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參數(shù)資料
| 型號(hào)： | LX1882-33CDM |
| 英文描述： | Charge Pump |
| 中文描述： | 電荷泵 |
| 文件頁數(shù)： | 7/13頁 |
| 文件大?。?/td> | 309K |
| 代理商： | LX1882-33CDM |
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 7
Copyright
2000
Rev. 1.0c, 2002-08-01
W
M
.
C
LX1882
Charge Pump Doubler with Linear Regulator
P
RODUCTION
D
ATA
S
HEET
I N T E G R A T E D P R O D U C T S
A P P L I C A T I O N I N F O R M A T I O N ( C O N T I N U E D )
Temperature Protection
The thermal protection shuts the LX1882 down when the
junction temperature exceeds 140
C. Exposure to absolute
maximum rated conditions for extended periods may affect
device reliability (see Thermal Considerations below).
P
OWER
-O
N
R
ESET
The LX1882 contains power-on reset circuitry that insures all
internal functions are correctly initialized upon power-up. Once
the input voltage reaches approximately 1V, the power-on reset
circuit enables the device as long as the
SHDN
pin is held high.
S
HUTDOWN
The
SHDN
pin allows the LX1882 to be enabled or disabled.
A logic zero (0.4V) on the
SHDN
pin places the LX1882 in
shutdown mode, reducing the supply current to < 5uA and
connecting V
OUT
to ground through a 100
switch. In addition,
CPO will be high impedance and disconnected from V
IN
. If the
shutdown feature is not required, connect
SHDN
to V
IN
to
continuously enable the part.
Current Limit Protection
The LX1882 includes over current protection. When the output
load current exceeds typically 60mA, the circuit forces the
regulator output to decrease.
T
HERMAL
C
ONSIDERATIONS
Thermal shutdown protects the circuit from thermal overload
caused from a rise in junction temperature during power
dissipation. This means of protection is intended for fault
protection only and not as a means from current or power
limiting during normal application usage. Proper thermal
evaluation should be done to ensure that the junction temperature
does not exceed its maximum rating (125°C). Due to variation in
individual device electrical characteristics and thermal
resistance, the built in thermal overload protection may be
activated at power levels slightly above or below the rated
dissipation.
A
P
P
L
I
C
A
T
I
O
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