LTC7899 datasheet(4/50 Pages) AD

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Data Sheet

LTC7899

analog.com

Rev. 0

4 of 50

SPECIFICATIONS

Table 1. Electrical Characteristics

(Specifications are for TJ = -40°C to +150°C for the minimum and maximum values, TA = 25°C for the typical

values, all voltages are with respect to VIN- unless otherwise noted. (GND to VIN-) = 12V, RUN = 5V, EXTVCC = INTVCC,

DRVSET = 0V, DRVUV = 0V, TGUP = TGDN = TGxx, BGUP = BGDN = BGxx, and DTCA and DTCB = 0V, unless

otherwise noted. )

PARAMETER

SYMBOL

CONDITIONS/COMMENTS

MIN

TYP

MAX

UNITS

Input Supply (VIN)

Bias Input Supply

Operating Range

VBIAS

135

Input Supply

Operating Range

|VIN−|

VBIAS ≥ 4V

135

Regulated Output

Voltage Set Point

VOUT

with respect to VIN-

1.2

135

Controller Operation

Regulated Feedback

Voltage with respect

to VIN− 2

VFBB

VBIAS = 4V to 135V, ITH Voltage = 0.6V

to 1.2V

1.188

1.2

1.212

Regulated Feedback

Voltage with respect

to SENSE+

VFBA

VBIAS = 4V to 135V,

ITH Voltage = 0.6V to 1.2V

-50

VFBB Feedback

Current2

VFBA = (VSENSE++100mV)

-50

+50

Feedback Overvoltage

Threshold

Relative to VFBB, TA = 25°C

Transconductance

Amplifier gm2

ITH = 1.2V, Sink and Source = 5μA

1.8

mmho

Maximum Current

Sense Threshold

VSENSE(MAX)

VFBB = 1.1V, SENSE+ = 12V

ILIM = 0V

ILIM = floating

ILIM = INTVCC

SENSE- Pin Current

ISENSE-

SENSE- = 3.3V, TA = 25°C

-1

μA

SENSE+ Pin Current

ISENSE+

SENSE+ < 3V

3.2V ≤ SENSE+ < INTVCC – 0.5V

SENSE+ > INTVCC + 0.5V

700

μA

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