Buck Switching Phases
Synchronous buck converter: where the inductor current flows in each part of the switching period.
V
IN
12 V
V
OUT
5 V
f
SW
1 MHz
L
4.7 µH
R
ON-H
100 mΩ
R
ON-L
70 mΩ
V
D
0.5 V
t
D
30 ns
High-side on
Dead time 1 · body diode
Low-side on
Dead time 2 · body diode
Full cycle
3 A load
0.15 A load
Pause
Speed
+
−
V
IN
C
IN
SW
L 4.7 µH
V
OUT
C
OUT
R
LOAD
HG
Q1
LG
Q2
Q1 OFF
D1 off
Q2 OFF
D2 off
Phase
—
I
L
—
V
SW
—
Path
—
Switch-node waveforms, two periods
Click a region to jump to it · dead times widened and near-0 V levels exaggerated for visibility