MAX15014_07 Datasheet, PDF (8/26 Pages) Maxim Integrated Products – 1A, 4.5V to 40V Input Buck Converters with 50mA Auxiliary LDO Regulators

1A, 4.5V to 40V Input Buck Converters with
50mA Auxiliary LDO Regulators
Typical Operating Characteristics (continued)
(V_{IN_SW} = V_{IN_LDO} = V_DRAIN =14V, V_{EN_SYS} = V_{EN_SW} = 2.4V, V_REG = V_DVREG, V_SYNC = V_{SET_LDO} = V_SGND = V_PGND = 0V, C_REG =
1µF, C_{IN_SW} = 0.1µF, C_{IN_LDO} = 0.1µF, C_{LDO_OUT} = 10µF, C_DRAIN = 0.22µF, see Figures 6 and 7, T_A = +25°C, unless otherwise noted.)
TURN-ON/-OFF WAVEFORM
INCREASING V_IN
MAX15014 toc10
I_LOAD = 1A
V_IN
5V/div
TURN-ON/-OFF WAVEFORM
INCREASING V_IN
MAX15014 toc11
I_LOAD = 100mA
V_IN
5V/div
0V
0V
V_OUT
2V/div
V_OUT
2V/div
0V
0V
10ms/div
10ms/div
OUTPUT VOLTAGE vs. TEMPERATURE
3.40
3.38
3.36
3.34
3.32
3.30
I_LOAD = 0A
3.28
3.26
3.24
3.22
I_LOAD = 1A
3.20
-40 -15
10 35 60 85
TEMPERATURE (°C)
110 135
EFFICIENCY vs. LOAD CURRENT
100
V_OUT = 3.3V
90
80 ^{VIN = 4.5V}
V_IN = 7.5V
70
60
V_IN = 12V
50
V_IN = 24V
40
30
V_IN = 40V
20
10
0
1
MAX15016A
I_{LDO_OUT} = 0A
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(MAX15015A)
100
V_OUT = 3.3V
90
V_IN = 7.5V
V_IN = 4.5V
80
70
60
V_IN = 12V
50
V_IN = 24V
40
30
V_IN = 40V
20
10
0
1
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(MAX15014)
100
V_OUT = 5V
90
80 VIN = 7.5V
70
60
V_IN = 24V
50
V_IN = 12V
40
30
V_IN = 40V
20
10
0
1
10
100
1000
LOAD CURRENT (mA)
EFFICIENCY vs. LOAD CURRENT
(MAX15017A)
100
90 ^{VOUT = 5V}
80 ^VIN ^{= 7.5V}
70
60
V_IN = 24V
50
V_IN = 12V
40
30
V_IN = 40V
20
10
0
1
10
100
1000
LOAD CURRENT (mA)
LOAD-TRANSIENT RESPONSE
MAX15014 toc17
V_IN = 12V, I_OUT = 0.25A TO 1A
MAX15015A
V_OUT
AC-COUPLED
100mV/div
LOAD-TRANSIENT RESPONSE
MAX15014 toc18
V_IN = 4.5V, I_OUT = 0.25A TO 1A
MAX15015A
V_OUT
AC-COUPLED
100mV/div
I_LOAD
500mA/div
0
I_LOAD
500mA/div
200µs/div
0
200µs/div
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