Texas Instruments TPS54373EVM-237, User Manual, Page: 10 / 36

Background
1-2
1.1 Background
The TPS54373EVM-237 evaluation module uses the TPS54373 synchronous
buck regulator with disabled sink during start-up (DSDS) to provide an output
voltage of from 0.9 V to 2.5 V from a nominal 3.3-V input or 0.9 V to 3.3 V for
a nominal 5-V input. 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 are achieved when designing with the TPS54373 regulator. The
switching frequency is set at a nominal 700 kHz, allowing the use of a small
footprint 1.0-
µ
H output inductor. The MOSFETs of the TPS54373 are
incorporated inside the TPS54373 package. This eliminates the need for
external MOSFETs and their associated drivers. The low drain-to-source on
resistance of the MOSFETs gives the TPS54373 high efficiency 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 disabled sink during start-up
(DSDS) feature allows the TPS54373 regulator to be used in applications
where it is necessary to prebias the output to maintain a specified difference
between I/O and core voltages during start-up.
Table 1–1. Input Voltage and Output Current Summary
EVM Input Voltage Range Output Current Range
TPS54373EVM-237 3.0 V to 6.0 V –3 A to 3 A