MP2365DN

TM EV2365DN-01A 3A, 28V, 1.4MHz Step-Down Converter Evaluation Board The Future of Analog IC Technology TM DESCRIPTION The EV2365DN-01A is an evaluation board for the MP2365, a 1.4MHz step-down regulator with a built-in POWER MOSFET. The MP2365 integrates a 120mΩ MOSFETS that provides 3A continuous load current over a wide operating input voltage of 4.75V to 28V. Current mode control provides fast transient response and eases loop stabilization. An adjustable soft-start prevents inrush current at turn-on. This device, available in an 8-pin SOIC and PDIP packages, provides a very compact system solution with minimal reliance on external components. FEATURES • • • • • • • 3A Output Current Wide 4.75V to 28V Operating Input Range Adjustable Output from 0.92V to 21V Fully Assembled and Tested Distributed Power Systems Battery Chargers Pre-Regulator for Linear Regulators APPLICATIONS “MPS” and “The Future of Analog IC Technology” are Trademarks of Monolithic Power Systems, Inc. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage Output Current Symbol VIN VOUT IOUT Value 4.75 – 28 3.3 3 Units V V A EV2365DN-01A EVALUATION BOARD Efficiency Curve 100 VOUT=5V EFFICIENCY (%) 90 VOUT=3.3V 80 70 VIN=12V 60 0 0.5 1.0 1.5 2.0 2.5 LOAD CURRENT (A) 3.0 (L x W x H) 2.0” x 1.9” x 0.5” (5.0cm x 4.8 x 1.2cm) Board Number EV2365DN-01A EV2365DN-01A Rev. 1.1 9/20/2006 MPS IC Number MP2365DN www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 1 TM EV2365DN-01A – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER EVALUATION BOARD EVALUATION BOARD SCHEMATIC VIN GND 2 IN EN GND R4 NS C3 NS 7 EN 1 BS SW 3 R7 NS D1 B330A VOUT 3.3V/3A GND D2 NS C7 10nF MP2365 C11 NS 8 R8 NS SS GND 4 C6 NS 5 FB COMP 6 C5 5.6nF C14 NS EV2365DN-01A BILL OF MATERIALS Qty 2 4 1 1 1 2 3 1 1 1 3 1 1 1 1 1 1 Ref C1, C2 C3, C6, C11, C14 C4 C5 C7 C8, C9 C10, C12, C13 R1 R2 R3 R4, R7, R8 R5 R6 D1 D2 L1 U1 Value 4.7µF Description Ceramic Cap., 50V, X7R Not Stuffed 0.1µF 5.6nF 10nF 22µF 0.1µF Ceramic Cap., 25V, X7R Ceramic Cap., 50V, X7R Ceramic Cap., 50V, X7R Ceramic Cap., 6.3V, X5R Ceramic Cap., 50V, X7R 603 603 603 1210 805 603 603 603 603 603 SMA SMD SO-8 TDK Panasonic TDK TDK TDK Panasonic Panasonic Panasonic Panasonic Panasonic Diodes Inc Sumida MPS C1608X7R1E104K ECJ-1VB1H562K C1608X7R1H103K C3225X5R0J226M C2012X7R1H104K ERJ-3EKF2552V ERJ-3EKF1002V ERJ-3GEYJ104V ERJ-3GEYJ153V ERJ-3GEYJ0R00V B330A-13 CDRH8D43-4R7NC MP2365DN Package Manufacturer Part Number 1210 Murata GRM32ER71H475KA88L 25.5kΩ Film Res., 1% 10kΩ Film Res., 1% 100kΩ Film Res., 5% Not Stuffed 15kΩ Film Res., 5% 0Ω Film Res., 5% Diode Schottky, 30V, 3A Not Stuffed Inductor, 4.1A DC-DC Converter EV2365DN-01A Rev. 1.1 9/20/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 2 TM EV2365DN-01A – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER EVALUATION BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV2365DN-01A Rev. 1.1 9/20/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 3 TM EV2365DN-01A – 3A, 28V, 1.4MHz STEP-DOWN CONVERTER EVALUATION BOARD QUICK START GUIDE 1. Connect the positive and negative terminals of the load to the VOUT and GND pins, respectively. 2. Preset the power supply output to between 4.75V and 28V, then turn it off. 3. Connect the positive and negative terminals of the power supply output to the VIN and GND pins, respectively. 4. Turn the power supply on (the MP2365 will automatically startup). 5. To use the Enable function, apply a digital input to the EN pin. Drive EN higher than 2.9V to turn on the regulator or less than 0.9V to turn it off. 6. An under voltage lockout (UVLO) function can be implemented by the addition of a resistor divider (R3 and R4). The Enable threshold is 2.6V, so the VIN UVLO threshold is: R3 ⎞ ⎛ ⎜1 + ⎟ × 2 .6 V . R4 ⎠ ⎝ 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. EV2365DN-01A Rev. 1.1 9/20/2006 www.MonolithicPower.com MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2006 MPS. All Rights Reserved. 4