MP2362DF-LF Monolithic Power Systems

MP2362 Dual 2A, 23V, 380KHz Step-Down Converter with Frequency Synchronization The Future of Analog IC Technology DESCRIPTION FEATURES The MP2362 is a dual monolithic step-down 2A Current for Each Output switch mode converter with built-in internal 0.18 Internal Power MOSFET Switch power MOSFETs. It achieves 2A 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. Each channel can be independently 40A Shutdown Mode synchronized to a frequency up to 1.2MHz. Fixed 380KHz Frequency Thermal Shutdown Current mode operation provides fast transient response and eases loop stabilization. Cycle-by-Cycle Over Current Protection Wide 4.75V to 23V Operating Input Range Fault condition protection includes cycle-by-cycle Each Output Adjustable from 1.22V to 16V current limiting and thermal shutdown. In Configurable for Single Output with Double shutdown mode the regulator draws 40A of the Current supply current. Programmable Under Voltage Lockout The MP2362 requires a minimum number of Frequency Synchronization Input readily available standard external components. Available in TSSOP20 with Exposed Pad Package EVALUATION BOARD REFERENCE Board Number Dimensions APPLICATIONS EV2362DF-00A 2.2X x 1.6Y x 0.4Z Distributed Power Systems I/O and Core supplies 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 3.3V 2A Output Current Voltage 95 V = 5.0V 1 20 OUT SYNC CLOCK SYNCA ENA OFF ON 2 19 NC1 COMPA 3 18 10nF 90 V = 3.3V BSA FBA OUT 4 17 INA SGB 10nF 5 16 B230A SWA PGB V = 2.5V MP2362 OUT 85 6 15 PGA SWB 5V 2A B230A 7 14 SGA INB 10nF 8 13 FBB NC2 80 9 12 COMPB BSB 10 11 ENB SYNCB OFF ON 75 10nF V = 10V IN 70 0 0.5121.5 OUTPUT CURRENT (A) MP2362 Rev. 0.93 www.MonolithicPower.com 1 1/25/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved. EFFICIENCY (%)MP2362 DUAL 2A, 23V, 380KHZ STEP-DOWN CONVERTER (1) PACKAGE REFERENCE ABSOLUTE MAXIMUM RATINGS Supply Voltage ( )................................ 25V INA, INB TOP VIEW Switch Voltage ( ).............................. 26V SWA, SWB Bootstrap Voltage ( ) .................. V + 6V BSA, BSB SW SYNCA 1 20 ENA Feedback Voltage ( ) ............0.3V to +6V FBA, FBB NC1 2 19 COMPA Enable/UVLO Voltage ( ) .....0.3V to +6V ENA, ENB Comp Voltage ( ) ..........0.3V to +6V BSA 3 18 FBA COMPA, COMPB SYNC Voltage ( ) ...........0.3V to +6V SYNCA, SYNCB INA 4 17 SGB Junction Temperature.............................+150C SWA 5 16 PGB Lead Temperature ..................................+260C PGA 6 15 SWB Storage Temperature ..............65C to +150C SGA 7 14 INB (2) Recommended Operating Conditions FBB 8 13 NC2 Supply Voltage (V ) ...................... 4.75V to 23V IN COMPB 9 12 BSB Operating Temperature.................40C to +85 C ENB 10 11 SYNCB (3) Thermal Resistance JA JC EXPOSED PAD TSSOP20F ............................. 40....... 6.... C/W 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. MP2362DF TSSOP20F 40 C to +85C For Tape & Reel, add suffix Z (eg. MP2362DFZ) * For RoHS compliant packaging, add suffix LF (eg. MP2362DFLFZ) ELECTRICAL CHARACTERISTICS V = 12V, T = +25 C, unless otherwise noted. IN A Parameter Symbol Condition Min Typ Max Units Feedback Voltage V 1.198 1.222 1.246 V 4.75V V 23V FB IN Upper Switch-On Resistance R 0.18 DS(ON)1 Lower Switch-On Resistance R 10 DS(ON)2 Upper Switch Leakage V = 0V, V = 0V 10 A EN SW (4) Current Limit 2.4 3.4 A Current Limit Gain Output Current to Comp Pin G 1.95 A/V CS Voltage Error Amplifier Voltage Gain A 400 V/V VEA Error Amplifier G I = 10 A 500 770 1100 A/V EA C Transconductance Oscillator Frequency f 340 380 420 KHz OSC Short Circuit Frequency f V = 0V 20 35 54 KHz SC FB SYNC Frequency SYNC Drive = 0V to 2.7V 0.45 1.2 MHz MP2362 Rev. 0.93 www.MonolithicPower.com 2 1/25/2010 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2010 MPS. All Rights Reserved.