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PIN ASSIGNMENTS

FB

IOK

GND

PVIN

SW

VOUT

GND

VIN

EN

PGND

DRC Package

(TOP VIEW)

TPS61058

TPS61059

SLVS572B – APRIL 2005 – REVISED DECEMBER 2005

Terminal Functions

TERMINAL

I/O

DESCRIPTION

NAME

NO.

EN

1

I

This is the enable pin of the device. Connect this pin to ground forces the device into shutdown mode. Pulling

this pin above 1.4V enables the device. This pin has an internal pull-down resistor.

VOUT

2

O

This is the output of the dc-dc converter.

FB

3

I

This is the feedback pin of the device. The feedback pin measures the LED current through the sense

resistor. The feedback voltage is set internally to 500mV.

IOK

4

O

This pin indicates that the dc-dc converter is ready for high current operation (open drain output).

GND

5, 7

Control / logic ground.

PVIN

6

I

This is the input voltage pin of the device. Connect directly to the input bypass capacitor.

VIN

8

I

This pin needs to be tied to the input voltage pin of the device.

SW

9

I

This is the switching pin of the converter.

PGND

10

Power ground.

PowerPAD™

Must be soldered to achieve appropriate power dissipation. Should be connected to PGND.

4