33730 datasheet(4/27 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33730

PIN CONNECTIONS

Logic Input

Programming Pin 2

Programming pin 2 for the VDD3, VDDL, VKAM reference voltages.

PFD

Analog

Output

Protection FET Drive

Reverse battery protection FET gate drive.

BOOT

Analog Input

Bootstrap

This pin is connected to the bootstrap capacitor.

Analog Input

Slew-rate

Slew-rate Control of the switching regulator.

21,22

Power Output

Switch Node

These pins are the source of the internal power switch (N-channel

MOSFET).

23,24

VBAT

Power Input

Battery Voltage

Supply

Voltage supply to the IC (external reverse battery protection needed in

some applications).

KA_VBAT

Power Input

Keep Alive Supply

This pin is the keep alive supply input.

Analog

Output

Charge Pump

External capacitor reservoir of the internal charge pump.

VKAM

Power Output

Keep Alive Memory

Keep Alive Memory (standby) supply output.

VDD3

Analog Input VDD3 Linear Regulator This is a VDD3 regulator output feedback pin.

This pin is also the output of the VDD3 standby regulator.

VDD3_B

Analog

Output

VDD3 Linear

Regulator Base Drive

This pin can be used also as an additional standby regulator without the

external pass transistor.

GND

Ground

This pin is a ground.

VIGN

Analog Input

Voltage Ignition

This pin is the ignition switch control input pin. It contains an internal

protection diode.

Logic Input

Programming Pin 3

Programming pin 3 for the VDD3, VDDL, and VKAM reference voltages.

Table 1. 33730 Pin Definitions(continued)

A functional description of each pin can be found in the Functional Pin Description section beginning on page 12.

Pin Number

Pin Name

Pin Function

Formal Name

Definition

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