MAX15015AATX+T

MAX15015AATX+T Datasheet

The combine a step-down DC-DC converter and a 50mA, low-quiescent-current low-dropout LDO regulator. The LDO regulator is ideal for powering always-on circuitry. The DC-DC converter input voltage range is 4.5V to 40V for the MAX15015/MAX15016, and 7.5V to 40V for the MAX15014/MAX15017.

Part	Datasheet
MAX15015AATX+T	MAX15015AATX+T (pdf)

Related Parts	Information
MAX15015AEVKIT+	MAX15015AEVKIT+
MAX15014AATX+T	MAX15014AATX+T
MAX15015BATX+T	MAX15015BATX+T
MAX15017BATX+T	MAX15017BATX+T
MAX15016AATX+T	MAX15016AATX+T

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EVALUATION KIT AVAILABLE 1A, 4.5V to 40V Input Buck Converters with 50mA Auxiliary LDO Regulators The combine a step-down DC-DC converter and a 50mA, low-quiescent-current low-dropout LDO regulator. The LDO regulator is ideal for powering always-on circuitry. The DC-DC converter input voltage range is 4.5V to 40V for the MAX15015/MAX15016, and 7.5V to 40V for the MAX15014/MAX15017. The DC-DC converter output is adjustable from 1.26V to 32V and can deliver up to 1A of load current. These devices utilize a feed-forward voltage-mode-control scheme for good noise immunity in the high-voltage switching environment and offer external compensation allowing for maximum flexibility with a wide selection of inductor values and capacitor types. The switching frequency is internally fixed at 135kHz and 500kHz, depending on the version chosen. Moreover, the switching frequency can be synchronized to an external clock signal through the SYNC input. Light-load efficiency is improved by automatically switching to a pulse-skip mode. The soft-start time is adjustable with an external capacitor. The DC-DC converter can be disabled independent of the LDO, thus reducing the quiescent current to 47uA typ . The LDO linear regulators operate from 5V to 40V and deliver a guaranteed 50mA load current. The devices feature a preset output voltage of 5V MAX1501_A or 3.3V MAX1501_B . Alternatively, the output voltage can be adjusted from 1.5V to 11V by using an external resistive divider. The LDO section also features a RESET output with adjustable timeout period. Protection features include cycle-by-cycle current limit, hiccup-mode output short-circuit protection, and thermal shutdown. All devices are available in a space-saving, high-power 2.86W , 36-pin TQFN package and are rated for operation over the -40°C to +125°C automotive temperature range. ●● Mobile Radios ●● Navigation Systems ●● Combined DC-DC Converters and Low-QuiescentCurrent LDO Regulators ●● 1A DC-DC Converters Operate from 4.5V to 40V MAX15015/MAX15016 or 7.5V to 40V MAX15014/MAX15017 ●● Switching Frequency of 135kHz MAX15014/MAX15016 or 500kHz MAX15015/MAX15017 ●● 50mA LDO Regulator Operates from 5V to 40V Independent of the DC-DC Converter ●● 47uA Quiescent Current with DC-DC Converter Off and LDO On ●● 6uA System Shutdown Current ●● Frequency Synchronization Input ●● Shutdown/Enable Inputs ●● Adjustable Soft-Start Time ●● Active-Low Open-Drain RESET Output with Programmable Timeout Delay ●● Thermal Shutdown and Output Short-Circuit Protection ●● Space-Saving 6mm x 6mm Thermally Enhanced 36-Pin TQFN Package Ordering Information PART TEMP RANGE PIN-PACKAGE MAX15014AATX+ -40°C to +125°C 36 TQFN-EP* MAX15014BATX+ -40°C to +125°C 36 TQFN-EP* MAX15015AATX+ -40°C to +125°C 36 TQFN-EP* MAX15015BATX+ -40°C to +125°C 36 TQFN-EP* MAX15016AATX+ -40°C to +125°C 36 TQFN-EP* MAX15016BATX+ -40°C to +125°C 36 TQFN-EP* MAX15017AATX+ -40°C to +125°C 36 TQFN-EP* MAX15017BATX+ -40°C to +125°C 36 TQFN-EP* +Denotes a lead Pb -free/RoHS-compliant package. *EP = Exposed pad. 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 +45V IN_LDO to +0.3V LX to VIN_SW + 0.3V LX to VIN_SW + 0.3V BST to VIN_SW + 12V BST to +12V PGND to +0.3V REG, DVREG, SYNC, RESET, CT to SGND........-0.3V to +12V FB, COMP_SW, SS to SGND.................-0.3V to VREG + 0.3V SET_LDO, LDO_OUT to SGND............................-0.3V to +12V C+ to PGND MAX15015/MAX15016 only ............. VDVREG - 0.3V to 12V C- to PGND MAX15015/MAX15016 only ......... -0.3V to VDVREG + 0.3V LDO_OUT Output Limited Switch DC Current DRAIN and LX pins combined TJ = TJ = RESET Sink Continuous Power Dissipation TA = +70°C 36-Pin TQFN derate 26.3mW/°C above +70°C Single-Layer 36-Pin TQFN derate 35.7mW/°C above +70°C Multilayer Operating Temperature Range.......................... -40°C to +125°C Maximum Junction Storage Temperature Range............................. -60°C to +150°C Lead Temperature soldering, 10s .................................. +300°C 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 VIN_SW = VIN_LDO = VDRAIN = 14V, VEN_SYS = VEN_SW = 2.4V, VREG = VDVREG, VSYNC = VSET_LDO = VSGND = VPGND = 0V, CREG = 1uF, CIN_SW = 0.1uF, CIN_LDO = 0.1uF, CLDO_OUT = 10uF, CDRAIN = 0.22uF, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1 PARAMETER System Supply Current Not Switching Switching System Supply Current LDO Quiescent Current System Shutdown Current System Enable Voltage System Enable Hysteresis System Enable Input Current BUCK CONVERTER Input Voltage Range CONDITIONS ISYS No load VFB = 1.3V, MAX15014/MAX15017 VFB = 1.3V, MAX15015/MAX15016 No load VFB = 0V, MAX15014/ MAX15017 Initial release No /V OPNs in Ordering Information deleted automotive reference in Applications section update Packaging Information PAGES CHANGED 1, 25 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance. Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2014 Maxim Integrated Products, Inc. 25

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EVALUATION KIT AVAILABLE
1A, 4.5V to 40V Input Buck Converters with 50mA Auxiliary LDO Regulators

The combine a step-down DC-DC converter and a 50mA, low-quiescent-current low-dropout LDO regulator. The LDO regulator is ideal for powering always-on circuitry. The DC-DC converter input voltage range is 4.5V to 40V for the MAX15015/MAX15016, and 7.5V to 40V for the MAX15014/MAX15017.

The DC-DC converter output is adjustable from 1.26V to 32V and can deliver up to 1A of load current. These devices utilize a feed-forward voltage-mode-control scheme for good noise immunity in the high-voltage switching environment and offer external compensation allowing for maximum flexibility with a wide selection of inductor values and capacitor types. The switching frequency is internally fixed at 135kHz and 500kHz, depending on the version chosen. Moreover, the switching frequency can be synchronized to an external clock signal through the SYNC input. Light-load efficiency is improved by automatically switching to a pulse-skip mode. The soft-start time is adjustable with an external capacitor. The DC-DC converter can be disabled independent of the LDO, thus reducing the quiescent current to 47uA typ .

The LDO linear regulators operate from 5V to 40V and deliver a guaranteed 50mA load current. The devices feature a preset output voltage of 5V MAX1501_A or 3.3V MAX1501_B . Alternatively, the output voltage can be adjusted from 1.5V to 11V by using an external resistive divider. The LDO section also features a RESET output with adjustable timeout period.

Protection features include cycle-by-cycle current limit, hiccup-mode output short-circuit protection, and thermal shutdown. All devices are available in a space-saving, high-power 2.86W , 36-pin TQFN package and are rated for operation over the -40°C to +125°C automotive temperature range.
●● Mobile Radios ●● Navigation Systems
●● Combined DC-DC Converters and Low-QuiescentCurrent LDO Regulators
●● 1A DC-DC Converters Operate from 4.5V to 40V MAX15015/MAX15016 or 7.5V to 40V MAX15014/MAX15017
●● Switching Frequency of 135kHz MAX15014/MAX15016 or 500kHz MAX15015/MAX15017
●● 50mA LDO Regulator Operates from 5V to 40V Independent of the DC-DC Converter
●● 47uA Quiescent Current with DC-DC Converter Off and LDO On
●● 6uA System Shutdown Current
●● Frequency Synchronization Input
●● Shutdown/Enable Inputs
●● Adjustable Soft-Start Time
●● Active-Low Open-Drain RESET Output with Programmable Timeout Delay
●● Thermal Shutdown and Output Short-Circuit Protection
●● Space-Saving 6mm x 6mm Thermally Enhanced 36-Pin TQFN Package
Ordering Information

PART

TEMP RANGE PIN-PACKAGE

MAX15014AATX+
-40°C to +125°C 36 TQFN-EP*

MAX15014BATX+
-40°C to +125°C 36 TQFN-EP*

MAX15015AATX+
-40°C to +125°C 36 TQFN-EP*

MAX15015BATX+
-40°C to +125°C 36 TQFN-EP*

MAX15016AATX+
-40°C to +125°C 36 TQFN-EP*

MAX15016BATX+
-40°C to +125°C 36 TQFN-EP*

MAX15017AATX+
-40°C to +125°C 36 TQFN-EP*

MAX15017BATX+
-40°C to +125°C 36 TQFN-EP*
+Denotes a lead Pb -free/RoHS-compliant package. *EP = Exposed pad.
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 +45V

IN_LDO to +0.3V LX to VIN_SW + 0.3V LX to VIN_SW + 0.3V BST to VIN_SW + 12V BST to +12V PGND to +0.3V REG, DVREG, SYNC, RESET, CT to SGND........-0.3V to +12V FB, COMP_SW, SS to SGND.................-0.3V to VREG + 0.3V SET_LDO, LDO_OUT to SGND............................-0.3V to +12V C+ to PGND

MAX15015/MAX15016 only ............. VDVREG - 0.3V to 12V C- to PGND

MAX15015/MAX15016 only ......... -0.3V to VDVREG + 0.3V

LDO_OUT Output Limited Switch DC Current DRAIN and LX pins combined TJ = TJ = RESET Sink Continuous Power Dissipation TA = +70°C
36-Pin TQFN derate 26.3mW/°C above +70°C Single-Layer 36-Pin TQFN derate 35.7mW/°C above +70°C Multilayer Operating Temperature Range.......................... -40°C to +125°C Maximum Junction Storage Temperature Range............................. -60°C to +150°C Lead Temperature soldering, 10s .................................. +300°C

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

VIN_SW = VIN_LDO = VDRAIN = 14V, VEN_SYS = VEN_SW = 2.4V, VREG = VDVREG, VSYNC = VSET_LDO = VSGND = VPGND = 0V, CREG = 1uF, CIN_SW = 0.1uF, CIN_LDO = 0.1uF, CLDO_OUT = 10uF, CDRAIN = 0.22uF, TA = TJ = -40°C to +125°C, unless otherwise noted. Typical values are at TA = +25°C. Note 1

PARAMETER System Supply Current Not Switching

Switching System Supply Current

LDO Quiescent Current System Shutdown Current System Enable Voltage System Enable Hysteresis System Enable Input Current BUCK CONVERTER Input Voltage Range

CONDITIONS

ISYS

No load

VFB = 1.3V, MAX15014/MAX15017

VFB = 1.3V, MAX15015/MAX15016

No load

VFB = 0V, MAX15014/ MAX15017
Initial release No /V OPNs in Ordering Information deleted automotive reference in Applications section update Packaging Information

PAGES CHANGED
1, 25
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim Integrated’s website at

Maxim Integrated cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim Integrated product. No circuit patent licenses are implied. Maxim Integrated reserves the right to change the circuitry and specifications without notice at any time. The parametric values min and max limits shown in the Electrical Characteristics table are guaranteed. Other parametric values quoted in this data sheet are provided for guidance.

Maxim Integrated and the Maxim Integrated logo are trademarks of Maxim Integrated Products, Inc. 2014 Maxim Integrated Products, Inc. 25

Notice: we do not provide any warranties that information, datasheets, application notes, circuit diagrams, or software stored on this website are up-to-date or error free. The archived MAX15015AATX+T Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX15015AATX+T 647234