Datasheet

8 5
1 4
Exposed Thermal Pad
2,40
1,65
3,10
2,65
TPS54428
SLVSB42B –NOVEMBER 2011–REVISED MARCH 2013 www.ti.com
VREG5 Capacitor Selection
A 1-µF ceramic capacitor must be connected between the VREG5 to GND pin for proper operation. It is
recommended to use a ceramic capacitor
THERMAL INFORMATION
This 8-pin DDA package incorporates an exposed thermal pad that is designed to be directly to an external
heatsink. The thermal pad must be soldered directly to the printed board (PCB). After soldering, the PCB can be
used as a heatsink. In addition, through the use of thermal vias, the thermal pad can be attached directly to the
appropriate copper plane shown in the electrical schematic for the device, or alternatively, can be attached to a
special heartsink structure designed into the PCB. This design optimizes the heat transfer from the integrated
circuit (IC).
For additional information on the exposed thermal pad and how to use the advantage of its heat dissipating
abilities, refer to Technical Brief, PowerPAD™ Thermally Enhanced Package, Texas Instruments Literature No.
SLMA002 and Application Brief, PowerPAD™ Made Easy, Texas Instruments Literature No. SLMA004.
The exposed thermal pad dimensions for this package are shown in Figure 16.
Figure 16. Thermal Pad Dimensions
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