LX8941CDD-TR(2005) 查看數據表（PDF） - Microsemi Corporation
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LX8941CDD-TR Datasheet PDF : 5 Pages
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LX8941
TM
®
Adjustable Low Dropout Regulator
PRELIMINARY DATA SHEET
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, the following specifications apply over the operating ambient temperature of 0°C to 125°C for the LX8941CP;
VIN = 10V, IO = 1A, COUT = 22µF and are for DC characteristics only. Low duty cycle pulse testing techniques are used which maintain
junction and case temperatures equal to the ambient temperature. Note 3: The output voltage range is 4 to 25V and is determined by the
two external resistor, R1 and R2. See Product Highlight.
Parameter
Symbol
Test Conditions
ADJ Pin Voltage (Note 3)
Line Regulation
Load Regulation
Dropout Voltage
Quiescent Current
Adjust Pin Current
Current Limit
Output Noise Voltage (Note 4)
VADJ
∆VOI
∆VOL
∆V
IQ
IADJ
ICL
VO RMS
IO = 0A, TA = 25°C
VO + 2V < VIN < 26V, IO = 5mA
50mA < IO < 1A, VO = VADJ
IO = 100mA
IO = 500mA
IO = 1A
IO = < 5mA, 7 < VIN < 26V
IO = 500mA
IO = 1000mA
VIN = 10V, IO = 1A
VIN = 26V
10Hz – 100kHz, IO = 5mA
Long Term Stability (Note 4)
Ripple Rejection (Note 4)
` Enable Logic Section
On Threshold Voltage
On Threshold Current
Off Threshold Voltage
Off Threshold Current
RR
fO = 120Hz, 1VRMS, IO = 100mA
Note 4: These parameters although guaranteed, are not tested in production.
Min
1.225
1
LX8941
Typ
1.25
1
10
150
275
400
3
30
115
2
1.2
150
20
66
Max
1.275
50
50
300
500
800
15
50
180
20
Units
V
mV
mV
mV
mV
mV
mA
mA
mA
µA
A
µVRMS
mV /
1000hr
dB
2
V
0.1
50
µA
0.8
V
-10
-0.3
µA
SIMPLIFIED BLOCK DIAGRAM
INPUT
VOLTAGE
C1*
VIN
0.1µF
ON /
OFF
ON
OFF
Thermal
Shutdown
ON / OFF
Circuit
LX8941
VO
ADJ
+
-
GND
OUTPUT
VOLTAGE
C2
10µF
Figure 1 – Simplified Block Diagram
Copyright © 2001
Rev. 0.7a, 2005-11-10
Microsemi
Integrated Products Division
11861 Western Avenue, Garden Grove, CA. 92841, 714-898-8121, Fax: 714-893-2570
Page 3
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