TPS79301Q1,'79318Q1, '79325Q1

'79328Q1,'793285Q1,'79330Q1

TPS79333Q1,'793475Q1

SGLS162D − APRIL 2003 − REVISED SEPTEMBER 2007

www.ti.com

6

FUNCTIONAL BLOCK DIAGRAM—ADJUSTABLE VERSION

_

+

Thermal

Shutdown

Bandgap

Reference

VIN

Current

Sense

R2

VIN

GND

EN

VOUT

SHUTDOWN

Vref

UVLO

ILIM

External to

the Device

R1

UVLO

250 k

Ω

Bypass

FB

FUNCTIONAL BLOCK DIAGRAM—FIXED VERSION

_

+

Thermal

Shutdown

VIN

Current

Sense

R1

R2

VIN

GND

EN

VOUT

SHUTDOWN

Vref

UVLO

ILIM

Bandgap

Reference

UVLO

250 k

Ω

Bypass

Terminal Functions

TERMINAL

I/O

NAME

NO.

I/O

DESCRIPTION

NAME

ADJ

FIXED

I/O

DESCRIPTION

BYPASS

4

4

An external bypass capacitor connected to this terminal, in conjunction with an internal resistor, creates a

low-pass filter to further reduce regulator noise.

EN

3

3

I

EN is an input that enables or shuts down the device. When EN goes to a logic high, the device will be enabled.

When the device goes to a logic low, the device is in shutdown mode.

FB

5

N/A

I

Feedback input voltage for the adjustable device.

GND

2

2

Regulator ground

IN

1

1

I

Input to the device.

OUT

6

5

O

Regulated output of the device.