacturers  
Zoom Inzoom in Zoom Outzoom out
 9 / 13 page
background image
FS8855
500mA LDO Linear Regulator
Fortune Semiconductor Co.
TEL : +886-2-2809-4742
9/13
TD-0405007
Rev. 1.4
http://www.fsc.com.tw
FAX: +886-2-2809-4874
D
Deettaaiill D
Deessccrriip
pttiioon
n
The FS8855 is a low-dropout linear regulator. The
device provides preset 2.5V and 3.3V output voltages
for output current up to 500mA. Other mask options
for special output voltages from 1.3V to 4.5V with
100mV increment are also available. As illustrated in
function block diagram, it consists of a 1.25V
reference, error amplifier, P-channel pass transistor
and an internal feedback voltage divider.
The 1.25V bandgap reference is connected to the
error amplifier, which compares this reference with
the feedback voltage and amplifies the voltage
difference. If the feedback voltage is lower than the
reference voltage, the pass-transistor gate is pulled
lower, which allows more current to pass to the output
pin and increases the output voltage. If the feedback
voltage is too high, the pass-transistor gate is pulled
up to decrease the output voltage.
The output voltage is feedback through an internal
resistive divider connected to OUT pin. Additional
blocks include an output current limiter, thermal
sensor, and shutdown logic.
Internal P-channel Pass Transistor
The FS8855 features a P-channel MOSFET pass
transistor. Unlike similar designs using PNP pass
transistors, P-channel MOSFETs require no base
drive, which reduces ground pin current. PNP-based
regulators also waste considerable current in dropout
when the pass transistor saturates, and use high
base-drive currents under large loads. The FS8855
does not suffer from these problems and consumes
only 65µA (Typ.) of ground pin current under heavy
loads as well as in dropout conditions.
Output Voltage Selection
The FS8855 output voltage is preset at an
internally trimmed voltage 2.5V, 3.3V or can be
mask-optioned from 1.3V to 4.5V with 100mV
increment. The first two digits of part number suffix
identify
the
output
voltage
(see
Ordering
Information). For example, the FS8855-33CL has
a preset 3.3V output voltage.
Current Limit
The FS8855 also includes a fold back current
limiter. It monitors and controls the pass
transistor’s gate voltage, estimates the output
current, and limits the output current within 0.8A.
Thermal Overload Protection
Thermal overload protection limits total power
dissipation in the FS8855. When the junction
temperature exceeds TJ = +155°C, a thermal
sensor turns off the pass transistor, allowing the IC
to cool down. The thermal sensor turns the pass
transistor on again after the junction temperature
cools down by 20°C, resulting in a pulsed output
during continuous thermal overload conditions.
Thermal overload protection is designed to protect
the FS8855 in the event of fault conditions. For
continuous operation, the maximum operating
junction temperature rating of TJ = +125°C should
not be exceeded.
Operating Region and Power Dissipation
Maximum power dissipation of the FS8855
depends on the thermal resistance of the case and
circuit board, the temperature difference between
the die junction and ambient air, and the rate of
airflow. The power dissipation across the devices
is P = IOUT x (VIN-VOUT). The resulting maximum
power dissipation is:
(
) ()
JA
A
J
CA
JC
A
J
MAX
T
T
T
T
P
θ
θ
θ
=
+
=
Where (TJ-TA) is the temperature difference
between the FS8855 die junction and the
surrounding air, θJC is the thermal resistance of the
package chosen, and θCA is the thermal resistance
through the printed circuit board, copper traces
and other materials to the surrounding air. For
better heat-sinking, the copper area should be
equally shared between the IN, OUT, and GND
pins.
If the FS8855 uses a SOT-89 package and this
package is mounted on a double sided printed
circuit board with two square inches of copper
allocated for “heat spreading”, the resulting θJA is


Similar Part No. - FS8855-23PI

ManufacturerPart #DatasheetDescription
logo
Fortune Semiconductor C...
FS8855-25GI FORTUNE-FS8855-25GI Datasheet
824Kb / 14P
   500 mA LDO Linear Regulator
FS8855-25GL FORTUNE-FS8855-25GL Datasheet
824Kb / 14P
   500 mA LDO Linear Regulator
FS8855-28GI FORTUNE-FS8855-28GI Datasheet
824Kb / 14P
   500 mA LDO Linear Regulator
FS8855-28GL FORTUNE-FS8855-28GL Datasheet
824Kb / 14P
   500 mA LDO Linear Regulator
More results

Similar Description - FS8855-23PI

ManufacturerPart #DatasheetDescription
logo
ACE Technology Co., LTD...
ACE511 ACE-ACE511 Datasheet
345Kb / 8P
   500mA LDO Linear Voltage Regulator
VER 1.2
logo
E-CMOS Corporation
EC49124 E-CMOS-EC49124 Datasheet
311Kb / 6P
   500mA Super LDO Linear Regulator
logo
Seaward Electronics Inc...
SE5119 SEAWARD-SE5119 Datasheet
192Kb / 6P
   500mA CMOS LDO Linear Regulator
logo
Maxim Integrated Produc...
MAX25300A MAXIM-MAX25300A Datasheet
468Kb / 16P
   12μVRMS Low Noise 500mA LDO Linear Regulator
Rev 0; 6/20
MAX38902C MAXIM-MAX38902C Datasheet
451Kb / 13P
   12μVRMS Low Noise 500mA LDO Linear Regulator
Rev 0; 11/17
MAX38902B MAXIM-MAX38902B Datasheet
451Kb / 13P
   12μVRMS Low Noise 500mA LDO Linear Regulator
Rev 0; 11/17
MAX38902D MAXIM-MAX38902D Datasheet
451Kb / 13P
   12μVRMS Low Noise 500mA LDO Linear Regulator
Rev 0; 11/17
logo
SHENZHEN FUMAN ELECTRON...
FM6211 FUMAN-FM6211 Datasheet
256Kb / 9P
   500mA LDO Regulator
logo
Monolithic Power System...
EV2005DD-01B MPS-EV2005DD-01B Datasheet
443Kb / 4P
   500mA Low-Current LDO Linear Regulator EV Board
EV8904DD-00A MPS-EV8904DD-00A Datasheet
226Kb / 4P
   500mA Low-Current LDO Linear Regulator EV Board
More results


Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13


Datasheet Download

Go To PDF Page


Link URL




Privacy Policy
ALLDATASHEET.COM
Does ALLDATASHEET help your business so far?  [ DONATE ] 

About Alldatasheet   |   Advertisement   |   Datasheet Upload   |   Contact us   |   Privacy Policy   |   Link Exchange   |   Manufacturer List
All Rights Reserved©Alldatasheet.com


Mirror Sites
English : Alldatasheet.com  |   English : Alldatasheet.net  |   Chinese : Alldatasheetcn.com  |   German : Alldatasheetde.com  |   Japanese : Alldatasheet.jp
Russian : Alldatasheetru.com  |   Korean : Alldatasheet.co.kr  |   Spanish : Alldatasheet.es  |   French : Alldatasheet.fr  |   Italian : Alldatasheetit.com
Portuguese : Alldatasheetpt.com  |   Polish : Alldatasheet.pl  |   Vietnamese : Alldatasheet.vn
Indian : Alldatasheet.in  |   Mexican : Alldatasheet.com.mx  |   British : Alldatasheet.co.uk  |   New Zealand : Alldatasheet.co.nz
Family Site : ic2ic.com  |   icmetro.com