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_

+

Thermal

Shutdown

Bandgap

Reference

1.225 V

Current

Sense

IN

GND

EN

OUT

SHUTDOWN

UVLO

ILIM

External to

the Device

FB

UVLO

250 k

Ω

(1) Not Available on DCQ (SOT223) options.

Quickstart

_

+

Thermal

Shutdown

Current

Sense

IN

GND

EN

OUT

SHUTDOWN

UVLO

ILIM

Bandgap

Reference

1.225 V

UVLO

250 k

Ω

NR

Quickstart

TPS794xx

SLVS349E – NOVEMBER 2001 – REVISED DECEMBER 2005

FUNCTIONAL BLOCK DIAGRAM—ADJUSTABLE VERSION

FUNCTIONAL BLOCK DIAGRAM—FIXED VERSION

Terminal Functions

TERMINAL

DESCRIPTION

DGN

DCQ

NAME

(MSOP)

(SOT223)

Connecting an external capacitor to this pin bypasses noise generated by the internal bandgap, which

NR

4

5

improves power-supply rejection and reduces output noise.

The EN terminal is an input that enables or shuts down the device. When EN is a logic high, the device

EN

6

1

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

FB

3

5

Feedback input voltage for the adjustable device.

GND

5, PAD

3, 6

Regulator ground

IN

8

2

Unregulated input to the device.

NC

2, 7

No internal connection.

OUT

1

4

Regulator output

4

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