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PIN ASSIGNMENT

PTH04070W

SLTS227B – SEPTEMBER 2004 – REVISED OCTOBER 2007

TERMINAL FUNCTIONS

TERMINAL

I/O

DESCRIPTION

NAME

NO.

VI

1

I

The positive input voltage power node to the module, which is referenced to common GND.

This is the common ground connection for the VI and VO power connections. It is also the 0 VDC

GND

2

reference for the Inhibit and VO Adjust control inputs.

VO

3

O

The regulated positive power output with respect to the GND node.

A 1% resistor must be connected between this pin and GND (pin 1) to set the output voltage of the

module higher than 0.9 V. If left open-circuit, the output voltage defaults to this value. The temperature

VOAdjust

4

I

stability of the resistor should be 100 ppm/

°C (or better). The set-point range is from 0.9 V to 3.6 V. The

electrical specification table gives the standard resistor value for a number of common output voltages.

Refer to the application information for further guidance.

The Inhibit pin is an open-collector/drain-negative logic input that is referenced to GND. Applying a

low-level ground signal to this input disables the module's output. When the Inhibit control is active, the

Inhibit

5

I

input current drawn by the regulator is significantly reduced. If the Inhibit pin is left open-circuit, the

module will produce an output voltage whenever a valid input source is applied.

4

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