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1A, 4.5V to 40V Input Buck Converters with
50mA Auxiliary LDO Regulators
ABSOLUTE MAXIMUM RATINGS
IN_SW, IN_LDO, DRAIN, EN_SYS, EN_SW
to SGND ..............................................................-0.3V to +45V
IN_LDO to IN_SW ..................................................-0.3V to +0.3V
LX to SGND ...........................................-0.3V to (V IN_SW + 0.3V)
LX to PGND ...........................................-0.3V to (V IN_SW + 0.3V)
BST to SGND ..........................................-0.3V to (V IN_SW + 12V)
BST to LX................................................................-0.3V to +12V
PGND to SGND .....................................................-0.3V to +0.3V
REG, DVREG, SYNC, RESET , CT to SGND............-0.3V to +12V
FB, COMP_SW, SS to SGND....................-0.3V to (V REG + 0.3V)
SET_LDO, LDO_OUT to SGND ..............................-0.3V to +12V
C+ to PGND
(MAX15015/MAX15016 only)................(V DVREG - 0.3V) to 12V
C- to PGND
LDO_OUT Output Current.................................Internally Limited
Switch DC Current (DRAIN and LX pins combined)
T J = +125°C.......................................................................1.9A
T J = +150°C.....................................................................1.25A
RESET Sink Current ..............................................................5mA
Continuous Power Dissipation (T A = +70°C)
36-Pin TQFN (derate 26.3mW/°C above +70°C)
Single-Layer Board .....................................................2105mW
36-Pin TQFN (derate 35.7mW/°C above +70°C)
Multilayer Board ..........................................................2857mW
Operating Temperature Range .........................-40°C to +125°C
Maximum Junction Temperature .....................................+150°C
Storage Temperature Range ............................-60°C to +150°C
Lead Temperature (soldering, 10s) ................................+300°C
(MAX15015/MAX15016 only) ............-0.3V to (V DVREG + 0.3V)
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to
absolute maximum rating conditions for extended periods may affect device reliability.
ELECTRICAL CHARACTERISTICS
(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
System Supply Current (Not
Switching)
I SYS
No load
V FB = 1.3V,
MAX15014/MAX15017
V FB = 1.3V,
MAX15015/MAX15016
0.7
0.85
1.8
1.8
mA
V FB = 0V,
MAX15014/MAX15017
5.6
Switching System Supply Current
I SW
No load
V FB = 0V,
MAX15015/MAX15016
8.6
mA
LDO Quiescent Current
I LDO
V EN_SYS = 14V,
V EN_SW = 0V
I LDO_OUT = 100μA
I LDO_OUT = 50mA
47
130
63
200
μA
System Shutdown Current
System Enable Voltage
I SHDN
V EN_SYSH
V EN_SYSL
V EN_SYS = 0V, V EN_SW = 0V
EN_SYS = high, system on
EN_SYS = low, system off
2.4
6
10
0.8
μA
V
System Enable Hysteresis
220
mV
System Enable Input Current
I EN_SYS
V EN_SYS = 2.4V
V EN_SYS = 14V
0.5
0.6
2
2
μA
BUCK CONVERTER
Input Voltage Range
V IN_SW
MAX15014/MAX15017
MAX15015/MAX15016
7.5
4.5
40.0
40.0
V
2
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MAX15017AATX+T
功能描述:直流/直流开关转换器 1A 4.5-40V Input Buck Converters RoHS:否 制造商:STMicroelectronics 最大输入电压:4.5 V 开关频率:1.5 MHz 输出电压:4.6 V 输出电流:250 mA 输出端数量:2 最大工作温度:+ 85 C 安装风格:SMD/SMT
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