Typical operating characteristics – Rainbow Electronics MAX15041 User Manual
Page 4
MAX15041
Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
4
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EFFICIENCY vs. LOAD CURRENT
MAX15041 toc01
LOAD CURRENT (A)
EFFICIENCY (%)
2.5
2.0
1.5
1.0
0.5
55
60
65
70
75
80
85
90
95
100
50
0
3.0
V
OUT
= 5.0V
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 12V
EFFICIENCY vs. LOAD CURRENT
MAX15041 toc02
LOAD CURRENT (A)
EFFICIENCY (%)
2.5
2.0
1.5
1.0
0.5
55
60
65
70
75
80
85
90
95
100
50
0
3.0
V
OUT
= 3.3V
V
OUT
= 2.5V
V
OUT
= 1.8V
V
OUT
= 1.2V
V
IN
= 5V
OUTPUT-VOLTAGE REGULATION
vs. LOAD CURRENT
MAX15041 toc03
LOAD CURRENT (A)
OUTPUT-VOLTAGE REGULATION (%)
2.5
2.0
1.5
1.0
0.5
-1.0
-0.8
-0.6
-0.4
-0.2
0
0.2
-1.2
0
3.0
LOAD-TRANSIENT WAVEFORMS
MAX15041 toc04
V
OUT
AC-COUPLED
200mV/div
I
LOAD
2A/div
V
PGOOD
5V/div
200µs/div
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
TEMPERATURE (NC)
NORMALIZED OUTPUT VOLTAGE
60
35
10
-15
0.996
0.997
0.998
0.999
1.000
1.001
1.002
0.995
-40
85
MAX15041 toc05
I
LOAD
= 0A
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
MAX15041 toc06
TEMPERATURE (NC)
NORMALIZED OUTPUT VOLTAGE
60
35
10
-15
0.994
0.996
0.998
1.000
1.002
1.004
0.992
-40
85
I
LOAD
= 2A
Typical Operating Characteristics
(V
IN
= 12V, V
OUT
= 3.3V, C
VDD
= 1µF, C
IN
= 22µF, T
A
= +25°C, circuit of Figure 3 (see Table 1 for values), unless otherwise specified.)
FB SET POINT vs.TEMPERATURE
MAX15041 toc07
TEMPERATURE (NC)
FB SET POINT (mV)
60
35
10
-15
602
604
606
608
610
600
-40
85
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
MAX15041 toc08
INPUT VOLTAGE (V)
FREQUENCY (kHz)
325
335
345
355
365
375
385
315
25
20
15
10
5
0
T
A
= +85NC
T
A
= +25NC
T
A
= -40NC