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FUNCTIONAL BLOCK DIAGRAMS

ADJUSTABLE VERSION

_

+

Thermal

Shutdown

Bandgap

Reference

1.22V

Current

Sense

R2

GND

EN

SHUTDOWN

UVLO

ILIM

External to

the Device

R1

UVLO

2.45V

250 k

Ω

NR

FB

59 k

QuickStart

OUT

IN

IN

FIXED VERSION

_

+

Thermal

Shutdown

Current

Sense

R1

R2

GND

EN

SHUTDOWN

UVLO

ILIM

250 k

Ω

NR

QuickStart

Bandgap

Reference

1.22V

UVLO

2.45V

R2 = 40 k

Ω

IN

IN

OUT

TPS793xx

SLVS348K – JULY 2001 – REVISED OCTOBER 2007

Table 1. Terminal Functions

TERMINAL

SOT23

SOT23

WCSP

NAME

ADJ

FIXED

FIXED

DESCRIPTION

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

NR

4

4

B2

This improves power-supply rejection and reduces output noise.

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

EN

3

3

A3

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

FB

5

N/A

N/A

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

GND

2

2

A1

Regulator ground

IN

1

1

C3

Input to the device.

OUT

6

5

C1

Output of the regulator.

4

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