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PTB48560A, PTB48560B

PTB48560C

SLTS236A–MARCH 2005–REVISED OCTOBER 2005

TERMINAL FUNCTIONS

TERMINAL

DESCRIPTION

NAME

NO.

1

this input is connected to the input source ground.

The negative input supply for the module, and the 0-V reference for the PEN and NEN enable inputs. When

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powering the module from a positive source, this input is connected to the input source return.

2

potential the converter output is disabled. This input must be open circuit for the converter to operate. The

converter then produces an output whenever a valid input source is applied.

potential to enable the converter. When the input is open circuit, the converter output is disabled. If the enable

3

whenever a valid input source is applied.

from the input power pins and produces a valid output voltage approximately 20 ms before the voltage at the

10

Track terminal is allowed to rise. This provides the required standby power source to any downstream nonisolated

modules in power-up sequencing applications.

This is a sequenced output voltage from the converter that is controlled by the Track terminal during power-up

transitions. It is only available to the PTB48560B, and used with the output voltage set to 3.3 V (an I/O supply

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output has reached regulation.

6

connected to the common of the load circuit.

This terminal is used in power-up sequencing applications to control the output voltage of Auto-Track compatible

Track

5

controlled by Auto-Track.

Provides the converter with a remote sense capability when used with +Sense. For optimum output voltage

–Sense

7

reference connection for both the output voltage set-point resistor and Track control.

A resistor must be connected between this terminal and -Sense to set the converter output voltage. A 0.05-W

rated resistor may be used, with tolerance and temperature stability of 1% and 100 ppm/°C, respectively. If left

8

open circuit, the converter output voltage defaults to its lowest value. The specification table gives the standard

resistor values for the most common output voltages.

+Sense

9

raised slightly. The +Sense input may be left open circuit, but connecting it to one of the output terminals improves

load regulation of that output.

(1) These functions indicate signals electrically common with the input.

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