Rainbow Electronics MAX726 - Manual (Page 8)

MAX724/MAX726
5A/2A Step-Down, PWM,
Switch-Mode DC-DC Regulators
8 _______________________________________________________________________________________
CONTINUOUS-CURRENT MODE (I OUT = 3A)
0
-0.5
V D
I P = 3.4A
I SW
0
0
I P = 3.4A
I AVG = I OUT = 3A
0
I P = 3.4A
I AVG = 2.1A
I D
DISCONTINUOUS-CURRENT MODE
(I OUT = 0.16A)
V SW VOLTAGE (TO GND)
(ALSO DIODE VOLTAGE)
5V/div
I P = 0.5A
SWITCH CURRENT
1A/div
INDUCTOR CURRENT
1A/div
DIODE CURRENT
1A/div
I L
Figure 3. MAX724 Step-Down Converter Waveforms with V
IN
= 20V, L = 50µH (all waveforms 2µs/div)