33730_10 Datasheet, PDF(14/26 Page) Freescale Semiconductor, Inc – Switch Mode Power Supply with Multiple Linear Regulators

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33730_10 Datasheet, PDF (14/26 Pages) Freescale Semiconductor, Inc – Switch Mode Power Supply with Multiple Linear Regulators

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FUNCTIONAL DESCRIPTION

FUNCTIONAL INTERNAL BLOCK DESCRIPTION

RESET CIRCUITRY

There are four open drain reset lines that indicate the

status of the four voltage outputs; VDDH, VDDL, VDD3, and

VKAM. They are labeled: RSTH, RSTL, RST3, and

RSTKAM.

REGON INPUT

This input is ORâd with VIGN. However, it is a 5.0 volt logic

input, as opposed to VIGN, which is a VBAT level input. This

input is controlled by an MCU I/O pin, to hold power up when

the ignition switch is turned off, so housekeeping functions

can be performed before power is shut off, by lowering the

REGON line. IF REGON is not needed, it should be tied to

GND.

33730

Analog Integrated Circuit Device Data

Freescale Semiconductor

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