1 Overview

To showcase how TPSM8A29 offers better transient performance than its fixed frequency counterpart (TPS543B20), both devices were set up using the same external components.

Table 1-1 Design Specifications

Initial Design	TPSM8A29	TPS543B20
Output Voltage	0.9 V	0.9 V
Switching Frequency	600 kHz	500 kHz
Input Capacitance	330-µF + 4 x 22-µF	330-µF + 4 x 22-µF
Inductor	0.6 µH (integrated)	0.6 µH
Output Capacitance	2 x 100-µF	2 x 100-µF
Load Transient	5 A - 13 A, at 4 A/µs step	5 A - 13 A, at 4 A/µs step
Transient Voltage pk-pk	84 mV	114 mV

One difference to note here is that the TPSM8A29 module switching frequency setting is 600 kHz and is measured at 614 kHz, whereas The TPS543B20 converter switching frequency setting is 500 kHz and is measured at 550 kHz.