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LM2672LDX-12 Datasheet(PDF) 1 Page - Texas Instruments |
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LM2672LDX-12 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 16 page Efficiency vs Load Current LOAD CURRENT (mA) 3.3 -5V Boost ^z_ s Œ•]}v 0 200 400 600 800 70 80 90 100 LM2731 ³<´ SW FB GND VIN SHDN U1 R3 51K SHDN GND 3.3 VIN C1 2.2PF R2 13.3K CF 470pF D1 MBR0520 R1/40.5K L1/6.8PH C2 22PF 5V OUT 700mA (TYP) Efficiency vs Load Current LOAD CURRENT (mA) 0 100 200 300 400 70 80 90 100 LM2731 ³;´ SW FB GND VIN SHDN U1 R3 51K SHDN GND 5 VIN C1 2.2PF R2 13.3K CF 220pF D1 MBR0520 R1/117K L1/10PH C2 4.7PF 12V OUT 500mA (TYP) 500 5 - 12V Boost ^y_ s Œ•]}v TI Confidential - NDA Restrictions LM2731 www.ti.com SNVS217F – MAY 2004 – REVISED NOVEMBER 2012 LM2731 0.6/1.6 MHz Boost Converters With 22V Internal FET Switch in SOT-23 Check for Samples: LM2731 1 FEATURES DESCRIPTION The LM2731 switching regulators are current-mode 2 • 22V DMOS FET Switch boost converters operating at fixed frequencies of 1.6 • 1.6 MHz (“X”), 0.6 MHz (“Y”) Switching MHz (“X” option) and 600 kHz (“Y” option). Frequency The use of SOT-23 package, made possible by the • Low RDS(ON) DMOS FET minimal power loss of the internal 1.8A switch, and • Switch Current up to 1.8A use of small inductors and capacitors result in the industry's highest power density. The 22V internal • Wide Input Voltage Range (2.7V–14V) switch makes these solutions perfect for boosting to • Low Shutdown Current (<1 µA) voltages up to 20V. • 5-Lead SOT-23 Package These parts have a logic-level shutdown pin that can • Uses Tiny Capacitors and Inductors be used to reduce quiescent current and extend • Cycle-by-Cycle Current Limiting battery life. • Internally Compensated Protection is provided through cycle-by-cycle current limiting and thermal shutdown. Internal compensation APPLICATIONS simplifies design and reduces component count. • White LED Current Source Table 1. Switch Frequency • PDA’s and Palm-Top Computers X Y • Digital Cameras 1.6 MHz 0.6 MHz • Portable Phones and Games • Local Boost Regulator Typical Application Circuit 1 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. 2 All trademarks are the property of their respective owners. PRODUCTION DATA information is current as of publication date. Copyright © 2004–2012, Texas Instruments Incorporated Products conform to specifications per the terms of the Texas Instruments standard warranty. Production processing does not necessarily include testing of all parameters. |
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