TPS73033DBVR datasheet(21/43 Pages) TI2

21 / 43 page

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IOUT

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Figure 7-6. TPS730 Load Transient Response

7.3 Best Design Practices

Do place at least one, low-ESR, 2.2-μF capacitor as close as possible between the OUT pin of the regulator and

the GND pin.

Do place at least one, low-ESR, 0.1-μF capacitor as close as possible between the IN pin of the regulator and

the GND pin.

Do provide adequate thermal paths away from the device.

Do not place the input or output capacitor more than 10 mm away from the regulator.

Do not exceed the absolute maximum ratings.

Do not float the Enable (EN) pin.

Do not resistively or inductively load the NR pin.

Do not let the output voltage get more than 0.3 V above the input voltage.

7.4 Power Supply Recommendations

These devices are designed to operate from an input voltage supply range from 2.7 V to 5.5 V. The input voltage

range must provide adequate headroom in order for the device to have a regulated output. This input supply

must be well-regulated and stable. A 0.1-µF input capacitor is required for stability; if the input supply is noisy,

additional input capacitors with low ESR can help improve the output noise performance.

7.5 Layout

7.5.1 Layout Guidelines

Layout is a critical part of good power-supply design. There are several signal paths that conduct fast-changing

currents or voltages that can interact with stray inductance or parasitic capacitance to generate noise or degrade

the power-supply performance. To help eliminate these problems, the IN pin should be bypassed to ground with

a low ESR ceramic bypass capacitor with an X5R or X7R dielectric.

Equivalent series inductance (ESL) and equivalent series resistance (ESR) must be minimized to maximize

performance and ensure stability. Every capacitor (CIN, COUT, CNR/SS, CFF) must be placed as close as possible

to the device and on the same side of the PCB as the regulator itself.

Do not place any of the capacitors on the opposite side of the PCB from where the regulator is installed. The

use of vias and long traces is strongly discouraged because these circuits may impact system performance

negatively, and even cause instability.

www.ti.com

TPS730

SBVS054K – NOVEMBER 2004 – REVISED JUNE 2025

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