TPS54073PWPRG4 datasheet(10/25 Pages) TI1

Part #	TPS54073PWPRG4

Description	2.2 ??4 -V, 14-A SYNCHRONOUS BUCK CONVERTER WITH DISABLED SINKING DURING START-UP

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DESIGN PROCEDURE

DESIGN PARAMETERS

TPS54073

SLVS547 – FEBRUARY 2005 ............................................................................................................................................................................................ www.ti.com

Figure 12. Application Circuit, 3.3 V to 1.5 V

Figure

12

shows

the

schematic

for

a

typical

• Output voltage

TPS54073 application. The TPS54073 provides up to

• Input ripple voltage

14-A output current at a nominal output voltage of

• Output ripple voltage

1.5 V. Nominal input voltages are 3.3 V for PVIN, and

• Output current rating

3.3 V for VIN. For proper thermal performance, the

• Operating frequency

exposed PowerPAD underneath the device must be

soldered to the printed-circuit board.

For this design example, use the following as the

input parameters:

The following design procedure is used to select

component values for the TPS54073. Alternately, the

DESIGN PARAMETER

EXAMPLE VALUE

SWIFT Designer Software is used to generate a

Input voltage (VIN)

3.3 V

complete design. The SWIFT Designer Software uses

Input voltage range (PVIN)

2.2 to 3.5 V

an iterative design procedure and

accesses

a

Output voltage

1.5 V

comprehensive

database

of

components

when

generating

a

design.

This

section

presents

a

Input ripple voltage

350 mV

simplified discussion of the design process.

Output ripple voltage

20 mV

Output current rating

14 A

Operating frequency

700 kHz

To begin the design process, a few parameters must

be decided. The designer needs to know:

• Input voltage range

10

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