Datasheet LT3086 (Analog Devices) - 5

LT3086
elecTrical characTerisTics
at the 150°C operating junction temperature. High junction temperatures
Note 11:
Reverse-output current is tested with the IN pin grounded and degrade operating lifetimes. Operating lifetime is derated at junction the OUT pin forced to a voltage. The current flows into the OUT pin and out temperatures greater than 125°C. of the GND pin.
Note 4:
The LT3086 is tested and specified for these conditions with the
Note 12:
The IC includes overtemperature protection circuitry that protects SET pin connected to the OUT pin, VOUT = 0.4V. the device during momentary overload conditions. Junction temperature
Note 5:
Maximum junction temperature limits operating conditions. The exceeds 125°C (LT3086E, LT3086I, LT3086MP) or 150°C (LT3086H) regulated output voltage specification does not apply for all possible when the overtemperature circuitry is active unless thermal limit is combinations of input voltage and output current. Limit the output current externally set by loading the TEMP pin. Continuous operation above the range if operating at large input-to-output voltage differentials. Limit specified maximum junction temperature may impair device reliability. the input-to-output voltage differential if operating at maximum output
Note 13:
The TEMP output voltage represents the average die temperature current. Current limit foldback limits the maximum output current as a next to the power transistor while the center of the transistor can be function of input-to-output voltage. See Current Limit vs VIN – VOUT in the significantly hotter during high power conditions. Due to power dissipation Typical Performance Characteristics section. and temperature gradients across the die, the TEMP output voltage
Note 6:
Load regulation is Kelvin-sensed at the package. measurement does not guarantee that absolute maximum junction
Note 7:
To satisfy minimum input voltage requirements, the LT3086 is temperature is not exceeded. tested and specified for these conditions with a 32k resistor between OUT
Note 14:
Output current sharing error is the difference in output currents and SET for a 2V output voltage. of a slave relative to its master when two LT3086 regulators are paralleled.
Note 8:
Dropout voltage is the minimum input-to-output voltage The device is tested as a slave with VTRACK = 0.693V, RMON = 330Ω differential needed to maintain regulation at a specified output current. and VSET = 0.4V, conditions when an ideal master is outputting 2.1A. In dropout, the output voltage equals: (V The specification limits account for the slave output tracking error from IN – VDROPOUT). For low output voltages and certain load conditions, minimum input voltage requirements 2.1A and the worst-case error that can be contributed by a master: the limit dropout voltage. See the Minimum Input Voltage curve in the Typical maximum deviation of VSET from 0.4V and IMON from 2.1mA. Performance Characteristics section.
Note 15:
The LT3086 is tested and specified for these conditions with the
Note 9:
GND pin current is tested with V I IN = VOUT(NOMINAL) + 0.55V and MON and ILIM pins tied together. PWRGD pin floating. GND pin current increases in dropout. See GND pin
Note 16:
The LT3086 requires a minimum load current to ensure proper current curves in the Typical Performance Characteristics section. regulation and stability.
Note 10:
SHDN pin current flows into the SHDN pin.
Typical perForMance characTerisTics TA = 25°C, unless otherwise noted. Typical Dropout Voltage Guaranteed Dropout Voltage Dropout Voltage
550 550 550 = TEST POINTS 500 500 500 450 450 450 IL = 2.1A 400 TAGE (mV) 400 400 TJ ≤ 125°C IL = 1.5A 350 350 350 TAGE (mV) 300 T TAGE (mV) J = 125°C 300 300 IL = 1A 250 250 TJ ≤ 25°C 250 200 TJ = 25°C 200 200 IL = 500mA DROPOUT VOL 150 150 DROPOUT VOL 150 IL = 100mA 100 100 100 50 GUARANTEED DROPOUT VOL 50 50 IL = 1mA 0 0 0 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 0 0.3 0.6 0.9 1.2 1.5 1.8 2.1 –75 –50 –25 0 25 50 75 100 125 150 175 OUTPUT CURRENT (A) OUTPUT CURRENT (A) TEMPERATURE (°C) 3086 G01 3086 G02 3086 G03 3086fb For more information www.linear.com/LT3086 5 Document Outline Features Applications Description Typical Application Absolute Maximum Ratings Order Information Electrical Characteristics Typical Performance Characteristics Pin Functions Block Diagram Applications Information Typical Applications Package Description Revision History Typical Application Related Parts