7A V
ERY
L
OW
D
ROPOUT
P
OSITIVE
A
DJUSTABLE
R
EGULATOR
LX8580
PRODUCT DATABOOK 1996/1997
3
Copyright © 1999
Rev. 1.1
PRODUCTION DATA SHEET
Reference Voltage VREF VCTRL = 2.75V, VPWR = 2V, ILOAD = 10mA, TJ = 25°C
VCTRL
= 2.7V to 6V,
VPWR
= 1.75V to 5.5V, I
OUT
= 10mA to 4A
VCTRL
= 2.7V to 6V,
VPWR
= 2.05V to 5.5V, I
OUT
= 10mA to 7A
Line Regulation ∆VREF (VIN)
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
Load Regulation
∆V
REF
(I
OUT
)
VCTRL = 2.75V, VPWR = 2.1V, ILOAD = 10mA to 7A (VADJ = 0)
Thermal Regulation ∆VOUT (Pwr) 30ms Pulse
Thermal Resistance RθJT Control Circuitry/Power Transistor
Ripple Rejection VCTRL = VPWR = 3.75V Avg, VRIPPLE = 1VP-P, VADJ = 0V, IOUT = 4A
Control Pin Current (Note 3) ICTRL VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 100mA
VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 4A
VCTRL = 2.75V, VPWR = 1.75V, ILOAD = 4A
VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 7A
Adjust Pin Current IADJ VCTRL = 2.75V, VPWR = 2.05V, ILOAD = 0mA (VADJ = 0)
Current Limit Iθ(MAX) VCTRL = 2.75V, VPWR = 2.05V, ∆VOUT = 100mV (VADJ = 0)
Dropout Voltage (Control Section) VCTRL - VOUT VPWR = 2.05V, ILOAD = 100mA
Minimum VCTRL (Note 2) VPWR = 2.05V, ILOAD = 1A
(VPWR - VOUT)V
PWR = 2.05V, ILOAD = 2.75A
VPWR = 2.05V, ILOAD = 4A
VPWR = 2.05V, ILOAD = 7A
Dropout Voltage (Power Section) VPWR - VOUT VCTRL = 2.75V, ILOAD = 100mA
Minimum VPWR (Note 2) VCTRL = 2.75V, ILOAD = 1A
(VPWR - VOUT)V
CTRL = 2.75V, ILOAD = 2.75A
(VADJ = 0) VCTRL = 2.75V, ILOAD = 4A, TJ = 25°C
VCTRL = 2.75V, ILOAD = 4A
VCTRL = 2.75V, ILOAD = 7A, TJ = 25°C
VCTRL = 2.75V, ILOAD = 7A
Minimum Load Current VCTRL = 5V, VPWR = 3.3V, VADJ = 0V
ELECTRICAL CHARACTERISTICS
(Unless otherwise specified, these specifications apply over the operating ambient temperatures 0°C ≤ TA ≤ 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 Units
LX8580
Min. Typ. Max.
1.243 1.250 1.257 V
1.237 1.250 1.263 V
1.237 1.250 1.263 V
13mV
26mV
27mV
0.002 0.020 %/W
0.65 2.70 °C/W
60 80 dB
310mA
30 60 mA
33 70 mA
60 120 mA
60 120 µA
7.1 9 A
0.90 1.15 V
1.00 1.15 V
1.05 1.18 V
1.06 1.20 V
1.10 1.30 V
0.05 0.17 V
0.10 0.22 V
0.20 0.38 V
0.30 0.40 V
0.30 0.50 V
0.52 0.62 V
0.56 0.80 V
510mA
Note 2. Dropout is caused by either minimum control voltage (VCTRL) or minimum power voltage (VPWR). Both parameters are specified with respect to
the output voltage. The specifications represent the minimum input/output voltage required to maintain 1% regulation.
Note 3. 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.