LX8940 查看數據表（PDF） - Microsemi Corporation
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LX8940 Datasheet PDF : 6 Pages
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LX8940
TM
®
5V Low Dropout Regulator
PRODUCTION DATA SHEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature -40°C to +125°C for the LX8940IP
and 0°C to +125°C for LX8940CP; VIN = 10V, IO = 1A, COUT = 22µF, and for DC characteristics only. Low duty cycle pulse testing
techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Symbol
Test Conditions
` SECTION HEADER
Output Voltage
Line Regulation
Load Regulation
Output Impedance (Note 3)
Quiescent Current
Output Noise Voltage (Note 3)
VO
∆VOI
∆VOL
rO
IQ
VORMS
IO = 0A, TA = 25°C
7V < VIN < 26, IO =5mA
50mA < IO < 1A
100mADC and 20mARMS, fO = 120Hz
IO < 5mA, 7 < VIN < 26V
IO = 500mA
IO = 1000mA
10Hz – 100kHz, IO = 5mA
Long Term Stability (Note 3)
Ripple Rejection (Note 3)
RR
fO = 120Hz, 1VRMS, IO = 100mA
IO = 100mA
Dropout Voltage
∆V IO = 500mA
IO = 1A
Current Limit
ICL
VIN = 26V
Maximum Operational Input
Voltage
VIN(MAX)
Maximum Line Transient
VIN(TR) RO = 100Ω, T < 100mS
Note 3: These parameters, although guaranteed, are not tested in production.
LX8940
Units
Min Typ Max
4.85 5 5.15 V
1
50 mV
10 50 mV
200
mΩ
3
15 mA
30 50 mA
115 180 mA
150
µVRMS
20
mV /
1000hr
66
dB
150 300 mV
275 500 mV
400 800 mV
1
1.2
A
26
31
V
60
V
SIMPLIFIED BLOCK DIAGRAM
Input
Voltage
* Required if regulator is located far from power supply filter
C1
0.1µF
Input
1
LX8940
Output
Output
2
Voltage
C2
Overvoltage
10µF
Thermal
Shutdown
+
_
Regulator
Bias
GND
3
1.23V
Reference
Figure 1 – Simplified Block Diagram
Copyright © 2000
Rev. 1.3a, 2005-11-18
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
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