Background
1-2
1.1
Background
The TPS54350 dc/dc converter is designed to provide up to 3-A output from
a nominal 12-V (6-V to 18-V) input voltage source. Rated input voltage and
output current range is given in Table 1−1. This evaluation module is designed
to demonstrate the small PCB areas that may be achieved when designing
with the TPS54350 regulator and does not reflect the high efficiencies that may
be achieved when designing with this part. The switching frequency is set at
a nominal 500 kHz, allowing the use of a relatively small footprint 10-
µ
H output
inductor. The high-side MOSFET is incorporated inside the TPS54350
package along with gate drive circuitry for an external synchronous FET. The
low drain-to-source on resistance of the MOSFET allows the TPS54350 to
achieve high efficiencies and helps to keep the junction temperature low at
high output currents. The compensation components are provided external to
the IC, and allow for an adjustable output voltage and a customizable loop
response. The TPS54350 is a full featured device including programmable
undervoltage lockout, bidirectional synchronization, adjustable switching
frequency, enable and power good functions.
Table 1−1. Input Voltage and Output Current Summary
EVM
INPUT VOLTAGE
RANGE
†
OUTPUT CURRENT
RANGE
TPS54350EVM−235
6 to 18 V
0 to 3 A
† Operation assured to 4.0 V after initial start up.