MAX15041EVKIT+

Manufacturer Part NumberMAX15041EVKIT+
DescriptionKIT EVAL MAX15041ETE
ManufacturerMaxim Integrated Products
TypeDC/DC Switching Converters, Regulators & Controllers
MAX15041EVKIT+ datasheets
 


Specifications of MAX15041EVKIT+

Board Size55 mm x 55 mmOperating Supply Voltage4.5 V to 28 V
ProductPower Management Development ToolsDimensions55 mm x 55 mm
Silicon ManufacturerMaximSilicon Core NumberMAX15041
Kit Application TypePower ManagementApplication Sub TypeSynchronous Buck Converter
Kit ContentsBoardRohs CompliantYes
Lead Free Status / RoHS StatusLead free / RoHS CompliantFor Use With/related ProductsMAX15041
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19-4815; Rev 3; 3/11
Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM
Step-Down DC-DC Regulator with Internal Switches
General Description
The MAX15041 low-cost, synchronous DC-DC convert-
er 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 V
, set with two external resistors.
IN
The MAX15041 is ideal for distributed power systems,
preregulation, set-top boxes, television, and other con-
sumer applications.
The MAX15041 features a peak-current-mode PWM con-
troller with internally fixed 350kHz switching frequency
and a 90% maximum duty cycle. The current-mode con-
trol 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 com-
pensation 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 asynchro-
nous 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 power-
good signals allow for flexible power sequencing.
The MAX15041 is available in a space-saving, high-
power, 3mm x 3mm, 16-pin TQFN-EP package and is
fully specified from -40°C to +85°C.
Applications
Distributed Power Systems
Wall Adapters
Preregulators
Set-Top Boxes
Televisions
xDSL Modems
Consumer Products
________________________________________________________________ Maxim Integrated Products
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
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
0.9 x V
IN
o Internal 170mΩ R
High-Side and 105mΩ
DS-ON
R
Low-Side Power Switches
DS-ON
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 V
LDO Undervoltage Lockout
DD
o Space-Saving, Thermally Enhanced, 3mm x 3mm
Package
Ordering Information
PART
TEMP RANGE
PACKAGE
MAX15041ETE+
-40°C to +85°C 16 TQFN-EP*
+ Denotes a lead(Pb)-free/RoHS-compliant package.
* EP = Exposed pad.
Typical Operating Circuit
INPUT
12V
IN
BST
EN
LX
MAX15041
V
DD
PGND
PGOOD
FB
PGOOD
SS
COMP
SGND
Features
PIN-
TOP
MARK
AGV
OUTPUT
1.8V AT 3A
1

MAX15041EVKIT+ Summary of contents

  • Page 1

    ... Preregulators Set-Top Boxes Televisions xDSL Modems Consumer Products ________________________________________________________________ Maxim Integrated Products For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at www.maxim-ic.com Continuous Output Current o ±1% Output Accuracy Over Temperature o 4.5V to 28V Input Voltage Range o Adjustable Output Voltage Range from 0 ...

  • Page 2

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches ABSOLUTE MAXIMUM RATINGS IN to SGND.............................................................-0.3V to +30V EN to SGND .................................................-0. PGND ................................-0.3V to min (+30V PGND .....................-1V ...

  • Page 3

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches ELECTRICAL CHARACTERISTICS (continued 12V 1µ 22µ VDD IN PARAMETER FB Input Bias Current SS Current SS Discharge Resistance ...

  • Page 4

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches (V = 12V 3.3V 1µ OUT VDD IN EFFICIENCY vs. LOAD CURRENT 100 V = 12V ...

  • Page 5

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches (V = 12V 3.3V 1µ OUT VDD INPUT SUPPLY CURRENT vs. INPUT VOLTAGE 4.7FH ...

  • Page 6

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches (V = 12V 3.3V 1µ OUT VDD IN SOFT-START TIME vs. CAPACITANCE 1000 100 100 ...

  • Page 7

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches (V = 12V 3.3V 1µ OUT VDD MAXIMUM LOAD CURRENT vs. AMBIENT TEMPERATURE 3 12V IN P +150NC ...

  • Page 8

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches TOP VIEW *EXPOSED PAD, CONNECT TO SGND. PIN NAME Internal LDO 5V Output. Supply input for the internal analog core. Bypass with a ceramic capacitor of ...

  • Page 9

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches ENABLE CONTROL EN AND THERMAL SHUTDOWN BIAS GENERATOR VOLTAGE REFERENCE 0.65V 5µA 0.606V SS SS ERROR FB AMPLIFIER COMP SGND _______________________________________________________________________________________ 5V LDO MAX15041 CURRENT-SENSE/CURRENT-LIMIT LOGIC ...

  • Page 10

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches Detailed Description The MAX15041 is a high-efficiency, peak-current- mode, step-down DC-DC converter with integrated high-side (170mΩ, typ) and low-side (105mΩ, typ) power switches. The output voltage ...

  • Page 11

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches Programmable Soft-Start (SS) The MAX15041 utilizes a soft-start feature to slowly ramp up the regulated output voltage to reduce input inrush current during startup. Connect a ...

  • Page 12

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches Inductor Selection A larger inductor value results in reduced inductor ripple current, leading to a reduced output ripple voltage. However, a larger inductor value results in ...

  • Page 13

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches ERROR AMPLIFIER FEEDBACK DIVIDER V OUT OUT OUT VEA OPTIONAL. CC ...

  • Page 14

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches 1ST ASYMPTOTE A [dB]/ VEA GAIN FB OUT UNITY 1ST POLE A [dB]/ ( VEA ...

  • Page 15

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches For R much greater than ESR, the equation can be LOAD further simplified as follows OUT ...

  • Page 16

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches 2) Place capacitors IN, and SS as close as DD possible to the IC and the corresponding pin using direct traces. Keep the ...

  • Page 17

    Low-Cost, 3A, 4.5V to 28V Input, 350kHz, PWM Step-Down DC-DC Regulator with Internal Switches Chip Information PROCESS: BiCMOS ______________________________________________________________________________________ Package Information For the latest package outline information and land patterns (footprints www.maxim-ic.com/packages. Note that a “+”, “#”, or ...

  • Page 18

    ... Maxim cannot assume responsibility for use of any circuitry other than circuitry entirely embodied in a Maxim product. No circuit patent licenses are implied. Maxim reserves the right to change the circuitry and specifications without notice at any time. 18 ____________________Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 © 2011 Maxim Integrated Products ...