Datasheet

TPS40305/HPA488SwitchingWaveforms
Vin=14V,Vout=1.8V,Iout=10 A
-60
-40
-20
0
20
40
60
80
100
0.1 1 10 100 1000
f-Frequency-kHz
-135
-90
-45
0
45
90
135
180
225
Gain
Phase
Gain-dB
TPS40305EVM-488 Test Data www.ti.com
6.4 Switch Node
V
IN
= 12V, V
OUT
= 1.8V, I
OUT
= 10A
Ch1: TP12 (HDRV), Ch2:13 TP (SW), Ch3: TP14 (LDRV)
Figure 8. TPS40305EVM-488 Switching Waveforms
6.5 Control Loop Bode Diagram
V
IN
= 14V, V
OUT
= 1.8V, I
OUT
= 10A, Bandwidth: 83kHz, Phase Margin: 55°
Figure 9. TPS40305EVM-488 Gain and Phase vs. Frequency
12
TPS40305EVM-488 SLUU406–February 2010
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