LX8940(1999) 查看數據表（PDF） - Microsemi Corporation
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LX8940 Datasheet PDF : 4 Pages
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PRODUCT DATABOOK 1996/1997
5V LOW DROPOUT REGULATOR
PR O D U C T I O N D ATA S H E E T
LX8940
RECOMMENDED OPERATING CONDITIONS
Parameter
Symbol
Recommended Operating Conditions
Min.
Typ.
Max.
Input Voltage
Load Current (with adequate heatsinking)
VIN
Note 2
5
Maximum Line Transient (Load Dump), VO ≤ 5.5V
Input Capacitor (VIN to GND)
0.1
Output Capacitor with ESR of 10Ω max., (VOUT to GND & VSB to GND)
10
Note 2. V
= 1.2∆V . See Dropout Voltage maximum limit.
IN (MIN)
(MAX)
26
1000
60
Units
V
mA
V
µF
µF
ELECTRICAL CHARACTERISTICS
Unless otherwise specified, these specifications apply over the operating ambient temperatures of -40°C to +125°C for LX8940IP, and 0°C to +125°C
for LX8940CP; VIN = 10V, IO = 1A, COUT = 22µF, and are 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
Output Voltage
Line Regulation
Load Regulation
Output Impedance (Note 3)
Quiescent Current
Output Noise Voltage (Note 3)
Long Term Stability (Note 3)
VO
∆VOI
∆VOL
rO
IQ
VO RMS
IO = 0A, TA = 25°C
7V ≤ VIN ≤ 26V, IO = 5mA
50mA ≤ IO ≤ 1A
100mADC and 20mARMS, fO = 120Hz
IO ≤ 5mA, 7 ≤ VIN ≤ 26V
IO = 500mA
IO = 1000mA
10Hz - 100kHz, IO = 5mA
Ripple Rejection (Note 3)
Dropout Voltage
Current Limit
Maximum Operational Input Voltage
Maximum Line Transient
RR
∆V
ICL
VIN (MAX)
VIN (TR)
fO = 120Hz, 1VRMS, IO = 100mA
IO = 100mA
IO = 500mA
IO = 1A
VIN = 26V
RO = 100Ω, T ≤ 100ms
Note 3. These parameters, although guaranteed, are not tested in production.
Min.
4.85
1
26
LX8940
Typ.
5
1
10
200
3
30
115
150
20
66
150
275
400
1.2
31
60
Max.
5.15
50
50
15
50
180
300
500
800
Units
V
mV
mV
mΩ
mA
mA
mA
µV
RMS
mV/1000hr
dB
mV
mV
mV
A
V
V
Copyright © 1999
Rev. 1.3 3/99
3
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