LX8580 Datasheet, PDF (3/4 Pages) Microsemi Corporation – 7A VERY LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR

PRODUCT DATABOOK 1996/1997
7A VERY LOW DROPOUT POSITIVE ADJUSTABLE REGULATOR
PRODUCTION DATA SHEET
LX8580
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures 0°C ≤ T_A ≤ 125°C. Low duty cycle pulse testing
techniques are used which maintains junction and case temperatures equal to the ambient temperature.)
Parameter
Symbol
Test Conditions
LX8580
Units
Min. Typ. Max.
Reference Voltage
Line Regulation
Load Regulation
Thermal Regulation
Thermal Resistance
Ripple Rejection
Control Pin Current (Note 3)
Adjust Pin Current
Current Limit
Dropout Voltage (Control Section)
Minimum V_CTRL (Note 2)
(V_PWR - V_OUT)
Dropout Voltage (Power Section)
Minimum V_PWR (Note 2)
(V_PWR - V_OUT)
(V_ADJ = 0)
Minimum Load Current
V_REF
V_CTRL = 2.75V, V_PWR = 2V, I_LOAD = 10mA, T_J = 25°C
V_CTRL = 2.7V to 6V, V_PWR = 1.75V to 5.5V, I_OUT = 10mA to 4A
V_CTRL = 2.7V to 6V, V_PWR = 2.05V to 5.5V, I_OUT = 10mA to 7A
∆V_REF (V_IN) V_CTRL = 2.5V to 12V, V_PWR = 1.75V to 5.5V, I_LOAD = 10mA, T_J = 25°C
V_CTRL = 2.5V to 12V, V_PWR = 1.75V to 5.5V, I_LOAD = 10mA
∆V_REF (I_OUT) V_CTRL = 2.75V, V_PWR = 2.1V, I_LOAD = 10mA to 7A (V_ADJ = 0)
∆V_OUT (Pwr) 30ms Pulse
R_θJT Control Circuitry/Power Transistor
V_CTRL = V_PWR = 3.75V Avg, V_RIPPLE = 1V_P-P, V_ADJ = 0V, I_OUT = 4A
I_CTRL
V_CTRL = 2.75V, V_PWR = 2.05V, I_LOAD = 100mA
V_CTRL = 2.75V, V_PWR = 2.05V, I_LOAD = 4A
V_CTRL = 2.75V, V_PWR = 1.75V, I_LOAD = 4A
V_CTRL = 2.75V, V_PWR = 2.05V, I_LOAD = 7A
I_ADJ
V_CTRL = 2.75V, V_PWR = 2.05V, I_LOAD = 0mA (V_ADJ = 0)
I_θ(MAX) V_CTRL = 2.75V, V_PWR = 2.05V, ∆V_OUT = 100mV (V_ADJ = 0)
V_CTRL - V_OUT V_PWR = 2.05V, I_LOAD = 100mA
V_PWR = 2.05V, I_LOAD = 1A
V_PWR = 2.05V, I_LOAD = 2.75A
V_PWR = 2.05V, I_LOAD = 4A
V_PWR = 2.05V, I_LOAD = 7A
V_PWR - V_OUT V_CTRL = 2.75V, I_LOAD = 100mA
V_CTRL = 2.75V, I_LOAD = 1A
V_CTRL = 2.75V, I_LOAD = 2.75A
V_CTRL = 2.75V, I_LOAD = 4A, T_J = 25°C
V_CTRL = 2.75V, I_LOAD = 4A
V_CTRL = 2.75V, I_LOAD = 7A, T_J = 25°C
V_CTRL = 2.75V, I_LOAD = 7A
V_CTRL = 5V, V_PWR = 3.3V, V_ADJ = 0V
1.243
1.237
1.237
60
7.1
1.250
1.250
1.250
1
2
2
0.002
0.65
80
3
30
33
60
60
9
0.90
1.00
1.05
1.06
1.10
0.05
0.10
0.20
0.30
0.30
0.52
0.56
5
1.257
1.263
1.263
3
6
7
0.020
2.70
10
60
70
120
120
1.15
1.15
1.18
1.20
1.30
0.17
0.22
0.38
0.40
0.50
0.62
0.80
10
V
V
V
mV
mV
mV
%/W
°C/W
dB
mA
mA
mA
mA
µA
A
V
V
V
V
V
V
V
V
V
V
V
V
mA
Note 2.
Note 3.
Dropout is caused by either minimum control voltage (V ) or minimum power voltage (V ). Both parameters are specified with respect to
CTRL
PWR
the output voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation.
The control pin current is the drive current required for the output transistor. This current will track output current with roughly a 1:100 ratio.
The minimum value is equal to the quiescent current of the device.
Copyright © 1999
Rev. 1.0 11/99
3