lmr62014升压稳压芯片datasheet.doc

捷 多 邦 ， 您 值 得 信 赖 的 PC B打 样 专 家 ！ LMR62014 SNVS735B –OCTOBER 2011–REVISED APRIL 2013 LMR62014 SI MPLE SWI TCHER?20Vout, 1.4A Step-Up Voltage Regulator in SOT-23 Check for Samples: LMR62014 FEATURES DESCRIPTION The LMR62014 switching regulator is a current-mode ? Input Voltage Range of 2.7V to 14V boost converter operating at fixed frequency of ? Output Voltage up to 20V 1.6 MHz. ? Switch Current up to 1.4A The use of SOT-23 package, made possible by the ? 1.6 MHz Switching Frequency minimal power loss of the internal 1.4A switch, and ? Low Shutdown Iq, 1 μA use of small inductors and capacitors result in the industrys highest power density. The LMR62014 is ? Cycle-by-Cycle Current Limiting capable of greater than 90% duty cycle, making it ? Internally Compensated ideal for boosting to voltages up to 20V. ? 5-Pin SOT-23 Packaging (2.92 x 2.84 x 1.08mm) These parts have a logic-level shutdown pin that can ? Fully Enabled for WEBENCH? Power Designer be used to reduce quiescent current and extend battery life. PERFORMANCE BENEFITS Protection is provided through cycle-by-cycle current ? Extremely Easy to Use limiting and thermal shutdown. Internal compensation ? Tiny Overall Solution Reduces System Cost simplifies design and reduces component count. APPLICATIONS ? Boost Conversions from 3.3V, 5V, and 12V Rails ? Space Constrained Applications ? Embedded Systems ? LCD Displays ? LED Applications System Performance Efficiency vs Load Current Efficiency vs Load Current VIN = 3.3V, VOUT = 12V VIN = 5V, VOUT = 12V 80 100 70 60 90 50 40 30 80 20 10 0 0 20 40 60 80 100 120 140 160 70 0 100 200 300 400 500 LOAD CURRENT (mA) LOAD (mA) Please be aware that an important notice concerning availability, standard warranty, and use in critical applications of Texas Instruments semiconductor products and disclaimers thereto appears at the end of this data sheet. SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments. All other trademarks are the property of their