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參數資料
| 型號： | FAN4855MU |
| 廠商： | FAIRCHILD SEMICONDUCTOR CORP |
| 元件分類： | 穩壓器 |
| 英文描述： | 500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect |
| 中文描述： | 0.5 A SWITCHING REGULATOR, PDSO8 |
| 封裝： | MSOP-8 |
| 文件頁數： | 2/13頁 |
| 文件大小： | 148K |
| 代理商： | FAN4855MU |
PRODUCT SPECIFICATION
FAN4855
2
REV. 1.0.0 3/17/04
Pin Configuration
Pin Description
Absolute Maximum Ratings
Absolute Maximum Ratings are those values, beyond which the device could be permanently damaged. Absolute maximum
ratings are stress ratings only and functional device operation is not implied.
PIN
1
NAME
V
FUNCTION
IN
Battery Input Voltage
power from V
Shut Down
Low-Battery Input
Low-Battery Output
voltage falls below its targeted value. The open-drain output can be used to reset a
microcontroller.
Feedback Input
. For setting the output voltage. Connect this pin to the resistor divider.
Boost regulator output
. Output voltage can be set to be in the 3 to 5V range. Startup at
moderate load is achievable at input voltages around 1.35V.
Boost inductor connection
. Connect an inductor between this pin and V
output supply, this pin pulls low, charging the inductor, then shuts off dumping the energy through
the synchronous rectifier to the output.
Ground of the IC
.
. Supplies the IC during start-up. After the output is running, the IC draws
OUT
. Pulling this pin low shuts down the regulator, isolating the load from the input.
. Pulling this pin below 0.39V causes the LBO pin to go low.
. This pin provides an active low signal to alert the user when the LBI
.
2
3
4
SHDN
LBI
LBO
5
6
FB
V
OUT
7
V
L
IN
. When servicing the
8
GND
Parameter
V
IN
,
V
Switch Voltage (V
Voltage on any other Pin
Peak Switch Current (Ipeak)
Output Current (I
Continuous Power Dissipation
Min.
-0.3
-0.3
-0.3
Max.
6.5
Units
V
V
V
OUT
Voltages (Relative to GND)
to GND)
L
V
V
OUT
+ 0.3
OUT
+ 0.3
— Internally Limited —
500
525
315
124
206
150
150
300
OUT
)
mA
mW
TSSOP Package
MSOP Package
TSSOP Package
MSOP Package
Thermal Resistance (
θ
JA
)
°C/W
Junction Temperature
Storage Temperature Range
Lead Temperature (soldering, 10s)
°C
°C
°C
-65
V
IN
GND
V
L
V
OUT
FB
1
2
3
4
8
7
TOP VIEW
8-Pin TSSOP and MSOP
6
5
SHDN
LBI
LB0
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| FAN4855MUX | 制造商:FAIRCHILD 制造商全稱:Fairchild Semiconductor 功能描述:500mA High Efficiency Boost Regulator with Adjustable Output, Shutdown and Low Battery Detect |
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