13892 datasheet(84/158 Pages) FREESCALE

84 / 158 page

FUNCTIONAL DEVICE OPERATION

SUPPLIES

Analog Integrated Circuit Device Data



Freescale Semiconductor

MC13892

• Short-circuit protection (SCP) is included on certain LDOs (see the SCP section later in this chapter). Exceeding the SCP

threshold will disable the regulator and generate a system interrupt. The output voltage will not sag below the specified voltage

for the rated current being drawn. For the lower current LDOs without SCP, they are less accessible to the user environment

and essentially self-limiting.

• The power tree of a given application must be scrubbed for critical use cases to ensure consistency and robustness in the

power strategy.

TRANSIENT RESPONSE WAVEFORMS

The transient load and line response are specified with the waveforms as depicted in Figure 25. Note that the transient load

response refers to the overshoot only, excluding the DC shift itself. The transient line response refers to the sum of both overshoot

and DC shift. This is also valid for the mode transition response.

Figure 25. Transient Waveforms

SHORT-CIRCUIT PROTECTION

The higher current LDOs and those most accessible in product applications include short-circuit detection and protection

(VVIDEO, VAUDIO, VCAM, VSD, VGEN1, VGEN2, and VGEN3). The short-circuit protection (SCP) system includes debounced

fault condition detection, regulator shutdown, and processor interrupt generation, to contain failures and minimize chance of

13892 Datasheet(PDF) 84 Page - Freescale Semiconductor, Inc