MP1482 – 2A, 18V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER
TYPICAL PERFORMANCE CHARACTERISTICS
V
IN
= 12V, V
O
= 3.3V, L = 10µH, C1 = 10µF, C2 = 22µF, T
A
= +25°C, unless otherwise noted.
Steady State Test
V
IN
= 12V, V
OUT
= 3.3V
I
OUT
= 0A, I
IN
= 8.2mA
V
IN
20mV/div.
V
OUT
20mV/div.
I
L
1A/div.
V
EN
5V/div.
V
OUT
1V/div.
I
L
1A/div.
V
SW
10V/div.
Startup through Enable
V
IN
= 12V, V
OUT
= 3.3V
I
OUT
= 1A (Resistance Load)
V
EN
5V/div.
V
OUT
2V/div.
I
L
1A/div.
V
SW
10V/div.
Shutdown through Enable
V
IN
= 12V, V
OUT
= 3.3V
I
OUT
= 1A (Resistance Load)
V
SW
10V/div.
Heavy Load Operation
2A Load
V
IN, AC
200mV/div.
V
O, AC
20mV/div.
I
L
1A/div.
V
SW
10V/div.
V
IN, AC
200mV/div.
V
O, AC
20mV/div.
I
L
1A/div.
Medium Load Operation
1A Load
V
IN, AC
20mV/div.
Light Load Operation
No Load
V
O, AC
20mV/div.
I
L
1A/div.
V
SW
10V/div.
V
SW
10V/div.
Short Circuit
Protection
Short Circuit
Recovery
Load Transient
V
OUT
2V/div.
V
OUT
2V/div.
V
OUT
200mV/div.
I
L
2A/div.
I
L
1A/div.
I
L
2A/div.
I
LOAD
1A/div.
MP1482 Rev. 1.31
www.MonolithicPower.com
7/9/2012
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
5
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