MP2309DS-LF Monolithic Power Systems

MP2309 1A, 23V, 340KHz Synchronous Rectified Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP2309 is a monolithic synchronous buck 1A Output Current regulator. The device integrates 140m Wide 4.75V to 23V Operating Input Range MOSFETS that provide 1A continuous load Integrated 140m Power MOSFET Switches current over a wide operating input voltage of Output Adjustable from 0.923V to 20V 4.75V to 23V. Current mode control provides Up to 95% Efficiency fast transient response and cycle-by-cycle Programmable Soft-Start current limit. Stable with Low ESR Ceramic Output Capacitors An adjustable soft-start prevents inrush current Fixed 340KHz Frequency at turn-on. Shutdown mode drops the supply Cycle-by-Cycle Over Current Protection current to 1 A. Input Under Voltage Lockout This device, available in an 8-pin SOIC APPLICATIONS package, provides a very compact system Distributed Power Systems solution with minimal reliance on external Networking Systems components. FPGA, DSP, ASIC Power Supplies EVALUATION BOARD REFERENCE Green Electronics/ Appliances Board Number Dimensions Notebook Computers EV2309DS-00A 2.0X x 1.5Y x 0.5Z MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Efficiency vs C5 10nF Load Current INPUT 100 4.75V to 23V C1 90 R4 10 F/25V 100k CERAMIC 21 L1 80 V = 5V IN IN BS 10 H OUTPUT 3 7 EN SW 3.3V 70 V = 12V IN R1 1A MP2309 26.1k 8 5 60 SS FB V = 23V IN GND COMP 1% 50 4 6 R2 C2 C3 10k 40 22 F/6.3V 3.3nF 1% C4 0.1 F R3 30 7.5k 20 0 0.25 0.5 0.75 1.0 LOAD CURRENT (A) MP2309-TAC01 MP2309-EC01 MP2309 Rev. 1.5 www.MonolithicPower.com 1 2/26/2020 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved. EFFICIENCY (%)MP2309 1A, 23V, 340KHz SYNCHRONOUS RECTIFIED STEP-DOWN CONVERTER (1) PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS Supply Voltage V ....................... 0.3V to +26V IN Switch Voltage V .................. 1V to V +0.3V SW IN Boost Voltage V .......... V 0.3V to V + 6V BS SW SW All Other Pins ................................. 0.3V to +6V TOP VIEW (2) Continuous Power Dissipation (T = +25C) A SOIC8.1.38W BS 1 8 SS Junction Temperature ............................... 150C IN 2 7 EN Lead Temperature .................................... 260C SW 3 6 COMP Storage Temperature .............. 65C to +150C GND 4 5 FB (3) Recommended Operating Conditions MP2309 PD01 SOIC8 Input Voltage V ............................ 4.75V to 23V IN Output Voltage V ..................... 0.923V to 20V OUT Ambient Operating Temperature ..... 40C to +85C (4) Thermal Resistance JA JC Part Number* Package Temperature SOIC8...................................... 90 ....... 45 ... C/W MP2309DS SOIC8 40 to +85C Notes: For Tape & Reel, add suffix Z (eg. MP2309DSZ) * 1) Exceeding these ratings may damage the device. For Lead Free, add suffix LF (eg. MP2309DSLFZ) 2) The maximum allowable power dissipation is a function of the maximum junction temperature T(MAX), the junction-to- J ambient thermal resistance , and the ambient temperature JA T . The maximum allowable continuous power dissipation at A any ambient temperature is calculated by P (MAX)=(T (MAX)- D J T )/ . Exceeding the maximum allowable power dissipation A JA will cause excessive die temperature, and the regulator will go into thermal shutdown. Internal thermal shutdown circuitry protects the device from permanent damage. 3) The device is not guaranteed to function outside of its operating conditions. 4) Measured on JESD51-7 4-layer PCB.. ELECTRICAL CHARACTERISTICS V = 12V, T = +25C, unless otherwise noted. IN A Parameter SymbolCondition Min Typ Max Units Shutdown Supply Current VEN = 0V 1 3.0 A Supply Current VEN = 2.0V, VFB = 1.0V 1.3 1.5 mA Feedback Voltage VFB 4.75V V 23V 0.900 0.923 0.946 V IN Feedback Overvoltage Threshold 1.1 V (5) Error Amplifier Voltage Gain A 400 V/V EA Error Amplifier Transconductance G I = 10 A 800 A/V EA C (5) High-Side Switch On Resistance RDS(ON)1 140 m (5) Low-Side Switch On Resistance R 140 m DS(ON)2 High-Side Switch Leakage Current VEN = 0V, VSW = 0V 10 A Upper Switch Current Limit Minimum Duty Cycle 1.4 2 A Lower Switch Current Limit From Drain to Source 0.8 A COMP to Current Sense GCS 2.4 A/V Transconductance MP2309 Rev. 1.5 www.MonolithicPower.com 2 2/26/2020 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2020 MPS. All Rights Reserved.