EV2451DT-01A_r1.0_HEXING

The Future of Analog IC TechnologyPRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

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EV2451DT-01A 0.6A, 2MHz, 36V Step-Down Converter

DESCRIPTION

The EV2451DT-01A is an evaluation board for

the MP2451, a fixed 2MHz frequency step-down switching regulator with an integrated high-side high voltage power MOSFET.

The board can provide the load current up to 0.6A. High power conversion efficiency over a wide load range is achieved by scaling down the switching frequency at light load condition. The 8V to 36V input range accommodates a variety of step-down applications. The board provides compact arrangement of components. By switching at 2MHz, smaller value inductor and input/output capacitor can be used to lower down cost and save board space. FEATURES

• • • •

Compact Arrangement of Components Wide Operating Input Range 0.6A Output Current Up to 90% Efficiency

APPLICATIONS ELECTRICAL SPECIFICATIONS Input Voltage Output Voltage Output Current Parameter Symbol Value UnitsEV2451DT-01A EVALUATION BOARD EFFICIENCY (%)M SPOC VIN 8-36 V VOUT 5 V IOUT 0-0.6 A FNDI• Smart Power Meter • High Voltage Power Conversion • Automotive Systems • Industrial Power Systems • Distributed Power Systems • Battery Powered Systems “MPS” and “The Future of Analog IC Technology” are Registered Trademarks of Monolithic Power Systems, Inc. ENTAIL (L x W x H) 0.9” x 0.5” x 0.3” 2.3cm x 1.2cm x 0.8cm Board Number

EV2451DT-01A MP2451DT DOMPS IC Number

N TOD SI1009590858075706560555010Efficiency @ VOUT=5VTRUBIVIN=24VTE VIN=8VVIN=12VVIN=36V1001000LOAD CURRENT (mA)EV2451DT-01A Rev. 1.0 www.MonolithicPower.com 12/8/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2010 MPS. All Rights Reserved.

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EV2451DT-01A – 0.6A, 2MHz, 36V STEP-DOWN CONVERTER

PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION– HEXING USE ONLY

EVALUATION BOARD SCHEMATIC

Qty Ref Value Description 1 1 1 C1 C2 C3 2.2µF 100nF 22µF EV2451DT-01A BILL OF MATERIALS Ceramic Cap, X7R, 50V Ceramic Cap, X7R, 50V Ceramic Cap, X7R, 16V Film Res, 1% 1 R1 124kΩ 1 R2 23.7kΩ Film Res, 1% 1 R3 100kΩ 1 1 1 R4 R5 D1 M Inductor, 3.3uH, 1A, 1 L1 3.3µH SMD TOKO D412C-1002AS-3R3M 120mΩ 1 U1 Step-Down Regulator SOT23-6MPS MP2451DT PS0 C Film Res, 1% ONFDIENTAIL Package1206 603 1206 603 603 603 Manufacturer Part Number MuRata MuRata MuRata Yageo Yageo GRM31CR71H225KA88LGRM188R71H104KA93DGRM31CR61C226KE15 RC0603FR-07124KL RC0603FR-0723K7L Film Res, 5% 603 Yageo RC0603JR-070RL Do Not Stuff B140-13-F B140 Diode Schottky, 40V, 1A DON TOD SMA SIYageo TRUBITERC0603FR-07100KL Diodes Inc EV2451DT-01A Rev. 1.0 www.MonolithicPower.com

12/8/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2010 MPS. All Rights Reserved.

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EV2451DT-01A – 0.6A, 2MHz, 36V STEP-DOWN CONVERTER

PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION– HEXING USE ONLY

PRINTED CIRCUIT BOARD LAYOUT

Figure 1—Top Silk Layer M

PSC ONFDI ENTAILTE Figure 2—Top Layer Figure 3—Bottom Layer

DON TOD SITRUBI Figure 4—Bottom Silk Layer

EV2451DT-01A Rev. 1.0 www.MonolithicPower.com 12/8/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2010 MPS. All Rights Reserved.

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EV2451DT-01A – 0.6A, 2MHz, 36V STEP-DOWN CONVERTER

PRELIMINARY SPECIFICATIONS SUBJECT TO CHANGE

MPS CONFIDENTIAL AND PROPRIETARY INFORMATION– HEXING USE ONLY

QUICK START GUIDE

LAITNEEDTIFUNBIORC TSSIPD M T ON OD1. Connect the positive terminal of the load to VOUT pin, and the negative terminal of the load to

GND pins. 2. Preset the power supply output to 8~36V and turn off the power supply.

3. Connect the positive terminal of the power supply output to the VIN pin and the negative

terminal of the power supply output to the GND pin. 4. Turn on the power supply. The board will automatically start up. 5. To adjust the output voltage, change the values of R1 and R2. Generally, Choose R1 around 124kΩ for optimal transient response. For VFB=0.8V, R1=124kΩ, R2 can be determined by: R2=99.2kΩ VOUT−0.8VPlease follow the application information on the MP2451 datasheet to recalculate/select compensation values, the inductor value and the output capacitor value if the output voltage needs to be reprogrammed. NOTICE: The information in this document is subject to change without notice. Users should warrant and guarantee that third party Intellectual Property rights are not infringed upon when integrating MPS products into any application. MPS will not assume any legal responsibility for any said applications.

EV2451DT-01A Rev. 1.0 www.MonolithicPower.com 12/8/2010 MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. Preliminary Specifications Subject to Change © 2010 MPS. All Rights Reserved.

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