LTC7899 datasheet(9/50 Pages) AD

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Data Sheet

LTC7899

analog.com

Rev. 0

9 of 50

ABSOLUTE MAXIMUM RATINGS

TA = 25°C, unless otherwise specified. All pins are with respect to VIN– unless otherwise noted.

Table 2. Absolute Maximum Ratings

PARAMETER

RATING

Bias Input Supply (VBIAS)

–0.3V to 140V

RUN

–0.3V to 140V

BOOST

–0.3V to 150V

–5V to 150V

BOOST to SW

–0.3V to 15V

TGUP, TGDN, BGUP, BGDN1

Not applicable

EXTVCC

–0.3V to 30V

DRVCC

–0.3V to 14V

EXTVCC to DRVCC

-6V to 30V

INTVCC

–0.3V to 6V

VFBB

–0.3V to 6V

PLLIN/SPREAD, FREQ, PHASMD

–0.3V to 6V

SS, ITH, ILIM

–0.3V to 6V

DRVSET, DRVUV, PGOOD

–0.3V to 6V

DTCA, DTCB, MODE, CLKOUT

–0.3V to 6V

VFBA

–0.3V to 140V

VFBA to SENSE–

–0.3V to 0.3V

SENSE+, SENSE–

–0.3V to 140V

SENSE+ to SENSE– Continuous

–0.3V to 6V

SENSE+ to SENSE– < 1ms

-100mA to 100mA

Operating Junction Temperature Range2

–40°C to 150°C

Storage Temperature Range

–65°C to 150°C

Do not apply a voltage or current source to these pins. They must be connected to capacitive loads only.

Otherwise, permanent damage can occur.

The LTC7899 is specified over the –40°C to 150°C operating junction temperature range. High junction

temperatures degrade operating lifetimes. Note the maximum ambient temperature consistent with these

specifications is determined by specific operating conditions in conjunction with the board layout, rated

package thermal impedance, and other environmental factors. The junction temperature (TJ, in °C) is

calculated from the ambient temperature (TA, in °C) and power dissipation (PD, in Watts) according to the

following formula: TJ = TA + (PD × θJA), where θJA is the package thermal impedance and equals 43°C/W for the 28-

lead (4mm × 5mm), quad flat no lead (QFN) package.

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