EV2355DN-00A MPS | Alldatasheet

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4.75V to 23V In, 3A Out Step-Down DC/DC Converter EVALUATION BOARD — INITIAL RELEASE 01/05, Rev. 1.0 MPS Proprietary Information. © 2005 All Rights Reserved. 1 Unauthorized Photocopy and Duplication Prohibited. Monolithic Power Systems GENERAL DESCRIPTION The EV2355DN-00A is the Evaluation Board for MPS’ MP2355 Step-Down DC/DC Converter. It features a wide supply range of 4.75V to 23V and a continuous output current up to 3A. The output voltage is set to 3.3V, but can be easily adjusted to other levels from 1.22V. A 380KHz high switching frequency allows the use of small, low cost capacitors and inductors. Current mode control and an integrated power MOSFET minimize component count, board area, and solution cost. Fault condition protection includes cycle-by-cycle current limiting, thermal shutdown, and under-voltage lockout. Internal soft-start reduces the turn-on stress. The small 8-pin SOIC package with exposed pad minimizes board area and provides excellent thermal management. ELECTRICAL SPECIFICATION Parameter Symbol Value Units Supply Voltage V IN 4.75 to 23 V Output Voltage V OUT 3.3 V Output Current I OUT 0 to 3 A

FEATURES

  • Up to 3A Continuous Output Current
  • Wide 4.75V to 23V Operating Input Range
  • Monolithic Buck with 100m Ω Internal FET
  • Fixed 380KHz Frequency
  • All Ceramic Input and Output Capacitors
  • Programmable Soft-Start
  • Programmable Input Under-Voltage Lockout

APPLICATIONS

  • Distributed Power Systems
  • Battery Chargers
  • Pre-Regulator for Linear Regulators “MPS” and “Monolithic Power Systems”, are Registered Trademarks of Monolithic Power Systems, Inc. EV2355DN-00A EVALUATION BOARD Dimensions (2.6”X x 1.9”Y x 0.4”Z) Board Number MPS IC Number EV2355DN-00A MP2355 EFFICIENCY (%) LOAD CURRENT (mA) MP2355_EC01 Efficiency vs Load Current 0 1500 1000500 2000 3500 30002500 VOUT=3.3VVOUT=2.5V VOUT=5.0V

EV2355DN-00A – 4.75V TO 23V IN, 3A OUT STEP-DOWN CONVERTER EVALUATION BOARD — INITIAL RELEASE 01/05, Rev. 1.0 MPS Proprietary Information. © 2005 All Rights Reserved. 2 Unauthorized Photocopy and Duplication Prohibited. EVALUATION BOARD SCHEMATIC MP2355 BSTVIN FB LX GND RUN SS COMP C10 OPEN OPEN VOUT B340A 10nF 4.7nFC2 OPEN 10nF C11 OPEN OPEN OPEN OPEN OPEN VIN EN SYNC EV2355_S01 EV2355DN-00A BILL OF MATERIALS Qty Ref Value Description Package Manufacturer Manufacturer P/N

2 C3, C4 10nF Ceramic Cap, 50V, X7R SM0805 AVX 08055C103KAT2A

1 C7 10µF Ceramic Cap, 25V , X5R SM1210 AVX 12103D106KAT2A

1 C5 4.7nF Ceramic Cap, 50V, X7R SM0805 AVX 08055C472KAT2A C1, C2, C6, C9, C10, C11 Do Not Stuff

1 C8 22µF Ceramic Cap, 16V, X5R SM1210 AVX 1210YD226KAT2A

1 D1 Schottky Diode, 40V, 3A SMA Diodes Inc B340A-13

1 L1 15µH Inductor, 3.6A SMD Sumida CDRH104R 1 R4 16.9k Ω Film Res, 1% SM0805 Panasonic ERJ-6ENF1692V 1 R2 4.7k Ω Film Res, 5% SM0805 Panasonic ERJ-6GEYJ472V

1 R5 10k Ω Film Res, 1% SM0805 Panasonic ERJ-6ENF1002V

2 R1, R3 Do Not Stuff

1 U1 DC-DC Converter SO8 MPS MP2355DN

EV2355DN-00A – 4.75V TO 23V IN, 3A OUT STEP-DOWN CONVERTER EVALUATION BOARD — INITIAL RELEASE NOTICE: The information in this document is subject to change without notice. Please contact MPS for current specifications. 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. EV2355DN-00A Rev. 1.0 Monolithic Power Systems, Inc. 4 1/4/2005 983 University Avenue, Building A, Los Gatos, CA 95032 USA Tel: 408-357-6600 ♦ Fax: 408-357-6601 ♦ www.MonolithicPower.com MPS Proprietary Information. © 2005 All Rights Reserv ed. Unauthorized Photocopy and Duplication Prohibited. QUICK START GUIDE 1. Connect the positive terminal of the load to VO UT pins, and the negative terminal of the load to GND pins 2. Preset the power supply output to 4.75V to 23V 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 the power supply on. The MP2355 will automatically startup. 5. To use the Enable function, apply a digital input to EN pin. Drive EN higher than 2.5V to turn on the regulator, drive EN less than 0.7V to turn it off. 6. An input under voltage lockout (UVLO) function can be implemented by the addition of a resistor divider R4 and R5. The EN threshold is 2.5V, so V IN UVLO threshold is V5.25R 4R1 ×⎟ ⎛ + The output voltage of this board is preset to 3.3V. This board is laid out to accommodate most commonly used inductors and output capacitors and to be programmed for most standard output voltages. For other output voltages, please refer to the Application Information section in the MP2355 datasheet.