MAX15040EWE+T

Manufacturer Part NumberMAX15040EWE+T
DescriptionDC/DC Switching Controllers 4A Step-Down w/Internal Switch
ManufacturerMaxim Integrated Products
MAX15040EWE+T datasheet
 


Specifications of MAX15040EWE+T

Lead Free Status / Rohs StatusLead free / RoHS Compliant  
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19-4426; Rev 2; 7/10
High-Efficiency, 4A, Step-Down Regulator with
Integrated Switches in 2mm x 2mm Package
General Description
The MAX15040 high-efficiency switching regulator
delivers up to 4A load current at output voltages from
0.6V to (0.9 x V
). The device operates from 2.4V to
IN
3.6V, making it ideal for on-board point-of-load and
postregulation applications. Total output-voltage accu-
racy is within ±1% over load, line, and temperature.
The MAX15040 features 1MHz fixed-frequency PWM
mode operation. The high operating frequency allows
for small-size external components.
The low-resistance on-chip nMOS switches ensure high
efficiency at heavy loads while minimizing critical parasitic
inductances, making the layout a much simpler task with
respect to discrete solutions. Following a simple layout
and footprint ensures first-pass success in new designs.
The MAX15040 incorporates a high-bandwidth
(> 15MHz) voltage-error amplifier. The voltage-mode
control architecture and the voltage-error amplifier per-
mit a Type III compensation scheme to achieve maxi-
mum loop bandwidth, up to 200kHz. High loop
bandwidth provides fast transient response, resulting in
less required output capacitance and allowing for all-
ceramic capacitor designs.
The MAX15040 features an output overload hiccup pro-
tection and peak current limit on both high-side (sourc-
ing current) and low-side (sinking and sourcing current)
MOSFETs, for ultra-safe operations in case of high out-
put prebias, short-circuit conditions, severe overloads,
or in converters with bulk electrolytic capacitors.
The MAX15040 features an adjustable output voltage.
The output voltage is adjustable by using two external
resistors at the feedback or by applying an external ref-
erence voltage to the REFIN/SS input. The MAX15040
offers programmable soft-start time using one capacitor
to reduce input inrush current. A built-in thermal shut-
down protection assures safe operation under all condi-
tions. The MAX15040 is available in a 2mm x 2mm,
16-bump (4 x 4 array), 0.5mm pitch WLP package.
Server Power Supplies
Point-of-Load
ASIC/CPU/DSP Core and I/O Voltages
DDR Power Supplies
Base-Station Power Supplies
Telecom and Networking Power Supplies
RAID Control Power Supplies
Pin Configuration appears at end of data sheet.
________________________________________________________________ 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 Internal 15mΩ R
o Continuous 4A Output Current
o ±1% Output-Voltage Accuracy Over Load, Line,
and Temperature
o Operates from 2.4V to 3.6V Supply
o Adjustable Output from 0.6V to (0.9 x V
o Adjustable Soft-Start Reduces Inrush Supply
Current
o Factory-Trimmed 1MHz Switching Frequency
o Compatible with Ceramic, Polymer, and
Electrolytic Output Capacitors
o Safe Startup into Prebias Output
o Enable Input/Power-Good Output
o Fully Protected Against Overcurrent and
Overtemperature
o Overload Hiccup Protection
o Sink/Source Current in DDR Applications
o 2mm x 2mm, 16-Bump (4 x 4 Array), 0.5mm Pitch
WLP Package
PART
M AX 15040E WE +
+ Denotes a lead(Pb)-free/RoHS-compliant package.
INPUT
2.4V TO 3.6V
Applications
Features
MOSFETs
DS(ON)
)
IN
Ordering Information
TEMP RANGE
PIN-PACKAGE
- 40°C to + 85°C
16 WLP
Typical Operating Circuit
IN
BST
MAX15040
EN
OUTPUT
LX
V
DD
GND
FB
REFIN/SS
V
DD
COMP
PWRGD
GND
1

MAX15040EWE+T Summary of contents

  • Page 1

    ... Base-Station Power Supplies Telecom and Networking Power Supplies RAID Control Power Supplies Pin Configuration appears at end of data sheet. ________________________________________________________________ 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 Internal 15mΩ Continuous 4A Output Current o ± ...

  • Page 2

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package ABSOLUTE MAXIMUM RATINGS IN PWRGD to GND ......................................-0.3V to +4. GND....................-0.3V to the lower of 4. Transient ..............(V - 1.5V, ...

  • Page 3

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package ELECTRICAL CHARACTERISTICS (continued 3.3V -40°C to +85°C. Typical values are PARAMETER ERROR AMPLIFIER FB Regulation Accuracy Using ...

  • Page 4

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package ELECTRICAL CHARACTERISTICS (continued 3.3V -40°C to +85°C. Typical values are PARAMETER THERMAL SHUTDOWN Thermal-Shutdown Threshold Thermal-Shutdown Hysteresis ...

  • Page 5

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package ( 3.3V, output voltage = 1.8V EFFICIENCY vs. OUTPUT CURRENT 100 1.8V OUT 1.5V OUT ...

  • Page 6

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package ( 3.3V, output voltage = 1.8V INPUT SHUTDOWN CURRENT vs. INPUT VOLTAGE ...

  • Page 7

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package ( 3.3V, output voltage = 1.8V STARTING INTO PREBIAS OUTPUT ABOVE NOMINAL SETPOINT WITH NO LOAD OUT V PWRGD ...

  • Page 8

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package SHUTDOWN EN CONTROL BIAS GENERATOR VOLTAGE REFERENCE SOFT-START REFIN/SS FB COMP COMP CLAMPS 8 _______________________________________________________________________________________ V DD UVLO CIRCUITRY CURRENT-LIMIT COMPARATOR SHDN CONTROL LOGIC THERMAL SHUTDOWN CURRENT-LIMIT ERROR ...

  • Page 9

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package INPUT 2. 22µF 0.1µF R1 10Ω C5 1µF ON OFF C8 0.033µF Figure 1. All-Ceramic Capacitor Design with V Detailed Description The MAX15040 high-efficiency, ...

  • Page 10

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package The internal, high-side MOSFET has a typical 7A peak cur- rent-limit threshold. When current flowing out of LX exceeds this limit, the high-side MOSFET turns off and the ...

  • Page 11

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package Drive EN to GND to shut down the device and reduce quiescent current to less than 0.1µA. During shutdown high impedance. Drive EN high to enable ...

  • Page 12

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package Input-Capacitor Selection The input capacitor reduces the current peaks drawn from the input power supply and reduces switching noise in the device. The total input capacitance must be ...

  • Page 13

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package OUT MAX15040 COMP C2 Figure 4. Type III Compensation Network The zero-cross frequency of the closed-loop between 10% and 20% ...

  • Page 14

    High-Efficiency, 4A, Step-Down Regulator with Integrated Switches in 2mm x 2mm Package PCB Layout Considerations and Thermal Performance Careful PCB layout is critical to achieve clean and stable operation highly recommended to duplicate the MAX15040 evaluation kit layout ...

  • Page 15

    ... 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. Maxim Integrated Products, 120 San Gabriel Drive, Sunnyvale, CA 94086 408-737-7600 ____________________ 15 © 2010 Maxim Integrated Products DESCRIPTION Maxim is a registered trademark of Maxim Integrated Products, Inc ...