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參數(shù)資料
| 型號： | LX8942IDT |
| 廠商： | MICROSEMI CORP-ANALOG MIXED SIGNAL GROUP |
| 元件分類： | 基準(zhǔn)電壓源/電流源 |
| 英文描述： | Low Dropout Dual Regulator |
| 中文描述： | 8 V FIXED POSITIVE LDO REGULATOR, 1.2 V DROPOUT, PSSO5 |
| 封裝： | ROHS COMPLIANT, PLASTIC, TO-252, 5 PIN |
| 文件頁數(shù)： | 1/8頁 |
| 文件大?。?/td> | 240K |
| 代理商： | LX8942IDT |
LX8942
P
RODUCTION
D
ATA
S
HEET
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 1
Copyright
2005
Rev. 1.2, 2006-01-20
W
M
.
C
Low Dropout Dual Regulator
TM
D E S C R I P T I O N
The Microsemi LX8942 is a dual
8.2V/5V positive voltage regulator. One
output is a high current (up to 1000mA)
regulator that can be turned on or off by a
high
impedance
low
compatible switch. The second or standby
output remains on regardless. The on/off
switch not only shuts off the high current
output but actually puts the IC in a
micropower
mode,
quiescent
current.
characteristic coupled with an extremely
low dropout, (0.55V for output current of
10mA) makes the LX8942 well suited for
power systems that require standby
memory. The LX8942 includes other
features which were originally designed
for automotive applications. These include
protection
from
installations, double battery jumps and
load dump (transients).
current
TTL
achieving
This
low
unique
reverse
battery
The high current regulator has over
voltage shutdown to protect both the internal
circuitry and the load during line transients,
such as load dump (60V). In addition, the
high current regulator design also has built-
in protection for short circuit and thermal
overload. During these fault conditions of
the primary output, the standby regulator
will continue to power its load.
The LX8942 is the 8.2 volt, ±5% version
of a family of dual regulators with a standby
output voltage of 5V. Other high-current
outputs programmed for 5V and 12V
regulation are available in the SG29055,
SG29125 devices. They are designed to
function over the full automotive ambient
temperature range of -40°C to 85°C.
IMPORTANT:
For the most current data, consult
MICROSEMI
’s website:
http://www.microsemi.com
K E Y F E A T U R E S
2% Internally Trimmed Output
Two regulated outputs
Output current in excess of
1000mA
Low quiescent current standby
regulator
Drop-out Voltage, Input-output
differential <0.6V at 0.5A
Reverse battery protection
60V load dump protection
-50V reverse transient protection
Short circuit protection
Internal thermal overload
protection
ON/OFF switch for high current
output
Surface Mount TO-252
A P P L I C A T I O N S
Automotive electronics for
controls, entertainment and
safety functions
Continuous operation systems
P R O D U C T H I G H L I G H T
Over Voltage
Thermal
Shutdown
+
-
1
2
Regulator
Bias
1.23V
Reference
5V Standby
Regulator
3
4
5
LX8942
Input Voltage
(VIN)
C1*
0.1μF
ON/OFF Switch (for
output voltage only)
C2 **
47μF
Output Voltage (VOUT1)
(8.2V, 1000mA)
C3**
100μF
Ground
Standby Output (VSB)
(5V, 60mA)
* Required close to regulator package.
** Required for stability. May be increased without bound.
Capacitor must be rated to operate at the minimum
temperature expected for the regulator system.
P A C K A G E O R D E R I N F O
Plastic TO-252
5-Pin
RoHS Compliant / Pb-free
DT
T
J
(
°
C)
-40 to 85
LX8942IDT
Note: Available in Tape & Reel. Append the letters “TR” to the part number. (i.e. LX8942IDT-TR)
L
X
8
9
4
2
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