LTC7899 datasheet(8/50 Pages) AD

8 / 50 page

Data Sheet

LTC7899

analog.com

Rev. 0

8 of 50

(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

PGOOD Delay for

Reporting a Fault

μs

This specification is not tested in production.

The LTC7899 is tested in a feedback loop that servos VITH to a specified voltage and measures the resultant VFBB.

Dynamic supply current is higher due to the gate charge being delivered at the switching frequency. See

Applications Information.

Rise and fall times are measured using 10% and 90% levels. Delay times are measured using 50% levels.

TGxx falling to BGxx rising and BGxx falling to TGxx rising delay times are measured at rising/falling thresholds

on TGxx and BGxx of approximately 1.5V. See Figure 37 and Figure 38 .

The minimum on-time condition specified for inductor peak-to-peak ripple current is >40% of the maximum

load current (IMAX) (see the Minimum On-Time Considerations section).

LTC7899 Datasheet(PDF) 8 Page - Analog Devices