LA8385 Datasheet, PDF (3/8 Pages) List of Unclassifed Manufacturers – 3A LOW DROPOUT POSITIVE REGULATORS

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 ≤ T_A ≤
125°C and the LX8385-xxI with -25°C ≤ T_A ≤ 125°C; V_IN - V_OUT = 3V; I_OUT = 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
V_REF I_OUT = 10mA, T_A = 25°C
(Note 4)
10mA ≤ I_OUT ≤ I_OUT , _(MAX) 1.5V ≤ (V_IN - V_OUT), V_IN ≤ 10V, P ≤ P_MAX
LX8385A/85B-00
I_OUT = 10mA, T_A = 25°C
10mA ≤ I_OUT ≤ I_OUT , _(MAX) 1.5V ≤ (V_IN - V_OUT), V_IN ≤ 10V, P ≤ P_MAX
Line Regulation (Note 2)
∆V_REF (V_IN) 1.5V ≤ (V_IN - V_OUT) ≤ 7V, I_OUT = 10mA
Load Regulation (Note 2)
∆V_REF (I_OUT) V_IN - V_OUT = 3V, 10mA ≤ I_OUT ≤ 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 ≤ I_{OUT (MAX)} , 1.5V ≤ (V_IN - V_OUT), V_IN ≤ 10V
Dropout Voltage
LX8385-00
∆ V ∆V_REF = 1%, I_OUT = 3A
LX8385A/85B-00
∆V_REF = 1%, I_OUT = 3A
Minimum Load Current
I_{OUT (MIN)} V_IN ≤ 10V
Maximum Output Current
I_{OUT (MAX)} (V_IN - V_OUT) ≤ 7V, V_IN ≤ 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
1.225
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
V_OUT V_IN = 5V, I_OUT = 0mA, T_A = 25°C
(Note 4)
4.75V ≤ V_IN ≤ 10V, 0mA ≤ I_OUT ≤ 3A, P ≤ P_MAX
LX8385A/85B-33
V_IN = 5V, I_OUT = 0mA, T_A = 25°C
4.75V ≤ V_IN ≤ 10V, 0mA ≤ I_OUT ≤ 3A, P ≤ P_MAX
Line Regulation (Note 2)
∆V_OUT
(V_IN )
4.75V ≤ V_IN ≤ 7V
4.75V ≤ V_IN ≤ 10V
Load Regulation (Note 2)
∆V_OUT (I_OUT) V_IN = 5V, 0mA ≤ I_OUT ≤ I_{OUT (MAX)}
Thermal Regulation
∆V_OUT(Pwr) T_A = 25°C, 20ms pulse
Ripple Rejection (Note 3)
C_OUT = 100µF (Tantalum), I_OUT = 3A
Quiescent Current
I_Q
0mA ≤ I_OUT ≤ I_{OUT (MAX)} , 4.75V ≤ V_IN ≤ 10V
Dropout Voltage
LX8385-33
∆V
∆V_OUT = 1%, I_OUT ≤ I_{OUT (MAX)}
LX8385A/85B-33
∆V_OUT = 1%, I_OUT ≤ I_{OUT (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
3.235
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