EV2351DQ-00A MPS | Alldatasheet
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4.75V to 23V Input, 1.5A Output Step-Down DC/DC Converter EVALUATION BOARD - INITIAL RELEASE EV2351DQ-00A Rev. 1.1 www.MonolithicPower.com 1 3/29/2005 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. The Future of Analog IC Technology GENERAL DESCRIPTION The EV2351DQ-00A is the Evaluation Board for MPS’ MP2351 Step-Down DC/DC Converter. It features a wide supply range of 4.75V to 23V and a continuous output current up to 1.5A. The output voltage is set to 3.3V, but can be easily adjusted to other levels from 1.22V. A 1.4MHz 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 10-pin QFN package minimizes board area. ELECTRICAL SPECIFICATIONS Parameter Symbol Value Units Supply Voltage V IN 4.75 – 23 V Output Voltage V OUT 5 V Output Current I OUT 0 – 1.5 A
FEATURES
- Up to 1.5A Output Current
- Wide 4.75 to 23V Operating Input Range
- Monolithic Buck with 180m Ω Internal FET
- Fixed 1.4MHz Frequency
- All Ceramic Input and Output Capacitors
- Programmable Input Under-Voltage Lockout
APPLICATIONS
- Distributed Power Systems
- Battery Chargers
- DSL Modems
- Pre-Regulators for Linear Regulators “MPS” and “The Future of Analog IC Technology”, are Registered Trademarks of Monolithic Power Systems, Inc. EV2351DQ-00A EVALUATION BOARD Dimensions (2.1”X x 1.3”Y x 0.4”Z) Board Number MPS IC Number EV2351DQ-00A MP2351 VOUT=5V VOUT=2.5V VOUT=3.3V 100 EFFICIENCY (%) 0 1500300 600 900 1200 LOAD CURRENT (mA) MP2351-EC01 Efficiency vs Load Current
EV2351DQ-00A – 4.75V TO 23V INPUT, 1.5A OUTPUT STEP-DOWN CONVERTER EVALUATION BOARD - INITIAL RELEASE EV2351DQ-00A Rev. 1.1 www.MonolithicPower.com 2 3/29/2005 MPS Proprietary Information. Unaut horized Photocopy and Duplication Prohibited. © 2005 MPS. All Rights Reserved. EVALUATION BOARD SCHEMATIC MP2351 GND FB COMP EN SYNCNC BS NC IN SW VIN 10nF B340A-13 OPEN VOUT R5 OPEN C7 OPEN C8 OPEN 1nF EN SYNC OPEN OPEN EV2351_S01 EV2351DQ-00A BILL OF MATERIALS Qty Ref Value Description Package Manufacturer Manufacturer P/N
1 C1 10nF Ceramic Capacitor, 50V, X7R SM0805 AVX 08055C103KAT2A
1 C2 10µF Ceramic Capacitor, 25V, X5R SM1210 AVX 12103D106KAT2A
1 C3 1nF Ceramic Capacitor, 50V, X7R SM0805 AVX 08055C102KAT2A
1 C5 22µF Ceramic Capacitor, 16V, X5R SM1210 AVX 1210YD226KAT2A
4 C4, C7,
C6, C8 Do Not Stuff
1 D1 Diode Schottky, 40V, 3A SMA Diodes Inc B340A-13
1 L1 5µH Inductor, 2.4A SMD Sumida CDRH6D28-5R0NC 1 R1 16.9k Ω Film Resistor, 1% SM0805 Panasonic ERJ-6ENF1692V