
MP2365 – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER
MP2365 Rev. 0.91
7/10/2006
www.MonolithicPower.com
4
MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited.
2006 MPS. All Rights Reserved.
ELECTRICAL CHARACTERISTICS
V
IN
= 12V, C1 = 10μF, C2 = 47μF, L = 4.7μH and T
A
= +25
°
C, unless otherwise noted.
Steady State Operation
V
OUT
= 1.8V, I
OUT
= 1.5A
V
OUT
= 1.8V, I
OUT
= 3A
8.0
7.5
7.0
6.5
6.0
5.5
5.0
P
0
20
DUTY CYCLE (%)
40
60
80
Peak Current vs
Duty Cycle
V
10V/div.
V
OUT
AC Coupled
20mV/div.
I
INDUCTOR
400ns/div.
400ns/div.
Steady State Operation
4ms/div.
Startup Through Enable
V
OUT
= 3.3V, I
= 1.5A (Resistance Load)
4ms/div.
Startup Through Enable
V
OUT
= 3.3V, I
= 3A (Resistance Load)
Shutdown Through Enable
V
OUT
= 3.3V, I
= 1.5A (Resistance Load)
Shutdown Through Enable
V
OUT
= 3.3V, I
= 3A (Resistance Load)
V
AC Coupled
50mV/div.
I
INDUCTOR
I
1A/div.
V
10V/div.
V
OUT
AC Coupled
20mV/div.
I
INDUCTOR
V
1V/div.
V
EN
5V/div.
I
INDUCTOR
V
10V/div.
V
1V/div.
V
EN
5V/div.
I
INDUCTOR
V
SW
10V/div.
V
OUT
1V/div.
V
5V/div.
I
INDUCTOR
V
10V/div.
V
OUT
1V/div.
V
5V/div.
I
INDUCTOR
V
10V/div.