LT3029 Ver la hoja de datos (PDF) - Linear Technology
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LT3029 Datasheet PDF : 20 Pages
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LT3029
ELECTRICAL CHARACTERISTICS
Note 7: GND pin current is tested with VIN = 2.437V and a current source
load. This means the device is tested while operating in its dropout region
or at the minimum input voltage specification. This is the worst-case
GND pin current. The GND pin current decreases slightly at higher input
voltages. Total GND pin current equals the sum of output 1 and output 2
GND pin currents.
Note 8: ADJ1/ADJ2 pin bias current flows into the pin.
Note 9: The LT3029 contains current limit foldback circuitry. See the
Typical Performance Characteristics for current limit as a function of the
VIN – VOUT differential voltage.
Note 10: SHDN1/ SHDN2 pin current flows into the pin.
Note 11: The LT3029 minimum input voltage specification limits dropout
voltage under some output voltage/load conditions. See the curve of
Minimum Input Voltage in the Typical Performance Characteristics.
Note 12: The LT3029 includes overtemperature protection that is intended
to protect the device during momentary overload conditions. Junction
temperature exceeds the maximum operating junction temperature when
overtemperature protection is active. Continuous operation above the
specified maximum operating junction temperature may impair device
reliability.
TYPICAL PERFORMANCE CHARACTERISTICS TJ = 25°C, unless otherwise noted.
Typical Dropout Voltage
500
450
TJ = 150°C
400
350
TJ = 125°C
300
250
TJ = 25°C
200
150
TJ = –55°C
100
50
0
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
3029 G01
Dropout Voltage vs Temperature
500
450
IL = 500mA
400
350
IL = 250mA
300
IL = 100mA
250
200
150
IL = 10mA
100
50
IL = 1mA
0
–75 –50 –25 0
IL = 50mA
25 50 75 100 125 150 175
TEMPERATURE (°C)
3029 G03
Guaranteed Dropout Voltage
500
= TEST POINTS
450
400
TJ = 150°C
350
300
TJ = 25°C
250
200
150
100
50
0
0 50 100 150 200 250 300 350 400 450 500
OUTPUT CURRENT (mA)
3029 G02
Quiescent Current (per Channel)
150
VIN = 6V
RL = 243k, IL = 5μA
125
100
75
VSHDN = VIN
50
25
0
–75 –50 –25 0 25 50 75 100 125 150 175
TEMPERATURE (°C)
3029 G04
3029fa
4
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