www.ti.com

DEVICE INFORMATION

FUNCTIONAL BLOCK DIAGRAMS

Thermal

Shutdown

UVLO

Current

Limit

2

µA

Overshoot

Detect

500k

Quickstart

1.193V

Bandgap

IN

EN

NR

OUT

GND

400

Ω

Thermal

Shutdown

UVLO

Current

Limit

3.3M

Ω

Overshoot

Detect

500k

1.193V

Bandgap

IN

EN

FB

OUT

GND

400

Ω

TPS79901, TPS79915, TPS79916, TPS79918

TPS79925, TPS79927, TPS79928, TPS799285

TPS79929, TPS79930, TPS79932, TPS79933

SBVS056C – JANUARY 2005 – REVISED MAY 2005

Figure 1. Fixed Voltage Versions

Figure 2. Adjustable Voltage Versions

Table 1. PIN DESCRIPTIONS

TPS799xx

DESCRIPTION

NAME

DDC

YZU

IN

1

C3

Input supply.

GND

2

B2

Ground

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

EN

3

A1

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

Fixed voltage versions only; connecting an external capacitor to this pin bypasses noise generated

NR

4

A3

by the internal bandgap. This allows output noise to be reduced to very low levels.

Adjustable version only; this is the input to the control loop error amplifier, and is used to set the

FB

4

A3

output voltage of the device.

Output of the regulator. A small capacitor (total typical capacitance

≥ 2.0µF ceramic) is needed from

OUT

5

C1

this pin to ground to assure stability.

5