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