MAX15041AETE+

MAX15041AETE+ Datasheet

MAX15041

Part	Datasheet
MAX15041AETE+	MAX15041AETE+ (pdf)

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MAX15041 Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches The MAX15041 low-cost, synchronous DC-DC converter with internal switches delivers an output current up to 3A. The MAX15041 operates from an input voltage of 4.5V to 28V and provides an adjustable output voltage from 0.6V to 90% of VIN, set with two external resistors. The MAX15041 is ideal for distributed power systems, preregulation, set-top boxes, television, and other consumer applications. The MAX15041 features a peak-current-mode PWM controller with internally fixed 350kHz switching frequency and a 90% maximum duty cycle. The current-mode control architecture simplifies compensation design, and ensures a cycle-by-cycle current limit and fast response to line and load transients. A high-gain transconductance error amplifier allows flexibility in setting the external compensation by using a type II compensation scheme, thereby allowing the use of all ceramic capacitors. This synchronous buck regulator features internal MOSFETs that provide better efficiency than asynchronous solutions, while simplifying the design relative to discrete controller solutions. In addition to simplifying the design, the integrated MOSFETs minimize EMI, reduce board space, and provide higher reliability by minimizing the number of external components. The MAX15041 also features thermal shutdown and overcurrent protection high-side sourcing and low-side sinking , and an internal 5V LDO with undervoltage lockout. In addition, this device ensures safe startup when powering into a prebiased output. Other features include an externally adjustable soft-start that gradually ramps up the output voltage and reduces inrush current. Independent enable control and powergood signals allow for flexible power sequencing. The MAX15041 is available in a space-saving, highpower, 3mm x 3mm, 16-pin TQFN-EP package and is fully specified from -40°C to +85°C. Distributed Power Systems Wall Adapters Preregulators Set-Top Boxes Televisions xDSL Modems Consumer Products o Up to 3A of Continuous Output Current o ±1% Output Accuracy Over Temperature o 4.5V to 28V Input Voltage Range o Adjustable Output Voltage Range from 0.606V to x VIN o Internal RDS-ON High-Side and RDS-ON Low-Side Power Switches o Fixed 350kHz Switching Frequency o Up to 93% Efficiency o Cycle-By-Cycle Overcurrent Protection o Programmable Soft-Start o Stable with Low-ESR Ceramic Output Capacitors o Safe Startup into Prebiased Output o Enable Input and Power-Good Output o Fully Protected Against Overcurrent and Overtemperature o VDD LDO Undervoltage Lockout o Space-Saving, Thermally Enhanced, 3mm x 3mm Package Ordering Information PART TEMP RANGE PINPACKAGE TOP MARK MAX15041ETE+ -40°C to +85°C 16 TQFN-EP* AGV +Denotes a lead Pb -free/RoHS-compliant package. *EP = Exposed pad. Typical Operating Circuit INPUT 12V PGOOD MAX15041 LX VDD PGND PGOOD SS FB COMP SGND OUTPUT 1.8V AT 3A Maxim Integrated Products 1 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches MAX15041 ABSOLUTE MAXIMUM RATINGS IN to +30V EN to SGND to VIN + 0.3V LX to PGND ................................-0.3V to min +30V, VIN + 0.3V LX to PGND .....................-1V to min +30V, VIN + 0.3V for 50ns PGOOD to SGND to +6V VDD to +6V COMP, FB, SS to SGND..............-0.3V to min +6V, VDD + 0.3V BST to LX to +6V BST to SGND to +36V SGND to PGND to +0.3V LX Current Note 1 to +8A Converter Output Short-Circuit Duration ...................Continuous Power Dissipation TA = +70°C 16-Pin TQFN derate 14.7mW/°C above +70°C Multilayer Board Operating Temperature Range ..........................-40°C to +85°C Junction Temperature Storage Temperature Range ............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C Soldering Temperature reflow Note 1 LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care not to exceed the IC’s package power dissipation. 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. PACKAGE THERMAL CHARACTERISTICS Note 2 16 TQFN-EP Junction-to-Ambient Thermal Resistance Junction-to-Case Thermal Resistance ...............+7°C/W Note 2 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to ELECTRICAL CHARACTERISTICS VIN = 12V, CVDD = 1µF, CIN = 22µF, TA = TJ = -40°C to +85°C, typical values are at TA = +25°C, unless otherwise noted. Note 3 PARAMETER CONDITIONS MIN TYP MAX UNITS STEP-DOWN CONVERTER Input-Voltage Range Quiescent Current Not switching Shutdown Input Supply Current ENABLE INPUT VEN = 0V, VDD regulated by internal LDO VEN = 0V, VIN = VDD = 5V EN Shutdown Threshold Voltage EN Shutdown Voltage Hysteresis EN Lockout Threshold Voltage EN Input Current POWER-GOOD OUTPUT VEN_SHDN VEN rising VEN_HYST VEN_LOCK VEN rising VEN_LOCK_HYST VEN = 2.9V PGOOD Threshold PGOOD Threshold Hysteresis PGOOD Output Low Voltage PGOOD Leakage Current ERROR AMPLIFIER VPGOOD_TH VPGOOD_HYST VPGOOD_OL IPGOOD VFB rising IPGOOD = 5mA, VFB = 0.5V VPGOOD = 5V, VFB = 0.7V

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MAX15041

Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches

The MAX15041 low-cost, synchronous DC-DC converter with internal switches delivers an output current up to 3A. The MAX15041 operates from an input voltage of 4.5V to 28V and provides an adjustable output voltage from 0.6V to 90% of VIN, set with two external resistors. The MAX15041 is ideal for distributed power systems, preregulation, set-top boxes, television, and other consumer applications.

The MAX15041 features a peak-current-mode PWM controller with internally fixed 350kHz switching frequency and a 90% maximum duty cycle. The current-mode control architecture simplifies compensation design, and ensures a cycle-by-cycle current limit and fast response to line and load transients. A high-gain transconductance error amplifier allows flexibility in setting the external compensation by using a type II compensation scheme, thereby allowing the use of all ceramic capacitors.

This synchronous buck regulator features internal MOSFETs that provide better efficiency than asynchronous solutions, while simplifying the design relative to discrete controller solutions. In addition to simplifying the design, the integrated MOSFETs minimize EMI, reduce board space, and provide higher reliability by minimizing the number of external components.

The MAX15041 also features thermal shutdown and overcurrent protection high-side sourcing and low-side sinking , and an internal 5V LDO with undervoltage lockout. In addition, this device ensures safe startup when powering into a prebiased output.

Other features include an externally adjustable soft-start that gradually ramps up the output voltage and reduces inrush current. Independent enable control and powergood signals allow for flexible power sequencing.

The MAX15041 is available in a space-saving, highpower, 3mm x 3mm, 16-pin TQFN-EP package and is fully specified from -40°C to +85°C.

Distributed Power Systems

Wall Adapters

Preregulators

Set-Top Boxes

Televisions
xDSL Modems

Consumer Products
o Up to 3A of Continuous Output Current
o ±1% Output Accuracy Over Temperature
o 4.5V to 28V Input Voltage Range
o Adjustable Output Voltage Range from 0.606V to x VIN
o Internal RDS-ON High-Side and RDS-ON Low-Side Power Switches
o Fixed 350kHz Switching Frequency
o Up to 93% Efficiency
o Cycle-By-Cycle Overcurrent Protection
o Programmable Soft-Start
o Stable with Low-ESR Ceramic Output Capacitors
o Safe Startup into Prebiased Output
o Enable Input and Power-Good Output
o Fully Protected Against Overcurrent and Overtemperature
o VDD LDO Undervoltage Lockout o Space-Saving, Thermally Enhanced, 3mm x 3mm

Package
Ordering Information

PART

TEMP RANGE

PINPACKAGE

TOP MARK

MAX15041ETE+ -40°C to +85°C 16 TQFN-EP* AGV
+Denotes a lead Pb -free/RoHS-compliant package. *EP = Exposed pad.

Typical Operating Circuit

INPUT 12V

PGOOD

MAX15041 LX VDD

PGND

PGOOD SS

FB COMP

SGND

OUTPUT 1.8V AT 3A

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

Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches

MAX15041

ABSOLUTE MAXIMUM RATINGS

IN to +30V

EN to SGND to VIN + 0.3V LX to PGND ................................-0.3V to min +30V, VIN + 0.3V LX to PGND .....................-1V to min +30V, VIN + 0.3V for 50ns PGOOD to SGND to +6V

VDD to +6V COMP, FB, SS to SGND..............-0.3V to min +6V, VDD + 0.3V BST to LX to +6V

BST to SGND to +36V

SGND to PGND to +0.3V

LX Current Note 1 to +8A Converter Output Short-Circuit Duration ...................Continuous Power Dissipation TA = +70°C
16-Pin TQFN derate 14.7mW/°C above +70°C Multilayer Board Operating Temperature Range ..........................-40°C to +85°C Junction Temperature Storage Temperature Range ............................-65°C to +150°C Lead Temperature soldering, 10s .................................+300°C Soldering Temperature reflow

Note 1 LX has internal clamp diodes to PGND and IN. Applications that forward bias these diodes should take care not to exceed the IC’s package power dissipation.

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.

PACKAGE THERMAL CHARACTERISTICS Note 2
16 TQFN-EP

Junction-to-Ambient Thermal Resistance Junction-to-Case Thermal Resistance ...............+7°C/W

Note 2 Package thermal resistances were obtained using the method described in JEDEC specification JESD51-7, using a fourlayer board. For detailed information on package thermal considerations, refer to

ELECTRICAL CHARACTERISTICS

VIN = 12V, CVDD = 1µF, CIN = 22µF, TA = TJ = -40°C to +85°C, typical values are at TA = +25°C, unless otherwise noted. Note 3

PARAMETER

CONDITIONS

MIN TYP MAX UNITS

STEP-DOWN CONVERTER

Input-Voltage Range Quiescent Current

Not switching

Shutdown Input Supply Current ENABLE INPUT

VEN = 0V, VDD regulated by internal LDO

VEN = 0V, VIN = VDD = 5V

EN Shutdown Threshold Voltage EN Shutdown Voltage Hysteresis

EN Lockout Threshold Voltage

EN Input Current POWER-GOOD OUTPUT

VEN_SHDN VEN rising

VEN_HYST

VEN_LOCK VEN rising

VEN_LOCK_HYST

VEN = 2.9V

PGOOD Threshold PGOOD Threshold Hysteresis PGOOD Output Low Voltage PGOOD Leakage Current ERROR AMPLIFIER

VPGOOD_TH VPGOOD_HYST VPGOOD_OL

IPGOOD

VFB rising

IPGOOD = 5mA, VFB = 0.5V VPGOOD = 5V, VFB = 0.7V

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Datasheet ID: MAX15041AETE+ 647237