LX8385-XXCDD Просмотр технического описания (PDF) - Microsemi Corporation
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LX8385-XXCDD Datasheet PDF : 8 Pages
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PRODUCT DATABOOK 1996/1997
LX8385-xx/8385A-xx/8385B-xx
3A LOW DROPOUT POSITIVE REGULATORS
P R O D U C T I O N D ATA S H E E T
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8385-xxC/85A/85B-xxC with 0°C ≤ TA ≤
125°C and the LX8385-xxI with -25°C ≤ TA ≤ 125°C; VIN - VOUT = 3V; IOUT = 3A. Low duty cycle pulse testing techniques are used which maintains
junction and case temperatures equal to the ambient temperature.)
LX8385-00/85A/85B-00 (Adjustable)
Parameter
Symbol
Test Conditions
LX8385/85A/85B-00 Units
Min. Typ. Max.
Reference Voltage LX8385-00
VREF IOUT = 10mA, TA = 25°C
(Note 4)
10mA ≤ IOUT ≤ IOUT , (MAX) 1.5V ≤ (VIN - VOUT), VIN ≤ 10V, P ≤ PMAX
LX8385A/85B-00
IOUT = 10mA, TA = 25°C
10mA ≤ IOUT ≤ IOUT , (MAX) 1.5V ≤ (VIN - VOUT), VIN ≤ 10V, P ≤ PMAX
Line Regulation (Note 2)
∆VREF (VIN) 1.5V ≤ (VIN - VOUT) ≤ 7V, IOUT = 10mA
Load Regulation (Note 2)
∆VREF (IOUT) VIN - VOUT = 3V, 10mA ≤ IOUT ≤ 3A
Thermal Regulation
∆VOUT(Pwr) TA = 25°C, 20ms pulse
Ripple Rejection (Note 3)
VOUT = 5V, f =120Hz, COUT = 100µf Tantalum, VIN = 6.5V
CADJ = 10µF, IOUT = 3A
Adjust Pin Current
IADJ
Adjust Pin Current Change (Note 4)
∆ IADJ 10mA ≤ IOUT ≤ IOUT (MAX) , 1.5V ≤ (VIN - VOUT), VIN ≤ 10V
Dropout Voltage
LX8385-00
∆ V ∆VREF = 1%, IOUT = 3A
LX8385A/85B-00
∆VREF = 1%, IOUT = 3A
Minimum Load Current
IOUT (MIN) VIN ≤ 10V
Maximum Output Current
IOUT (MAX) (VIN - VOUT) ≤ 7V, VIN ≤ 10V
Temperature Stability (Note 3)
∆VOUT (T)
Long Term Stability (Note 3)
∆VOUT (t) TA = 125°C, 1000 hours
RMS Output Noise (% of VOUT) (Note 3) VOUT (RMS) TA = 25°C, 10Hz ≤ f ≤ 10kHz
1.238
1.225
1.240
1.238
65
1.250
1.250
1.250
1.250
0.015
0.2
0.01
83
1.262
1.270
1.260
1.262
0.2
0.5
0.04
V
V
V
V
%
%
%/W
dB
55 100 µA
0.2
5
µA
1.2 1.5
V
1.1 1.3
V
2
10 mA
3
3.5
A
0.25
%
0.3
1
%
0.003
%
LX8385-33/85A-33/85B-33 (3.3V Fixed)
Parameter
Symbol
Test Conditions
LX8385/85A/85B-33 Units
Min. Typ. Max.
Output Voltage
LX8385-33
VOUT VIN = 5V, IOUT = 0mA, TA = 25°C
(Note 4)
4.75V ≤ VIN ≤ 10V, 0mA ≤ IOUT ≤ 3A, P ≤ PMAX
LX8385A/85B-33
VIN = 5V, IOUT = 0mA, TA = 25°C
4.75V ≤ VIN ≤ 10V, 0mA ≤ IOUT ≤ 3A, P ≤ PMAX
Line Regulation (Note 2)
∆VOUT
(VIN )
4.75V ≤ VIN ≤ 7V
4.75V ≤ VIN ≤ 10V
Load Regulation (Note 2)
∆VOUT (IOUT) VIN = 5V, 0mA ≤ IOUT ≤ IOUT (MAX)
Thermal Regulation
∆VOUT(Pwr) TA = 25°C, 20ms pulse
Ripple Rejection (Note 3)
COUT = 100µF (Tantalum), IOUT = 3A
Quiescent Current
IQ
0mA ≤ IOUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V
Dropout Voltage
LX8385-33
∆V
∆VOUT = 1%, IOUT ≤ IOUT (MAX)
LX8385A/85B-33
∆VOUT = 1%, IOUT ≤ IOUT (MAX)
Maximum Output Current
IOUT (MAX) VIN ≤ 7V
Temperature Stability (Note 3)
∆VOUT (T)
Long Term Stability (Note 3)
∆VOUT (t) TA = 125°C, 1000 hours
RMS Output Noise (% of VOUT) (Note 3) VOUT (RMS) TA = 25°C, 10Hz ≤ f ≤ 10kHz
3.267
3.235
3.274
3.267
60
3
3.3
3.3
3.3
3.3
1
2
5
0.01
83
4
1.2
1.1
3.5
0.25
0.3
0.003
3.333
3.365
3.326
3.333
6
10
15
0.02
10
1.5
1.3
1
V
V
V
V
mV
mV
mV
%/W
dB
mA
V
V
A
%
%
%
Note 2. Regulation is measured at constant junction temperature, using pulse testing with a low duty cycle. Changes in output voltage due to
heating effects are covered under the specification for thermal regulation.
Note 3. These parameters, although guaranteed, are not tested in production.
Note 4. See Maximum Output Current Section above.
Copyright © 1999
Rev. 2.0a 10/00
3
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