MP1494 – SYNCHRONOUS STEP-DOWN CONVERTER
MP1494 Rev. 1.04 www.MonolithicPower.com 4
12/26/2012 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited.
© 2012 MPS. All Rights Reserved.
TYPICAL PERFORMANCE CHARACTERISTICS
Performance waveforms are tested on the evaluation board of the Design Example section.
V
IN
= 12V, V
OUT
= 3.3V, AAM=0.5V, T
A
= 25°C, unless otherwise noted.
0
3
6
9
12
15
18
0 0.5 1 1.5 2
500
505
510
515
520
525
530
535
540
4 6 8 10 12 14 16 18
INPUT VOLTAGE(V) OUTPUT CURRENT (A)
2.5
2.8
3.1
3.4
3.7
4
4.3
25 30 35 40 45 50 55 60 65 70 75
-1.0
-0.5
0.0
0.5
1.0
4 6 8 10121416
-0.20
-0.15
-0.10
-0.05
0.00
0.05
0.10
0.15
0.20
0 0.2 0.4 0.6 0.8 1.0 1.2 1.4 1.6 1.8 2
70
75
80
85
90
95
100
70
75
80
85
90
95
100
00.511.52 00.511.52
Load Regulation
V
IN
=4.5V-16V, I
OUT
=0A-2A
Peak Current
vs. Duty Cycle
Disabled Supply Current
vs. Input Voltage
V
IN
=6V-16V, I
OUT
=0A
Enabled Supply Current
vs. Input Voltage
V
IN
=6V-16V, I
OUT
=0A
Line Regulation
V
IN
=5V-16V
Case Temperature Rise
vs. Output Current
I
OUT
=0A-2A
V
IN
=5V
V
IN
=12V
V
IN
=16V
LOAD CURRENT (A) LOAD CURRENT (A)
V
IN
=5V
V
IN
=12V
V
IN
=12V
V
IN
=16V
V
IN
=16V
I
OUT
=0A
I
OUT
=1A
I
OUT
=2A
V
IN
=4.5V
OUTPUT CURRENT (A)
INPUT VOLTAGE(V)
PEAK CURRENT (A)
-30
-20
-10
0
10
20
30
40
50
4 6 8 10 12 14 16 18
INPUT VOLTAGE(V)
INPUT CURRENT (nA)
