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LM2675EP Datasheet(PDF) 1 Page - National Semiconductor (TI) |
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LM2675EP Datasheet(HTML) 1 Page - National Semiconductor (TI) |
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1 / 25 page  LM2675EP Enhanced Plastic SIMPLE SWITCHER® Power Converter High Efficiency 1A Step-Down Voltage Regulator General Description The LM2675EP series of regulators are monolithic inte- grated circuits built with a LMDMOS process. These regula- tors provide all the active functions for a step-down (buck) switching regulator, capable of driving a 1A load current with excellent line and load regulation. These devices are avail- able in fixed output voltages of 3.3V, 5.0V, 12V, and an adjustable output version. Requiring a minimum number of external components, these regulators are simple to use and include patented internal frequency compensation (Patent Nos. 5,382,918 and 5,514,947) and a fixed frequency oscillator. The LM2675EP series operates at a switching frequency of 260 kHz, thus allowing smaller sized filter components than what would be needed with lower frequency switching regu- lators. Because of its very high efficiency (>90%), the cop- per traces on the printed circuit board are the only heat sinking needed. A family of standard inductors for use with the LM2675EP are available from several different manufacturers. This fea- ture greatly simplifies the design of switch-mode power sup- plies using these advanced ICs. Also included in the datasheet are selector guides for diodes and capacitors designed to work in switch-mode power supplies. Other features include a guaranteed ±1.5% tolerance on output voltage within specified input voltages and output load conditions, and ±10% on the oscillator frequency. Ex- ternal shutdown is included, featuring typically 50 µA stand-by current. The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions. To simplify the LM2675EP buck regulator design procedure, there exists computer design software, LM267X Made Simple version 6.0. ENHANCED PLASTIC • Extended Temperature Performance of−40˚C to +125˚C • Baseline Control - Single Fab & Assembly Site • Process Change Notification (PCN) • Qualification & Reliability Data • Solder (PbSn) Lead Finish is standard • Enhanced Diminishing Manufacturing Sources (DMS) Support Features n Efficiency up to 96% n Available in SO-8, 8-pin DIP and LLP packages n Computer Design Software LM267X Made Simple (version 6.0) n Simple and easy to design with n Requires only 5 external components n Uses readily available standard inductors n 3.3V, 5.0V, 12V, and adjustable output versions n Adjustable version output voltage range: 1.21V to 37V n ± 1.5% max output voltage tolerance over line and load conditions n Guaranteed 1A output load current n 0.25 Ω DMOS Output Switch n Wide input voltage range: 8V to 40V n 260 kHz fixed frequency internal oscillator n TTL shutdown capability, low power standby mode n Thermal shutdown and current limit protection Typical Applications n Simple High Efficiency (>90%) Step-Down (Buck) Regulator n Efficient Pre-Regulator for Linear Regulators n Positive-to-Negative Converter n Selected Military Applications n Selected Avionics Applications Ordering Information PART NUMBER VID PART NUMBER NS PACKAGE NUMBER (Note 3) LM2675MX-ADJEP V62/04630-01 M08A (Notes 1, 2) TBD TBD Note 1: For the following (Enhanced Plastic) versions, check for availability: LM2675LD-12EP, LM2675LDX-12EP, LM2675LD-3.3EP, LM2675LDX-3.3EP, LM2675LD-5.0EP, LM2675LDX-5.0EP, LM2675LD-ADJEP, LM2675LDX-ADJEP, LM2675M-12EP, LM2675MX-12EP, LM2675M-3.3EP, LM2675MX-3.3EP, LM2675M-5.0EP, LM2675MX-5.0EP, LM2675M-ADJEP, LM2675N-12EP, LM2675N-3.3EP, LM2675N-5.0EP, LM2675N-ADJEP. Parts listed with an "X" are provided in Tape & Reel and parts without an "X" are in Rails. Note 2: FOR ADDITIONAL ORDERING AND PRODUCT INFORMATION, PLEASE VISIT THE ENHANCED PLASTIC WEB SITE AT: www.national.com/ mil Note 3: Refer to package details under Physical Dimensions SIMPLE SWITCHER® is a registered trademark of National Semiconductor Corporation. Windows® is a registered trademark of Microsoft Corporation. May 2004 © 2004 National Semiconductor Corporation DS200994 www.national.com |
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