Datasheet

SLUU111 – June 2002
10
1-MHz, 3.3-V, High-Efficiency Synchronous Buck Converter With TPS43000 PWM Controller
3.3 Output Ripple Voltage and Transient Response
The output ripple is approximately 28.8 mV peak-to-peak with a 1.5 A output and is shown
in Figure 4. Figure 5 shows load changes from 0.5 A to 1.5 A, where the overshooting voltage
is approximately 10 mV.
Figure 5. Output Ripple
I
OUT
= 5 A
t – Time – 500 ns / div
V
OUT(ac)
(10 mV/div)
Figure 6. Transient Response
V
OUT
(10 mV/div)
I
OUT
(1 A/div)
t – Time – 500 µs / div
4 PCB Layout
Figures 7 through 9 show the PCB layout . All components are on the top side of the board.
The bottom side of the board is the ground plane.
Figure 7. Parts Placement