MAX15014_07 Datasheet, PDF (3/26 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
ELECTRICAL 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, T_A = T_J = -40°C to +125°C, unless otherwise noted.
Typical values are at T_A = +25°C.) (Note 1)
PARAMETER
SYMBOL
CONDITIONS
MIN TYP MAX UNITS
Undervoltage Lockout Threshold
UVLO_TH
V_{IN_SW} and IN_LDO rising,
MAX15014/MAX15017
V_{IN_SW} and IN_LDO rising,
MAX15015/MAX15016
6.7
7.0
7.4
V
3.90 4.08 4.25
Undervoltage Lockout
Hysteresis
MAX15014/MAX15017
UVLO_{HYST MAX15015/MAX15016}
0.54
V
0.3
Output Voltage Range
V_OUT
Minimum output
Maximum output
1.26
V
32
Output Current
I_OUT
1
A
EN_SW Input Voltage Threshold ^{VEN_SWH EN_SW = high, switching power supply is on}
2.4
V_{EN_SWL} EN_SW = low, switching power supply is off
V
0.8
EN_SW Hysteresis
220
mV
Switching Enable Input Current
I_{EN_SW}
INTERNAL VOLTAGE REGULATOR
V_{EN_SW} = 2.4V
V_{EN_SW} = 14V
0.5
2
µA
0.6
2
Output Voltage
V_REG
MAX15014/MAX15017, V_{IN_SW} = 9V to 40V
MAX15015/MAX15016,
V_{IN_SW} = 5.5V to 40V
7.6
4.75
8.4
V
5.25
Line Regulation
Load Regulation
V_{IN_SW} = 9.0V to 40V, MAX15014/MAX15017
V_{IN_SW} = 5.5V to 40V, MAX15015/MAX15016
I_REG = 0 to 20mA
1
mV/V
1
0.25
V
Dropout Voltage
OSCILLATOR
Frequency Range
V_{IN_SW} = 7.5V (MAX15014/MAX15017),
V_{IN_SW} = 4.5V (MAX15015/MAX15016),
I_REG = 20mA
f_CLK
V_SYNC = 0V, MAX15014/MAX15016
V_SYNC = 0V, MAX15015/MAX15017
V_SYNC = 0V, V_{IN_SW} = 7.5V, MAX15014
(135kHz)
0.5
V
122
136
150
kHz
425
500
575
90
98
Maximum Duty Cycle
V_SYNC = 0V, V_{IN_SW} = 4.5V, MAX15016
(135kHz)
90
D_MAX
V_SYNC = 0V, V_{IN_SW} = 4.5V, MAX15015
90
(500kHz)
98
%
96
Minimum LX Low Time
SYNC High-Level Voltage
SYNC Low-Level Voltage
V_SYNC = 0V, V_{IN_SW} = 7.5V, MAX15017
(500kHz)
90
V_SYNC = 0V
94
2.2
98
ns
V
0.8
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