VIN

VOUT

PGOOD

IIN

u

u

D(INRUSH)

(IN)

(INRUSH)

P

0.5 V

I

VIN

VOUT

PGOOD

IIN

12

TPS1663

SLVSET9A – SEPTEMBER 2018 – REVISED OCTOBER 2018

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Product Folder Links: TPS1663

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Copyright © 2018, Texas Instruments Incorporated

Feature Description (continued)

Figure 3. Hot Plug In and Inrush Current Control at 24-V Input

8.3.3.1 Thermal Regulation Loop

The power dissipation during power up can be calculated using Equation 3.

(3)

System designs requiring to charge large output capacitors rapidly or powering up an off board load may result in

this time then the internal FET is turned OFF. Subsequent operation of the device depends on the MODE

configuration (Auto-Retry or latch OFF). This scheme ensures fast and reliable power up operation. Figure 4

illustrates performance of the device operating in thermal regulation loop during charging of a large output

capacitor.

The Thermal regulation loop gets disabled internally after the power up when the internal FET gets fully

Figure 4. Thermal Regulation Loop Response During Power up with Large Capacitive Load