www.ti.com

_

+

Thermal

Shutdown

Bandgap

Reference

1.225 V

Current

Sense

GND

EN

SHUTDOWN

UVLO

ILIM

External to

the Device

FB

UVLO

250 k

Ω

Quickstart

IN

OUT

_

+

Thermal

Shutdown

Current

Sense

GND

EN

SHUTDOWN

UVLO

ILIM

Bandgap

Reference

1.225 V

UVLO

250 k

Ω

NR

Quickstart

IN

OUT

TPS79601, TPS79618, TPS79625

TPS79628, TPS79630, TPS79633

SLVS351D – SEPTEMBER 2002 – REVISED OCTOBER 2004

FUNCTIONAL BLOCK DIAGRAM—ADJUSTABLE VERSION

FUNCTIONAL BLOCK DIAGRAM—FIXED VERSION

Table 1. Terminal Functions

TERMINAL

DESCRIPTION

NAME

ADJ

FIXED

NR

N/A

5

Connecting an external capacitor to this pin bypasses noise generated by the internal bandgap. This improves

power-supply rejection and reduces output noise.

EN

1

1

Driving the enable pin (EN) high turns on the regulator. Driving this pin low puts the regulator into shutdown

mode. EN can be connected to IN if not used.

FB

5

N/A

This terminal is the feedback input voltage for the adjustable device.

GND

3, Tab

3, Tab

Regulator ground

IN

2

2

Unregulated input to the device.

OUT

4

4

Output of the regulator.

5