EV2359DJ-00B 1.2A, 24V, 1.4MHz Step-Down Converter Evaluation Board in TSOT23-6 FEATURES • 1.2A Output Current • Wide 4.5V to 24V Operating Input Range • Output Adjustable from 0.8V to 15V • Fully Assembled and Tested APPLICATIONS • Cable Set-Top Box/Digital Video Recorders • xDSL Modems/Routers • Pre-Regulator for Linear Regulators “MPS” and “The Future of Analog IC Technology”, are Trademarks of Monolithic Power Systems, Inc. The Future of Analog IC Technology DESCRIPTION The EV2359DJ-00B is the evaluation board for the MP2359, a monolithic non-synchronous step-down switch mode converter with an integrated power MOSFET. The MP2359 achieves 1.2A continuous output current over a wide input supply range with excellent load and line regulation. Current mode operation provides fast transient response and eases loop stabilization. Fault condition protection includes cycle-by-cycle current limiting and thermal shutdown. The MP2359 is available in TSOT23-6 and SOT23-6 packages. ELECTRICAL SPECIFICATIONS Parameter Input Voltage Output Voltage Output Current Value Units 4.5 – 24 V V A VIN VOUT IOUT Symbol 3.3 1 EV2359DJ-00B EVALUATION BOARD ) % ( I Y C N E C F F E I (L x W x H) 2.1” x 1.9” x 0.4” (5.3cm x 4.8cm x 1.0cm) Board Number EV2359DJ-00B MPS IC Number MP2359DJ 100 95 90 85 80 75 70 65 60 55 50 Efficiency vs Load Current VOUT = 5V VOUT = 3.3V VIN = 12V 10 100 1000 LOAD CURRENT (mA) MP2359-EC01 EV2359DJ-00B Rev. 1.0 5/5/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. www.MonolithicPower.com © 2006 MPS. All Rights Reserved. 1 

EV2359DJ-00B – 1.2A, 24V, 1MHz STEP-DOWN CONVERTER in TSOT23-6 EV BOARD EVALUATION BOARD SCHEMATIC VIN GND EN D3 1N4148 (Optional) 5 4 IN BS EN MP2359 SW GND FB U1 1 6 3 C3 22nF D2 1N4148 (Optional) D1 B230A-13-F C6 NS VOUT 3.3V GND EV2359_S01 Ref C1 C3 C2 C6 D1 Value Description 0.1µF Ceramic Capacitor, 50V, X7R 10µF Ceramic Capacitor, 25V, X5R 22nF Ceramic Capacitor, 50V, X7R 22µF Ceramic Capacitor, 6.3V, X5R EV2359DJ-00B BILL OF MATERIALS Qty 2 C4, C5 1 1 1 1 1 2 D2, D3 1 1 1 1 1 1 4.7µH 49.9kΩ Resistor, 1% 16.2kΩ Resistor, 1% 100kΩ Resistor, 5% Resistor, 5% DC/DC Converter Not Stuffed, Optional Diode Schottky, 40V, 1A Not Stuffed, Optional Inductor, 1.66A, D63LCB L1 R1 R2 R3 R4 U1 0Ω TDK TDK TDK SOD-123 Diodes Inc. 0603 1206 Murata 0603 1206 Package Manufacturer Manufacturer P/N C1608X7R1H104K GRM31CR61E106KA12L C1608X7R1H223K C3216X5R0J226M 1N5819HW-7 A921CY-4R7M ERJ-3EKF4992V ERJ-3EKF1622V ERJ-3GEYJ104V ERJ-3GEY0R00V MP2359DJ Toko Panasonic Panasonic Panasonic Panasonic SMD 0603 0603 0603 0603 TSOT23-6 MPS EV2359DJ-00B Rev. 1.0 5/5/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. www.MonolithicPower.com © 2006 MPS. All Rights Reserved. 2 

EV2359DJ-00B – 1.2A, 24V, 1MHz STEP-DOWN CONVERTER in TSOT23-6 EV BOARD PRINTED CIRCUIT BOARD LAYOUT Figure 1—Top Silk Layer Figure 2—Top Layer Figure 3—Bottom Layer EV2359DJ-00B Rev. 1.0 5/5/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. www.MonolithicPower.com © 2006 MPS. All Rights Reserved. 3 

EV2359DJ-00B – 1.2A, 24V, 1MHz STEP-DOWN CONVERTER in TSOT23-6 EV BOARD QUICK START GUIDE 1. Connect the positive terminal of the load to VOUT pin, and the negative terminal of the load to GND pin. 2. Preset the power supply output to 4.5V – 24V 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 board will automatically startup. 5. To use the Enable function, apply a digital input to EN pin. Drive EN higher than 1.2V to turn on the regulator, drive EN less than 0.4V to turn it off. 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. EV2359DJ-00B Rev. 1.0 5/5/2006 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. www.MonolithicPower.com © 2006 MPS. All Rights Reserved. 4