MAX15014_07 Datasheet, PDF (9/26 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.)
LX VOLTAGE AND INDUCTOR CURRENT
MAX15014 toc19
MAX150_ _
V_LX
5V/div
0V
LX VOLTAGE AND INDUCTOR CURRENT
MAX15014 toc20
V_LX
5V/div
0V
INDUCTOR CURRENT
0V
200mA/div
I_LOAD = 40mA
2µs/div
LX VOLTAGE AND INDUCTOR CURRENT
MAX15014 toc21
V_LX
5V/div
0V
2µs/div
INDUCTOR CURRENT
500mA/div
I_LOAD = 1A
2µs/div
INDUCTOR CURRENT
100mA/div
I_LOAD = 160mA
MINIMUM LX PULSE WIDTH
vs. LOAD CURRENT
400
350
300
250
200
150
100
50
V_OUT = 3.3V
0
300 400 500 600 700 800 900 1000
LOAD CURRENT (mA)
LDO QUIESCENT CURRENT
vs. TEMPERATURE
70
60
I_LOAD = 100µA
50
40
30
NO LOAD
20
10
0
-50 -25
MAX15015B
0 25 50 75 100 125
TEMPERATURE (°C)
OUTPUT VOLTAGE
vs. TEMPERATURE
5.10
5.05
I_LOAD = 1mA
5.00
I_LOAD = 10mA
4.95
I_LOAD = 50mA
4.90
4.85
-40 -15
MAX15015A
10 35 60 85 110 135
TEMPERATURE (°C)
OUTPUT VOLTAGE
vs. TEMPERATURE
3.31
I_LOAD = 1mA
3.30
3.29
3.28
I_LOAD = 10mA
3.27
3.26
3.25
I_LOAD = 50mA
3.24
MAX15015B
3.23
-40 -15 10 35 60 85 110 135
TEMPERATURE (°C)
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