33730 datasheet(3/27 Pages) FREESCALE

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Analog Integrated Circuit Device Data

Freescale Semiconductor

33730

PIN CONNECTIONS

Figure 3. 33730 Pin Connections

Table 1. 33730 Pin Definitions

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

HRT

Analog

Output

Hardware Reset Timer This pin is the hardware reset timer programmed with an external resistor.

RSTKAM

Open Drain

VKAM Reset

This pin is an open drain reset output, monitoring the VKAM supply to the

microprocessor.

RSTH

Open Drain

VDDH Reset

This pin is an open drain reset output, monitoring the VDDH regulator.

RSTL

Open Drain

VDDL Reset

This pin is an open drain reset output, monitoring the VDDL regulator.

RST3

Open Drain

VDD3 Reset

This pin is an open drain reset output, monitoring the VDD3 regulator.

VREF2

Power Output

VREF Output 2

This pin is the output of the protected supply VREF2. The pin is supplied

from the VDDH through the protection FET.

VDDL

Analog Input

VDDL Regulator

This pin is the VDDL regulator output feedback pin.

VDDH

Analog/

Power Input

VDDH Regulator

This pin is the 5.0V output feedback pin of the buck regulator. The pin is

also a power input for the protected outputs VREF1,2.

VDDL_B

Analog

Output

VDDL Regulator Base

Drive

VDDL linear regulator base drive.

VREF1

Power Output

VREF Output 1

This pin is the output of the protected supply VREF1. The pin is supplied

from the VDDH through the protection FET.

REGON

Logic Input

Regulator Hold On

Regulator Hold On input pin.

IGN_ON

Open Drain

VIGN Status

This open drain output signals the status of the VIGN pin.

VCOMP

Analog

Output

Compensation

This pin provides switching pre-regulator compensation, it is the output of

the error amplifier.

INV

Analog Input

Inverting Input

Inverting input of the switching regulator error amplifier.

FREQ

Analog Input Frequency Adjustment Frequency adjustment of the switching regulator. The value of the resistor

to ground at this pin determines the oscillator frequency.

Logic Input

Programming Pin 1

Programming pin 1 for the VDD3, VDDL, and VKAM reference voltages.

Note: The exposed pad is electrically and thermally connected to the IC ground.

HRT

RSTKAM

RSTH

RSTL

RST3

VREF2

VDDL

VDDH

VDDL_B

VREF1

REGON

IGN_ON

VCOMP

INV

FREQ

VIGN

GND

VDD3_B

VDD3

VKAM

KA_VBAT

VBAT

BOOT

PFD

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