Current

Sense

Thermal

Shutdown

UVLO

UVLO

R

1

FB

R

2

External to

the Device

Overshoot

Detect

250 k

Ω

Quickstart

Bandgap

Reference

1.225 V

IN

V

IN

EN

GND

OUT

300

Ω

V

REF

ILIM

SHUTDOWN

Current

Sense

Thermal

Shutdown

UVLO

UVLO

R

1

R

2

R

Overshoot

Detect

250 k

Ω

Quickstart

Bandgap

Reference

1.225 V

IN

V

IN

EN

GND

NR

OUT

300

Ω

V

REF

ILIM

SHUTDOWN

TPS786xx

www.ti.com

SLVS389L – SEPTEMBER 2002 – REVISED OCTOBER 2010

FUNCTIONAL BLOCK DIAGRAM—ADJUSTABLE VERSION

FUNCTIONAL BLOCK DIAGRAM—FIXED VERSION

PIN CONFIGURATIONS

TERMINAL

DCQ

KTT

DRB

NAME

(SOT223)

(DDPAK)

(SON)

DESCRIPTION

Noise-reduction pin for fixed versions only. An external bypass capacitor, connected to this terminal, in

NR

5

5

5

conjunction with an internal resistor, creates a low-pass filter to further reduce regulator noise.

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

EN

1

1

8

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

FB

5

5

5

Feedback input voltage for the adjustable device.

GND

3, 6

3, TAB

6

Regulator ground

IN

2

2

1, 2

Input supply

OUT

4

4

3, 4

Regulator output

Copyright © 2002–2010, Texas Instruments Incorporated

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