5A/2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
CONTINUOUS-CURRENT MODE (IOUT = 3A)
VD
0
-0.5
IP = 3.4A
ISW
0
IP = 3.4A
0
IL
IAVG = IOUT = 3A
IP = 3.4A
ID
0
IAVG = 2.1A
DISCONTINUOUS-CURRENT MODE
(IOUT = 0.16A)
VSW VOLTAGE (TO GND)
(ALSO DIODE VOLTAGE)
5V/div
SWITCH CURRENT
1A/div
IP = 0.5A
INDUCTOR CURRENT
1A/div
DIODE CURRENT
1A/div
Figure 3. MAX724 Step-Down Converter Waveforms with VIN = 20V, L = 50µH (all waveforms 2µs/div)
8 _______________________________________________________________________________________