13892 datasheet(34/161 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

13892

FUNCTIONAL DESCRIPTION

FUNCTIONAL PIN DESCRIPTION

SWITCHERS

SW1IN, SW2IN, SW3IN AND SW4IN

Switchers 1, 2, 3, and 4 input. Connect these pins to BP to supply Switchers 1, 2, 3, and 4.

SW1FB, SW2FB, SW3FB AND SW4FB

Switchers 1, 2, 3, and 4 feedback. Switchers 1, 2, 3, and 4 output voltage sense respectively. Connect these pins to the farther

point of each of their respective SWxOUT pin, in order to sense and maintain voltage stability.

SW1OUT

Switcher 1 output. Buck switcher for processor core(s).

GNDSW1

Ground for Switcher 1.

SW2OUT

Switcher 2 output. Buck switcher for processor SOG, etc.

GNDSW2

Ground for Switcher 2.

SW3OUT

Switcher 3 output. Buck switcher for internal processor memory and peripherals.

GNDSW3

Ground for switcher 3.

SW4OUT

Switcher 4 output. Buck switcher for external memory and peripherals.

GNDSW4

Ground for switcher 4.

DVS1 AND DVS2

Switcher 1 and 2 DVS input pins. Provided for pin controlled DVS on the buck switchers targeted for processor core supplies.

The DVS pins may be reconfigured for Switcher Increment / Decrement (SID) mode control. When transitioning from one voltage

to another, the output voltage slope is controlled in steps of 25 mV per time step. These pins must be set high in order for the

DVS feature to be enabled for each of switchers 1 or 2, or low to disable it.

SWBSTIN

Switcher BST input. The 2.2

μH switcher BST inductor must be connected here.

SWBSTOUT

Power supply for gate driver for the internal power NMOS that charges SWBST inductor. It must be connected to BP.

SWBSTFB

Switcher BST feedback. When SWBST is configured to supply the UVBUS pin in OTG mode the feedback will be switched to

sense the UVBUS pin instead of the SWBSTFB pin.

GNDSWBST

Ground for switcher BST.

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