FEATURES

• Two 45-mΩ (typical) MOSFETs for High

Efficiency at 3-A Loads

• 300kHz to 2MHz Switching Frequency

• 0.8 V ± 3.0% Voltage Reference Over

Temperature (0°C to 85°C)

• Synchronizes to External Clock

• Adjustable Slow Start/Sequencing

• UV and OV Power Good Output

• –40°C to 150°C Operating Junction

Temperature Range

• Thermally Enhanced 3mm × 3mm 16-pin QFN

• Pin Compatible to TPS54318

APPLICATIONS

• Low-Voltage, High-Density Power Systems

• Point-of-Load Regulation for Consumer

Applications such as Set Top Boxes, LCD

Displays, CPE Equipment

DESCRIPTION

The TPS54319 device is a full featured 6 V, 3 A,

synchronous step down current mode converter with

two integrated MOSFETs.

The TPS54319 enables small designs by integrating

the MOSFETs, implementing current mode control to

reduce external component count, reducing inductor

size by enabling up to 2 MHz switching frequency,

and minimizing the IC footprint with a small 3mm x

3mm thermally enhanced QFN package.

The TPS54319 provides accurate regulation for a

variety of loads with an accurate ±3.0% Voltage

Reference (VREF) over temperature.

Efficiency is maximized through the integrated 45mΩ

MOSFETs and 360mA typical supply current. Using

the enable pin, shutdown supply current is reduced to

2 μA by entering a shutdown mode.

Under voltage lockout is internally set at 2.6 V, but

can be increased by programming the threshold with

a resistor network on the enable pin. The output

voltage startup ramp is controlled by the slow start

pin. An open drain power good signal indicates the

output is within 93% to 107% of its nominal voltage.

Frequency fold back and thermal shutdown protects

the device during an over-current condition.

The TPS54319 is supported in the SwitcherPro™

Software Tool at www.ti.com/switcherpro.

For more SWIFTTM documentation, see the TI

website at www.ti.com/swift.