3A L OW D ROPOUT P OSITIVE R EGULA TORS
LX8385-xx/8385A-xx/8385B-xx
PRODUCT DA T ABOOK 1996/1997
3
Copyright © 1999
Rev. 2.0a 10/00
P RODUCTION D AT A S HEET
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures for the LX8385-xxC/85A/85B-xxC with 0°C
≤ T
A ≤
125°C and the LX8385-xxI with -25°C
≤ T
A ≤ 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.)
Parameter
Symbol
Test Conditions
Units
LX8385/85A/85B-00
Min.
Typ.
Max.
Reference Voltage
LX8385-00
V
REF
I
OUT = 10mA,
T
A = 25°C
(Note 4)
10mA
≤ I
OUT ≤ IOUT (MAX), 1.5V ≤ (VIN - VOUT), VIN ≤ 10V, P ≤ PMAX
LX8385A/85B-00
I
OUT = 10mA,
T
A = 25°C
10mA
≤ I
OUT ≤ IOUT (MAX), 1.5V ≤ (VIN - VOUT), VIN ≤ 10V, P ≤ PMAX
Line Regulation (Note 2)
∆V
REF (VIN)
1.5V
≤ (V
IN - V OUT) ≤
7V, I
OUT = 10mA
Load Regulation (Note 2)
∆V
REF (IOUT)
V
IN - V OUT = 3V, 10mA ≤ IOUT ≤ 3A
Thermal Regulation
∆V
OUT (Pwr)
T
A = 25°C, 20ms pulse
Ripple Rejection (Note 3)
V
OUT =
5V, f =120Hz, C
OUT = 100µf
Tantalum, V
IN = 6.5V
C
ADJ = 10µF, I OUT = 3A
Adjust Pin Current
I
ADJ
Adjust Pin Current Change (Note 4)
∆ I
ADJ
10mA
≤ I
OUT ≤ IOUT (MAX) , 1.5V ≤ (VIN - VOUT), VIN ≤ 10V
Dropout Voltage
LX8385-00
∆ V
∆V
REF = 1%, IOUT = 3A
LX8385A/85B-00
∆V
REF = 1%, IOUT = 3A
Minimum Load Current
I
OUT (MIN)
V
IN ≤ 10V
Maximum Output Current
I
OUT (MAX)
(V
IN - VOUT) ≤ 7V, VIN ≤ 10V
Temperature Stability (Note 3)
∆V
OUT (T)
Long Term Stability (Note 3)
∆V
OUT (t)
T
A = 125°C, 1000 hours
RMS Output Noise (% of V
OUT) (Note 3)
V
OUT (RMS)
T
A = 25°C, 10Hz ≤ f ≤ 10kHz
1.238
1.250
1.262
V
1.225
1.250
1.270
V
1.240
1.250
1.260
V
1.238
1.250
1.262
V
0.015
0.2
%
0.2
0.5
%
0.01
0.04
%/W
65
83
dB
55
100
µA
0.2
5
µA
1.2
1.5
V
1.1
1.3
V
210
mA
3
3.5
A
0.25
%
0.3
1
%
0.003
%
Parameter
Symbol
Test Conditions
Units
LX8385/85A/85B-33
Min.
Typ.
Max.
Output Voltage
LX8385-33
V
OUT
V
IN = 5V, IOUT = 0mA, TA = 25°C
(Note 4)
4.75V
≤ V
IN ≤
10V, 0mA
≤ I
OUT ≤ 3A, P ≤ PMAX
LX8385A/85B-33
V
IN = 5V, IOUT = 0mA, TA = 25°C
4.75V
≤ V
IN ≤
10V, 0mA
≤ I
OUT ≤ 3A, P ≤ PMAX
Line Regulation (Note 2)
∆V
OUT
4.75V
≤ V
IN ≤ 7V
(V
IN )
4.75V
≤ V
IN ≤ 10V
Load Regulation (Note 2)
∆V
OUT (IOUT)
V
IN = 5V, 0mA ≤ IOUT ≤ IOUT (MAX)
Thermal Regulation
∆V
OUT(Pwr)
T
A = 25°C, 20ms pulse
Ripple Rejection (Note 3)
C
OUT = 100µF (Tantalum), IOUT = 3A
Quiescent Current
I
Q
0mA
≤ I
OUT ≤ IOUT (MAX) , 4.75V ≤ VIN ≤ 10V
Dropout Voltage
LX8385-33
∆V
∆V
OUT = 1%, IOUT ≤ IOUT (MAX)
LX8385A/85B-33
∆V
OUT = 1%, IOUT ≤ IOUT (MAX)
Maximum Output Current
I
OUT (MAX)
V
IN ≤ 7V
Temperature Stability (Note 3)
∆V
OUT (T)
Long Term Stability (Note 3)
∆V
OUT (t)
T
A = 125°C, 1000 hours
RMS Output Noise (% of V
OUT) (Note 3)
V
OUT (RMS)
T
A = 25°C, 10Hz ≤ f ≤ 10kHz
3.267
3.3
3.333
V
3.235
3.3
3.365
V
3.274
3.3
3.326
V
3.267
3.3
3.333
V
16
mV
210
mV
515
mV
0.01
0.02
% / W
60
83
dB
410
mA
1.2
1.5
V
1.1
1.3
V
3
3.5
A
0.25
%
0.3
1
%
0.003
%
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.
LX8385-00/85A/85B-00 (Adjustable)
LX8385-33/85A-33/85B-33 (3.3V Fixed)
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