MP2144 – 2A, 5.5V, 1.2MHz. 40μA IQ, SYNCHRONOUS STEP-DOWN SWITCHER
.TYPICAL PERFORMANCE CHARACTERISTICS (continued)
VIN = 5V, VOUT = 1.2V, L = 1.0µH, COUT=22µF, TA = 25°C, unless otherwise noted.
EN Start Up without Load
EN Start Up with 2A Load
EN Shut Down without Load
Power Good On with 2A Load
Load Transient Response
V
V
OUT
OUT
V
500mV/div.
OUT
500mV/div.
500mV/div.
V
EN
2.00V/div.
V
V
EN
EN
2.00V/div.
2.00V/div.
V
V
V
SW
SW
SW
5.00V/div.
5.00V/div.
5.00V/div.
I
L
I
L
I
L
1.00A/div.
2.00A/div.
2.00A/div.
EN Shut Down with 2A Load
Power Good On without Load
V
OUT
1.00V/div.
V
OUT
V
OUT
500mV/div.
500mV/div.
V
PG
V
PG
5.00V/div.
5.00V/div.
V
V
EN
SW
2.00V/div.
5.00V/div.
V
V
SW
SW
5.00V/div.
2.00V/div.
I
L
1.00A/div.
I
L
I
L
2.00A/div.
2.00A/div.
Power Good Off without Load Power Good Off with 2A Load
V
OUT
1.00V/div.
V
OUT
V
20.0mV/div.
OUT
500mV/div.
V
PG
V
PG
5.00V/div.
5.00V/div.
V
SW
V
5.00V/div.
V
SW
SW
5.00V/div.
5.00V/div.
I
L
I
L
1.00A/div.
I
L
2.00A/div.
2.00A/div.
MP2144 Rev. 1.03
12/20/2012
www.MonolithicPower.com
MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
6
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