MAX15041_10 Datasheet, PDF (4/18 Pages) Maxim Integrated Products – Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches

Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
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.)
EFFICIENCY vs. LOAD CURRENT
100
95 ^VIN ^{= 12V}
90
85
80
75
V_OUT = 5.0V
V_OUT = 3.3V
70
V_OUT = 2.5V
65
V_OUT = 1.8V
60
V_OUT = 1.2V
55
50
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
LOAD-TRANSIENT WAVEFORMS
MAX15041 toc04
200µs/div
I_LOAD
2A/div
V_OUT
AC-COUPLED
200mV/div
V_PGOOD
5V/div
EFFICIENCY vs. LOAD CURRENT
100
95 ^VIN ^{= 5V}
90
85
80
75
70
V_OUT = 3.3V
65
V_OUT = 2.5V
60
V_OUT = 1.8V
55
V_OUT = 1.2V
50
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
1.002
1.001
I_LOAD = 0A
1.000
0.999
0.998
0.997
0.996
0.995
-40 -15
10
35
60
85
TEMPERATURE (NC)
OUTPUT-VOLTAGE REGULATION
vs. LOAD CURRENT
0.2
0
-0.2
-0.4
-0.6
-0.8
-1.0
-1.2
0
0.5 1.0 1.5 2.0 2.5 3.0
LOAD CURRENT (A)
NORMALIZED OUTPUT VOLTAGE
vs. TEMPERATURE
1.004
I_LOAD = 2A
1.002
1.000
0.998
0.996
0.994
0.992
-40 -15
10
35
60
85
TEMPERATURE (NC)
FB SET POINT vs.TEMPERATURE
610
SWITCHING FREQUENCY
vs. INPUT VOLTAGE
385
375
608
365
606
355
604
345
T_A = +85NC
335
T_A = +25NC
602
T_A = -40NC
325
600
-40 -15
10
35
60
85
TEMPERATURE (NC)
315
0
5 10 15 20 25
INPUT VOLTAGE (V)
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