MAX15040EVKIT+

MAX15040EVKIT+ Datasheet

Evaluates MAX15040

Part	Datasheet
MAX15040EVKIT+	MAX15040EVKIT+ (pdf)

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Evaluates MAX15040 MAX15040 Evaluation Kit The MAX15040 evaluation kit EV kit provides a proven design to evaluate the MAX15040 high-efficiency, 4A, step-down regulator with integrated switches. The EV kit is preset for 1.8V output at load currents up to 4A from a 2.4V to 3.6V input supply. The MAX15040 features a 1MHz switching frequency, which allows the EV kit to achieve an all-ceramic capacitor design and fast-transient responses. The EV kit achieves up to 95% efficiency. The MAX15040 EV kit PCB comes with a MAX15040EWE+ installed. S Operates from 2.4V to 3.6V Input Supply S All-Ceramic Capacitor Design S 1MHz Switching Frequency S Output-Voltage Range 0.6V to x VIN S Lead Pb -Free and RoHS Compliant S Proven PCB Layout S Fully Assembled and Tested Ordering Information PART MAX15040EVKIT+ TYPE EV Kit +Denotes lead Pb -free and RoHS compliant. DESIGNATION C1 Not installed, ceramic capacitor 0805 C2, C9 22FF Q20%, 6.3V X5R ceramic 2 capacitors 0805 Murata GRM21BR60J226M C3, C8 0.1FF Q10%, 16V X7R ceramic 2 capacitors 0603 TDK C1608X7R1C104K 1FF Q10%, 16V X5R ceramic 1 capacitor 0603 TDK C1608X5R1C105K 820pF Q10%, 16V ceramic capaci- 1 tor 0603 AVX 0603YC821KAT2A 33pF Q5%, 16V COG ceramic 1 capacitor 0603 TDK C1608C0G1H330J 0.033FF Q10%, 25V X7R ceramic 1 capacitor 0603 TDK C1608X7R1E333K 470pF Q10%, 50V, X7R ceramic 1 capacitor 0603 Murata GRM188R71H471K Component List DESIGNATION C11 C12 JU1 Not installed, ceramic capacitor 0805 Not installed, ceramic capacitor 0603 1 2-pin header 0.47FH, 17.5A inductor 1 6.86mm x 6.47mm x 3.00mm Vishay IHLP2525CZERR47M06 1 10I Q5% resistor 0603 1 100kI Q1% resistor 0603 1 20kI Q5% resistor 0603 1 432I Q1% resistor 0603 1 8.06kI Q1% resistor 0603 For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at MAX15040 Evaluation Kit Evaluates MAX15040 Component Suppliers SUPPLIER AVX Corporation Murata Electronics North America, Inc. TDK Corp. Vishay PHONE 843-946-0238 770-436-1300 847-803-6100 402-563-6866 WEBSITE Note Indicate that you are using the MAX15040 when contacting these component suppliers. Quick Start Recommended Equipment U MAX15040 EV kit U 3.3V/4A DC power supply U One load capable of 4A U One digital voltmeter Procedure The MAX15040 EV kit is fully assembled and tested. Follow the steps below to verify the board operation. Caution Do not turn on power supply until all connections are completed. 1 Connect the positive terminal of the 3.3V supply to the VIN pad and the negative terminal to the nearest GND pad. 2 Connect the positive terminal of the 4A load to the VOUT pad and the negative terminal to the nearest GND pad. 3 Connect the digital voltmeter across the VOUT pad and the nearest GND pad. 4 Verify that a shunt is not installed on JU1. 5 Turn on the DC power supply. 6 Enable the load. 7 Verify that the voltmeter displays 1.8V. Detailed Description of Hardware The MAX15040 EV kit provides a proven design to evaluate the MAX15040 high-efficiency, 4A, step-down regulator with integrated switches. The applications include server, point-of-load, ASIC/CPU/DSP, DDR, base-station, telecom and networking, and RAID control power supplies. The EV kit is preset for 1.8V output at load currents up to 4A from a 2.4V to 3.6V input supply. The MAX15040 features a 1MHz fixed switching frequency, which allows the EV kit to achieve an all-ceramic capacitor design and fast-transient responses. Soft-Start and Reference Input REFIN/SS The MAX15040 utilizes an adjustable soft-start function to limit inrush current during startup. The soft-start time is adjusted by the value of C7, the external capacitor from REFIN/SS to GND. By default, C7 is currently 0.033µF, which gives a soft-start time of approximately 2.5ms. To adjust the soft-start time, determine the C7 using the following formula: C7 = 8µA x tSS /0.6V where tSS is the required soft-start time in seconds and C7 is in farads. C7 should be a minimum of 1nF capacitor between REFIN/SS and GND. When no external reference is applied at the REFIN/SS, the device uses the internal 0.6V reference. If a different reference voltage is needed, connect a reference up to VDD - 1.85V across the PCB pads of REFIN/SS and the nearest GND pad. When an external reference is applied to REFIN/SS, softstart must be provided externally and the external reference source must be able to sink 8µA soft-start current. Setting Output Voltage The MAX15040 EV kit can be adjusted from 0.6V to 90% of VIN by changing the values of R5 and R6. To determine the value of the resistor-divider, first select R5 between 2kI to 10kI. Then use the following equation to calculate R6: R6 = VFB x R5 / VOUT - VFB where VFB is equal to the reference voltage at REFIN/SS and VOUT is the output. If no external reference is applied at REFIN/SS, the internal reference is automatically selected and VFB becomes 0.6V. In this case, R6 is not needed for VOUT = 0.6V. When R5 is changed, compensation components R4, C10, R7, C5, and C6 must be recalculated to ensure loop stability refer to the Compensation Design section in the MAX15040 IC data sheet . 2 Evaluates MAX15040 MAX15040 Evaluation Kit Regulator Enable EN To shut down the converter, install a shunt on jumper JU1. For normal operation, remove the shunt from JU1. See Table 1 to configure jumper JU1. Table Regulator Enable EN Jumper JU1 Description SHUNT POSITION 1-2 Open* DESCRIPTION Disables the MAX15040 Normal operation

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Evaluates MAX15040

MAX15040 Evaluation Kit

The MAX15040 evaluation kit EV kit provides a proven design to evaluate the MAX15040 high-efficiency, 4A, step-down regulator with integrated switches. The EV kit is preset for 1.8V output at load currents up to 4A from a 2.4V to 3.6V input supply. The MAX15040 features a 1MHz switching frequency, which allows the EV kit to achieve an all-ceramic capacitor design and fast-transient responses. The EV kit achieves up to 95% efficiency.

The MAX15040 EV kit PCB comes with a MAX15040EWE+ installed.

S Operates from 2.4V to 3.6V Input Supply S All-Ceramic Capacitor Design S 1MHz Switching Frequency S Output-Voltage Range 0.6V to x VIN S Lead Pb -Free and RoHS Compliant S Proven PCB Layout S Fully Assembled and Tested
Ordering Information

PART MAX15040EVKIT+

TYPE EV Kit
+Denotes lead Pb -free and RoHS compliant.

DESIGNATION C1

Not installed, ceramic capacitor 0805

C2, C9
22FF Q20%, 6.3V X5R ceramic 2 capacitors 0805

Murata GRM21BR60J226M

C3, C8
0.1FF Q10%, 16V X7R ceramic 2 capacitors 0603

TDK C1608X7R1C104K
1FF Q10%, 16V X5R ceramic
1 capacitor 0603

TDK C1608X5R1C105K
820pF Q10%, 16V ceramic capaci-
1 tor 0603

AVX 0603YC821KAT2A
33pF Q5%, 16V COG ceramic
1 capacitor 0603

TDK C1608C0G1H330J
0.033FF Q10%, 25V X7R ceramic
1 capacitor 0603

TDK C1608X7R1E333K
470pF Q10%, 50V, X7R ceramic
1 capacitor 0603

Murata GRM188R71H471K

Component List

DESIGNATION C11

C12 JU1

Not installed, ceramic capacitor 0805

Not installed, ceramic capacitor 0603
1 2-pin header
0.47FH, 17.5A inductor
1 6.86mm x 6.47mm x 3.00mm

Vishay IHLP2525CZERR47M06
1 10I Q5% resistor 0603
1 100kI Q1% resistor 0603
1 20kI Q5% resistor 0603
1 432I Q1% resistor 0603
1 8.06kI Q1% resistor 0603
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642, or visit Maxim’s website at

MAX15040 Evaluation Kit

Evaluates MAX15040

Component Suppliers

SUPPLIER AVX Corporation Murata Electronics North America, Inc. TDK Corp. Vishay

PHONE 843-946-0238 770-436-1300 847-803-6100 402-563-6866

WEBSITE

Note Indicate that you are using the MAX15040 when contacting these component suppliers.

Quick Start

Recommended Equipment U MAX15040 EV kit

U 3.3V/4A DC power supply

U One load capable of 4A

U One digital voltmeter

Procedure The MAX15040 EV kit is fully assembled and tested. Follow the steps below to verify the board operation. Caution Do not turn on power supply until all connections are completed.
1 Connect the positive terminal of the 3.3V supply to the VIN pad and the negative terminal to the nearest GND pad.
2 Connect the positive terminal of the 4A load to the VOUT pad and the negative terminal to the nearest GND pad.
3 Connect the digital voltmeter across the VOUT pad and the nearest GND pad.
4 Verify that a shunt is not installed on JU1.
5 Turn on the DC power supply.
6 Enable the load.
7 Verify that the voltmeter displays 1.8V.

Detailed Description of Hardware

The MAX15040 EV kit provides a proven design to evaluate the MAX15040 high-efficiency, 4A, step-down regulator with integrated switches. The applications include server, point-of-load, ASIC/CPU/DSP, DDR, base-station, telecom and networking, and RAID control power supplies. The EV kit is preset for 1.8V output at load currents up to 4A from a 2.4V to 3.6V input supply. The MAX15040 features a 1MHz fixed switching frequency, which allows the EV kit to achieve an all-ceramic capacitor design and fast-transient responses.

Soft-Start and Reference Input REFIN/SS The MAX15040 utilizes an adjustable soft-start function to limit inrush current during startup. The soft-start time is adjusted by the value of C7, the external capacitor from REFIN/SS to GND. By default, C7 is currently 0.033µF, which gives a soft-start time of approximately 2.5ms. To adjust the soft-start time, determine the C7 using the following formula:

C7 = 8µA x tSS /0.6V
where tSS is the required soft-start time in seconds and C7 is in farads. C7 should be a minimum of 1nF capacitor between REFIN/SS and GND.

When no external reference is applied at the REFIN/SS, the device uses the internal 0.6V reference. If a different reference voltage is needed, connect a reference up to VDD - 1.85V across the PCB pads of REFIN/SS and the nearest GND pad.

When an external reference is applied to REFIN/SS, softstart must be provided externally and the external reference source must be able to sink 8µA soft-start current.

Setting Output Voltage The MAX15040 EV kit can be adjusted from 0.6V to 90% of VIN by changing the values of R5 and R6. To determine the value of the resistor-divider, first select R5 between 2kI to 10kI. Then use the following equation to calculate R6:

R6 = VFB x R5 / VOUT - VFB
where VFB is equal to the reference voltage at REFIN/SS and VOUT is the output. If no external reference is applied at REFIN/SS, the internal reference is automatically selected and VFB becomes 0.6V. In this case, R6 is not needed for VOUT = 0.6V.

When R5 is changed, compensation components R4, C10, R7, C5, and C6 must be recalculated to ensure loop stability refer to the Compensation Design section in the MAX15040 IC data sheet .
2

Evaluates MAX15040

MAX15040 Evaluation Kit

Regulator Enable EN To shut down the converter, install a shunt on jumper JU1. For normal operation, remove the shunt from JU1. See Table 1 to configure jumper JU1.

Table Regulator Enable EN Jumper JU1 Description

SHUNT POSITION 1-2

Open*

DESCRIPTION Disables the MAX15040

Normal operation

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 MAX15040EVKIT+ Datasheet file may be downloaded here without warranties.

Datasheet ID: MAX15040EVKIT+ 647236