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參數資料
| 型號： | FS8856-42PF |
| 廠商： | Electronic Theatre Controls, Inc. |
| 英文描述： | 550mA LDO Linear Regulator |
| 中文描述： | 五百五十毫安LDO線性穩壓器 |
| 文件頁數： | 10/13頁 |
| 文件大小： | 624K |
| 代理商： | FS8856-42PF |
FS8856
550mA LDO Linear Regulator
circuit board with two square inches of copper
allocated for “heat spreading”, the resulting
θ
JA
is
180°C/W
.
Based
on
a
maximum
temperature 125°C
with an ambient of 25°C, the
maximum power dissipation will be:
(
)
(
T
T
P
MAX
=
+
θ
θ
Thermal characteristics were measured using a
double sided board with 1” x 2” square inches of
copper area connected to the GND pin for “heat
Fortune Semiconductor Co.
http://www.fsc.com.tw
TEL
: +886-2-2809-4742
FAX: +886-2-2809-4874
10/13
TD-0405008 Rev. 1.3
operating
junction
)
W
CA
JC
A
J
555
.
180
25
125
=
=
spreading”.
Input-Output Voltage
A regulator’s minimum input-output voltage differential,
or dropout voltage, determines the lowest usable
supply voltage. In battery-powered systems, this will
determine the useful end-of-life battery voltage. The
FS8856 uses a P-channel MOSFET pass transistor,
its dropout voltage is a function of drain-to-source
on-resistance (R
DS(ON)
) multiplied by the load current.
V
DROPOUT
= V
IN
-V
OUT
= R
DS(ON)
x I
OUT
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