MP2364 Dual 1.5A, 23V, 1.4MHz Step-Down Converter The Future of Analog IC Technology DESCRIPTION FEATURES The MP2364 is a dual monolithic step-down 1.5A Current for Each Output switch mode converter with built-in internal 0.18 Internal Power MOSFET Switches power MOSFETs. It achieves 1.5A continuous Stable with Low ESR Output Ceramic output current for each output over a wide input Capacitors supply range with excellent load and line Up to 90% Efficiency regulation. 40A Shutdown Mode Fixed 1.4MHz Frequency Current mode operation provides fast transient Thermal Shutdown response and eases loop stabilization. Cycle-by-Cycle Over Current Protection Fault condition protection includes cycle-by-cycle Wide 4.75V to 23V Operating Input Range current limiting and thermal shutdown. In Each Output Adjustable from 0.92V to 16V shutdown mode, the regulator draws 40A of Configurable for Single Output with Double supply current. the Current The MP2364 requires a minimum number of Programmable Under Voltage Lockout readily available standard external components. Programmable Soft-Start Available in a TSSOP20 with an Exposed EVALUATION BOARD REFERENCE Pad. Board Number Dimensions APPLICATIONS EV2364DF-01A 2.2X x 1.6Y x 0.4Z Distributed Power Systems I/O and Core supplies DSL Modems Set top boxes Cable Modems MPS and The Future of Analog IC Technology are Registered Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION 12V Efficiency vs 10uF 10uF Load Current 3.3V 1.5A 10k 25.5k 1 20 100 SSA ENA OFF ON 2 19 0.47uF NC1 COMPA 3 18 82pF 10k V =3.3V V =5V 2.2nF OUT OUT BSA FBA 90 4 17 10nF INA SGB 5uH 5 16 2A SWA PGB 22uF MP2364 Schottky 2A 6 15 2.5V 1.5A 22uF PGA SWB 80 Schottky 7 14 5uH V =2.5V OUT SGA INB 10nF 8 13 FBB NC2 9 12 70 COMPB BSB 10 11 ENB SSB OFF ON 7.5k 60 0.47uF 3.3nF V =12V IN 16.9k L=5 H 50 10k 0 0.5 1.0 1.5 LOAD CURRENT (A) MP2364 Rev. 1.6 www.MonolithicPower.com 1 1/22/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved. EFFICIENCY (%)MP2364 DUAL 1.5A, 23V, 1.4MHz STEP-DOWN CONVERTER (1) PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS Supply Voltage ( )................................ 25V INA, INB Switch Voltage ( ).............................. 26V SWA, SWB TOP VIEW Bootstrap Voltage ( ) .................. V + 6V BSA, BSB SW Feedback Voltage ( ) ............0.3V to +6V SSA 1 20 ENA FBA, FBB Enable/UVLO Voltage ( ) .....0.3V to +6V ENA, ENB NC1 2 19 COMPA Comp Voltage ( ) ..........0.3V to +6V COMPA, COMPB BSA 3 18 FBA Soft Start Voltage ( ).............0.3V to +6V SSA, SSB INA 4 17 SGB Junction Temperature.............................+150C Lead Temperature ..................................+260C SWA 5 16 PGB Storage Temperature ..............65C to +150C PGA 6 15 SWB (2) SGA 7 14 INB Recommended Operating Conditions Supply Voltage (V ) ...................... 4.75V to 23V FBB 8 13 NC2 IN Operating Temperature.................40C to +85 C COMPB 9 12 BSB (3) ENB 10 11 SSB Thermal Resistance JA JC TSSOP20F ............................. 40....... 6.... C/W EXPOSED PAD FOR TSSOP20F ONLY Notes: 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its Part Number* Package Temperature operating conditions. 3) Measured on approximately 1 square of 1 oz copper. MP2364DF TSSOP20F 40 C to +85C For Tape & Reel, add suffix Z (eg. MP2364DFZ) * For Lead Free, add suffix LF (eg. MP2364DFLFZ) MP2364 Rev. 1.6 www.MonolithicPower.com 2 1/22/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved.