MP1580HP-LF Monolithic Power Systems

TM MP1580 2A, 380 KHz Step-Down Converter TM The Future of Analog IC Technology DESCRIPTION FEATURES The MP1580 is a monolithic step-down switch 2A Output Current mode converter with a built in internal power 0.18 Internal Power MOSFET Switch MOSFET. It achieves 2A continuous output Stable with Low ESR Output Ceramic current over a wide input supply range with Capacitors excellent load and line regulation. Up to 95% Efficiency 23 A Shutdown Mode Current mode operation provides fast transient Fixed 380KHz Frequency response and eases loop stabilization. Thermal Shutdown Fault condition protection includes cycle-by-cycle Cycle-by-Cycle Over Current Protection current limiting and thermal shutdown. In Wide 4.75 to 25V Operating Input Range shutdown mode the regulator draws 23A of Output Adjustable from 1.22V to 21V supply current. Programmable Under Voltage Lockout The MP1580 requires a minimum number of Frequency Synchronization Input readily available standard external components. A Available in an 8-Pin SO Package synchronization pin allows the part to be driven to 600KHz. APPLICATIONS Distributed Power Systems EVALUATION BOARD REFERENCE Battery Chargers Board Number Dimensions Pre-Regulator for Linear Regulators EV0007 2.3X x 1.5Y x 0.5Z MPS and The Future of Analog IC Technology are Trademarks of Monolithic Power Systems, Inc. TYPICAL APPLICATION Efficiency vs C5 10nF Output Current Voltage INPUT 95 4.75V to 25V V = 5.0V OUT 2 1 IN BS 90 V = 3.3V 7 3 OUT OUTPUT EN SW OFF ON 2.5V / 2A D1 MP1580 V = 2.5V OUT 85 8 5 OPEN SYNC FB NOT USED GND COMP 80 4 6 C3 75 2.2nF C6 OPEN V = 10V IN 70 0 0.5121.5 OUTPUT CURRENT (A) MP1580 TAC S01 MP1580 TAC EC01 MP1580 Rev. 3.0 www.MonolithicPower.com 1 10/10/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2007 MPS. All Rights Reserved. EFFICIENCY (%)TM MP1580 2A, 380KHz STEP-DOWN CONVERTER PACKAGE REFERENCE TOP VIEW TOP VIEW BS 1 8 SYNC BS 1 8 SYNC IN 2 7 EN IN 2 7 EN SW 3 6 COMP SW 3 6 COMP GND 4 5 FB GND 4 5 FB MP1580 PD01-SOIC8 MP1580 PD02-PDIP8 Part Number* Package Temperature Part Number** Package Temperature MP1580HS SOIC8 MP1580HP PDIP8 40 C to +125 C 40 C to +125 C For Tape & Reel, add suffix Z (eg. MP1580HSZ) For Tape & Reel, add suffix Z (eg. MP1580HPZ) * ** For Lead Free, add suffix LF (eg. MP1580HS LFZ) For Lead Free, add suffix LF (eg. MP1580HP LFZ) (1) (2) ABSOLUTE MAXIMUM RATINGS Recommended Operating Conditions Supply Voltage (V )..................................... 27V Input Voltage (V ) ......................... 4.75V to 25V IN IN Switch Voltage (V ).................. 1V to V + 1V Operating Temperature...............40 C to +125 C SW IN Bootstrap Voltage (V ) ....................... V + 6V BS SW (3) Thermal Resistance JA JC Feedback Voltage (V ) .................0.3V to +6V FB SOIC8.................................... 105..... 50... C/W Enable/UVLO Voltage (V )...........0.3V to +6V EN PDIP8 ..................................... 95...... 55... C/W Comp Voltage (V ) ...................0.3V to +6V COMP Sync Voltage (V )......................0.3V to +6V SYNC Notes: Junction Temperature.............................+150C 1) Exceeding these ratings may damage the device. 2) The device is not guaranteed to function outside of its Lead Temperature ..................................+260C operating conditions. Storage Temperature.............. 65C to +150C 3) Measured on approximately 1 square of 1 oz copper. ELECTRICAL CHARACTERISTICS V = 12V, T = +25 C, unless otherwise noted. IN A Parameter SymbolCondition Min Typ Max Units 4.75V V 25V IN Feedback Voltage 1.198 1.222 1.246 V V < 2V COMP Upper Switch-On Resistance 0.18 Lower Switch-On Resistance 10 Upper Switch Leakage V = 0V, V = 0V 0 10 A EN SW (4) Current Limit 2.4 3.0 3.6 A Current Limit Gain. 1.95 A/V Output Current to Comp Pin Voltage Error Amplifier Voltage Gain 400 V/V Error Amplifier Transconductance I = 10 A 500 770 1100 A/V C Oscillator Frequency 342 380 418 KHz Short Circuit Frequency V = 0V 20 35 54 KHz FB Sync Frequency Sync Drive 0V to 2.7V 445 600 KHz MP1580 Rev. 3.0 www.MonolithicPower.com 2 10/10/2007 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. 2007 MPS. All Rights Reserved.