Datasheet LT1581, LT1581-2.5 (Analog Devices) - 3

LT1581/LT1581-2.5
ELECTRICAL CHARACTERISTICS The
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denotes specifications which apply over the full operating temperature range, otherwise specifications are at TA = 25
°
C. (Note 2) PARAMETER CONDITIONS MIN TYP MAX UNITS Dropout Voltage (Note 3)
Minimum VCONTROL: LT1581-2.5 VPOWER = 3.3V, ILOAD = 100mA ● 1.02 1.25 V (VCONTROL – VOUT) VPOWER = 3.3V, ILOAD = 1A ● 1.04 1.27 V VPOWER = 3.3V, ILOAD = 4A ● 1.06 1.30 V VPOWER = 3.3V, ILOAD = 7A ● 1.10 1.33 V VPOWER = 3.3V, ILOAD = 10A ● 1.12 1.35 V Minimum VCONTROL: LT1581 VPOWER = 2.05V, ILOAD = 100mA ● 1.02 1.25 V (VCONTROL – VOUT) VPOWER = 2.05V, ILOAD = 1A ● 1.04 1.27 V (VADJ = 0V) VPOWER = 2.05V, ILOAD = 4A ● 1.06 1.30 V VPOWER = 2.05V, ILOAD = 7A ● 1.10 1.33 V VPOWER = 2.05V, ILOAD = 10A ● 1.12 1.35 V Minimum VPOWER: LT1581-2.5 VCONTROL = 5V, ILOAD = 100mA ● 0.10 0.20 V (VPOWER – VOUT) VCONTROL = 5V, ILOAD = 1A ● 0.13 0.25 V VCONTROL = 5V, ILOAD = 4A, TJ = 25°C 0.22 0.33 V VCONTROL = 5V, ILOAD = 4A ● 0.37 V VCONTROL = 5V, ILOAD = 7A, TJ = 25°C 0.31 0.45 V VCONTROL = 5V, ILOAD = 7A ● 0.55 V VCONTROL = 5V, ILOAD = 10A, TJ = 25°C 0.43 0.63 V VCONTROL = 5V, ILOAD = 10A ● 0.70 V Minimum VPOWER: LT1581 VCONTROL = 2.75V, ILOAD = 100mA ● 0.10 0.20 V (VPOWER – VOUT) VCONTROL = 2.75V, ILOAD = 1A ● 0.13 0.25 V (VADJ = 0V) VCONTROL = 2.75V, ILOAD = 4A, TJ = 25°C 0.22 0.33 V VCONTROL = 2.75V, ILOAD = 4A ● 0.37 V VCONTROL = 2.75V, ILOAD = 7A, TJ = 25°C 0.31 0.45 V VCONTROL = 2.75V, ILOAD = 7A ● 0.55 V VCONTROL = 2.75V, ILOAD = 10A, TJ = 25°C 0.43 0.63 V VCONTROL = 2.75V, ILOAD = 10A ● 0.70 V
Note 1:
Absolute Maximum Ratings are those values beyond which the life
Note 4:
For the LT1581 adjustable device the minimum load current is the of a device may be impaired. minimum current required to maintain regulation. Normally, the current in
Note 2:
Unless otherwise specified, V the resistor divider used to set the output voltage is selected to meet the OUT = VSENSE. For the LT1581 adjustable device, V minimum load current requirement. ADJ = 0V.
Note 3:
For the LT1581, dropout is caused by either minimum control
Note 5:
The CONTROL pin current is the drive current required for the voltage (V output transistor. This current will track output current with roughly a CONTROL) or minimum power voltage (VPOWER). Both parameters are specified with respect to the output voltage. The specifications represent 1:100 ratio. The minimum value is equal to the quiescent current of the the minimum input-to-output voltage required to maintain 1% regulation. device. 3