LT3021 datasheet(6/20 Pages) LINER

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LT3008 Series

3008fc

Note 1: Stresses beyond those listed under Absolute Maximum Ratings

may cause permanent damage to the device. Exposure to any Absolute

Maximum Rating condition for extended periods may affect device

reliability and lifetime.

Note 2: The LT3008 regulators are tested and speciﬁed under pulse

load conditions such that TJ ≅ TA. The LT3008E is guaranteed to meet

performance speciﬁcations from 0°C to 125°C operating junction

temperature. Speciﬁcations over the –40°C to 125°C operating junction

temperature range are assured by design, characterization and correlation

with statistical process controls. The LT3008I is guaranteed over the full

– 40°C to 125°C operating junction temperature range. The LT3008MP is

100% tested and guaranteed over the –55°C to 125°C operating junction

temperature range.

Note 3: The LT3008 adjustable version is tested and speciﬁed for these

conditions with the ADJ pin connected to the OUT pin.

Note 4: Operating conditions are limited by maximum junction

temperature. The regulated output voltage speciﬁcation will not apply

for all possible combinations of input voltage and output current. When

operating at the maximum input voltage, the output current range must be

limited. When operating at the maximum output current, the input voltage

must be limited.

Note 5: Dropout voltage is the minimum input to output voltage differential

needed to maintain regulation at a speciﬁed output current. In dropout, the

output voltage equals (VIN – VDROPOUT). For the LT3008-1.2 and LT3008-

1.5, dropout voltage will be limited by the minimum input voltage.

Note 6: To satisfy minimum input voltage requirements, the LT3008

adjustable version is tested and speciﬁed for these conditions with an

external resistor divider (61.9k bottom, 280k top) which sets VOUT to 3.3V.

The external resistor divider adds 9.69μA of DC load on the output. This

external current is not factored into GND pin current.

Note 7: GND pin current is tested with VIN = VOUT(NOMINAL) + 0.55V and

a current source load. GND pin current will increase in dropout. For the

ﬁxed output voltage versions, an internal resistor divider will add about

1μA to the GND pin current. See the GND Pin Current curves in the Typical

Performance Characteristics section.

Note 8: The SHDN pin can be driven below GND only when tied to the IN

pin directly or through a pull-up resistor. If the SHDN pin is driven below

GND by more than –0.3V while IN is powered, the output will turn on.

Note 9: Output noise is listed for the adjustable version with the ADJ pin

connected to the OUT pin. See the RMS Output Noise vs Load Current

curve in the Typical Performance Characteristics Section.

ELECTRICAL CHARACTERISTICS The l denotes the speciﬁcations which apply over the full operating

temperature range, otherwise speciﬁcations are at TJ = 25°C. (Note 2)

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

Current Limit

VIN = 45V, VOUT = 0

VIN = VOUT(NOMINAL) + 1V, ΔVOUT = – 5%

Input Reverse-Leakage Current

VIN = –45V, VOUT = 0

130

μA

Reverse-Output Current

VOUT = 1.2V, VIN = 0

0.6

μA

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