LTM4607 datasheet(5/28 Pages) LINER

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LTC3780

3780fe

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: TJ for the QFN package is calculated from the temperature TA and

power dissipation PD according to the following formula:

TJ = TA + (PD • 34°C/W)

Note 3: The IC is tested in a feedback loop that servos VITH to a speciﬁed

voltage and measures the resultant VOSENSE.

Note 4: Dynamic supply current is higher due to the gate charge being

delivered at the switching frequency.

Note 5: Rise and fall times are measured using 10% and 90% levels. Delay

times are measured using 50% levels.

Note 6: The minimum on-time condition is speciﬁed for an inductor

peak-to-peak ripple current ≥ 40% of IMAX (see minimum on-time

considerations in the Applications Information section).

Note 7: The LTC3780E is guaranteed to meet performance speciﬁcations

from 0°C to 85°C. Performance over the –40°C to 85°C operating junction

temperature range is assured by design, characterization and correlation

with statistical process controls. The LTC3780I is guaranteed over the

–40°C to 125°C operating junction temperature range. The LTC3780MP

is guaranteed and tested over the full –55 to 125°C operating junction

temperature range.

Note 8: This parameter is guaranteed by design.

Note 9: fOSC is the running frequency for the application.

SYMBOL

PARAMETER

CONDITIONS

MIN

TYP

MAX

UNITS

PGOOD Output

∆VFBH

PGOOD Upper Threshold

VOSENSE Rising

5.5

7.5

∆VFBL

PGOOD Lower Threshold

VOSENSE Falling

–5.5

–7.5

–10

∆VFB(HYST)

PGOOD Hysteresis

VOSENSE Returning

2.5

VPGL

PGOOD Low Voltage

IPGOOD = 2mA

0.1

0.3

IPGOOD

PGOOD Leakage Current

VPGOOD = 5V

±1

μA

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

junction temperature range, otherwise speciﬁcations are at TA = 25°C. VIN = 15V unless otherwise noted.

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