LT1580 查看數據表（PDF） - Linear Technology
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LT1580 Datasheet PDF : 16 Pages
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LT1580/LT1580 -2.5
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum VPOWER: LT1580-2.5
(VPOWER – VOUT)
Minimum VPOWER: LT1580
(VPOWER – VOUT)
(VADJ = 0V)
CONDITIONS
VCONTROL = 5V, ILOAD = 100mA
VCONTROL = 5V, ILOAD = 1A
VCONTROL = 5V, ILOAD = 4A, TJ = 25°C
VCONTROL = 5V, ILOAD = 4A
VCONTROL = 5V, ILOAD = 7A, TJ = 25°C
VCONTROL = 5V, ILOAD = 7A, 0°C ≤ TJ ≤ 125°C
VCONTROL = 5V, ILOAD = 6.5A, – 40°C ≤ TJ ≤ 0°C
VCONTROL = 2.75V, ILOAD = 100mA
VCONTROL = 2.75V, ILOAD = 1A
VCONTROL = 2.75V, ILOAD 2.75A
VCONTROL = 2.75V, ILOAD = 4A, TJ = 25°C
VCONTROL = 2.75V, ILOAD = 4A
VCONTROL = 2.75V, ILOAD = 7A, TJ = 25°C
VCONTROL = 2.75V, ILOAD = 7A, 0°C ≤ TJ ≤ 125°C
VCONTROL = 2.75V, ILOAD = 6.5A, – 40°C ≤ TJ ≤ 0°C
MIN TYP MAX UNITS
q
0.10 0.17
V
q
0.15 0.22
V
0.34 0.40
V
q
0.50
V
0.54 0.62
V
0.70 0.80
V
0.70 0.80
V
q
0.10 0.17
V
q
0.15 0.22
V
q
0.26 0.38
V
0.34 0.40
V
q
0.50
V
0.54 0.62
V
0.70 0.80
V
0.70 0.80
V
The q denotes specifications which apply over the full operating
temperature range.
Note 1: Unless otherwise specified VOUT = VSENSE. For the LT1580
adjustable device VADJ = 0V.
Note 2: For the LT1580, dropout is caused by either minimum control
voltage (VCONTROL) or minimum power voltage (VPOWER). 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: For the LT1580 adjustable device the minimum load current is the
minimum current required to maintain regulation. Normally the current in
the resistor divider used to set the output voltage is selected to meet the
minimum load current requirement.
Note 4: 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.
TYPICAL PERFORMANCE CHARACTERISTICS
Control Pin Current
vs Output Current
140
INDICATES GUARANTEED TEST POINTS
120 0°C ≤ TJ ≤ 125°C
100
DATA SHEET LIMIT
80
60
TYPICAL
DEVICE
40
20
0
01
2 34 5
OUTPUT CURRENT (A)
67
1580 G01
Minimum Control Voltage
2
INDICATES GUARANTEED TEST POINTS
0°C ≤ TJ ≤ 125°C
DATA SHEET LIMIT
1
TJ = 125°C
TJ = 25°C
0
012 34 567
OUTPUT CURRENT (A)
1580 G02
Dropout Voltage —
Minimum Power Voltage
1.0
INDICATES GUARANTEED TEST POINTS
0°C ≤ TJ ≤ 125°C
DATA SHEET LIMIT
0.5
TJ = 125°C
TJ = 25°C
0
012 34 567
OUTPUT CURRENT (A)
1580 G03
4
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