LTC3376 datasheet(5/28 Pages) AD

5 / 28 page

LTC3376

Rev 0

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ELECTRICAL CHARACTERISTICS

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 LTC3376 is tested under pulsed load conditions such

that TJ ~ TA. The LTC3376E is guaranteed to meet specifications from

0°C to 85°C 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

LTC3376I is guaranteed over the –40°C to 125°C operating junction

temperature range. High junction temperatures degrade operating

lifetimes; operating lifetime is derated for junction temperatures greater

than 125°C. Note that the maximum ambient temperature consistent

with these specifications is determined by specific operating conditions

in conjunction with board layout, the rated package thermal impedance

and other environmental factors. The junction temperature (TJ in °C) is

calculated from ambient temperature (TA in °C) and power dissipation (PD

in Watts) according to the formula:

TJ = TA + (PD • θJA)

where θJA (in °C/W) is the package thermal impedance.

Note 3: There will be additional switching current on VINA-H pins.

Note 4: Total System current is defined as total current from VCC + VINA-H

when all bucks are on (in Sleep), VCC = VINA-H = 12V, and EXTVCC is boot-

strapped to run off of a 3.3V buck.

Note 5: The current limit features of this part are intended to protect the

IC from short term or intermittent fault conditions. Continuous operation

above the specified maximum pin current rating may result in device

degradation over time.

Note 6: The Soft-Start Time is the time from the start of switching until

VFB+ – VFB– reaches 360mV.

Note 7: The LTC3376 includes overtemperature protection which protects

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.

LTC3376 Scheda tecnica(PDF) 5 Page - Analog Devices