MP2305DS-LF

MP2305 2A, 23V Synchronous Rectified Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP2305 is a monolithic synchronous buck regulator. The device integrates 130mΩ MOSFETS that provide 2A continuous load current over a wide operating input voltage of 4.75V to 23V. Current mode control provides fast transient response and cycle-by-cycle current limit. • • • • • • • • • • An adjustable soft-start prevents inrush current at turn-on. Shutdown mode drops the supply current to 1μA. This device, available in an 8-pin SOIC package, provides a very compact system solution with minimal reliance on external components. EVALUATION BOARD REFERENCE Board Number Dimensions EV2305DS-00A 2.0”X x 1.5”Y x 0.5”Z 2A Output Current Wide 4.75V to 23V Operating Input Range Integrated 130mΩ Power MOSFET Switches Output Adjustable from 0.923V to 20V Up to 93% Efficiency Programmable Soft-Start Stable with Low ESR Ceramic Output Capacitors Fixed 340kHz Frequency Cycle-by-Cycle Over Current Protection Input Under Voltage Lockout APPLICATIONS • • • • • Distributed Power Systems Networking Systems FPGA, DSP, ASIC Power Supplies Green Electronics/ Appliances Notebook Computers All MPS parts are lead-free and adhere to the RoHS directive. For MPS green status, please visit MPS website under Products, Quality Assurance page. “MPS” and “The Future of Analog IC Technology” are registered trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION C5 10nF Efficiency vs Load Current 100 VOUT = 3.3V 95 7 90 1 BS 3 SW EN MP2305 8 SS GND 4 FB COMP 6 5 EFFICIENCY (%) 2 IN 85 VOUT = 2.5V 80 75 70 65 60 55 50 0 0.5 1.0 1.5 2.0 LOAD CURRENT (A) 2.5 MP2305-EC01 MP2305 Rev. 1.83 12/24/2013 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 1 MP2305 – 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER ORDERING INFORMATION Part Number* Package Top Marking Free Air Temperature (TA) MP2305DS SOIC8 MP2305DS -40°C to +85°C * For Tape & Reel, add suffix –Z (e.g. MP2305DS–Z); For RoHS compliant packaging, add suffix –LF (e.g. MP2305DS–LF–Z) PACKAGE REFERENCE TOP VIEW BS 1 8 SS IN 2 7 EN SW 3 6 COMP GND 4 5 FB MP2305_PD01 ABSOLUTE MAXIMUM RATINGS (1) Thermal Resistance Supply Voltage VIN .......................–0.3V to +26V Switch Voltage VSW ............................................. –1V (-5V for 65% VIN In these cases, an external BST diode is recommended from the output of the voltage regulator to BST pin, as shown in Figure 2 External BST Diode IN4148 BST MP2305 SW CBST L + COUT 5V or 3.3V Figure 2—Add Optional External Bootstrap Diode to Enhance Efficiency The recommended external BST diode is IN4148, and the BST cap is 0.1~1µF. 4 2π × R3 × f C Where R3 is the compensation resistor. MP2305 Rev. 1.83 12/24/2013 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 9 MP2305 – 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER TYPICAL APPLICATION CIRCUIT INPUT 4.75V to 23V 2 7 1 IN BS 3 SW EN MP2305 8 SS GND 4 FB COMP 5 6 Figure 3—MP2305 with 3.3V Output, 22µF/6.3V Ceramic Output Capacitor MP2305 Rev. 1.83 12/24/2013 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 10 MP2305 – 2A, 23V SYNCHRONOUS RECTIFIED, STEP-DOWN CONVERTER PACKAGE INFORMATION SOIC8 0.189(4.80) 0.197(5.00) 8 0.050(1.27) 0.024(0.61) 5 0.063(1.60) 0.150(3.80) 0.157(4.00) PIN 1 ID 1 0.228(5.80) 0.244(6.20) 0.213(5.40) 4 TOP VIEW RECOMMENDED LAND PATTERN 0.053(1.35) 0.069(1.75) SEATING PLANE 0.004(0.10) 0.010(0.25) 0.013(0.33) 0.020(0.51) 0.0075(0.19) 0.0098(0.25) SEE DETAIL "A" 0.050(1.27) BSC SIDE VIEW FRONT VIEW 0.010(0.25) x 45o 0.020(0.50) GAUGE PLANE 0.010(0.25) BSC 0o-8o 0.016(0.41) 0.050(1.27) DETAIL "A" NOTE: 1) CONTROL DIMENSION IS IN INCHES. DIMENSION IN BRACKET IS IN MILLIMETERS. 2) PACKAGE LENGTH DOES NOT INCLUDE MOLD FLASH, PROTRUSIONS OR GATE BURRS. 3) PACKAGE WIDTH DOES NOT INCLUDE INTERLEAD FLASH OR PROTRUSIONS. 4) LEAD COPLANARITY (BOTTOM OF LEADS AFTER FORMING) SHALL BE 0.004" INCHES MAX. 5) DRAWING CONFORMS TO JEDEC MS-012, VARIATION AA. 6) DRAWING IS NOT TO SCALE. 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. MP2305 Rev. 1.83 12/24/2013 www.MonolithicPower.com MPS Proprietary Information. Patent Protected. Unauthorized Photocopy and Duplication Prohibited. © 2013 MPS. All Rights Reserved. 11