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.