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LM3488MMX Datasheet(PDF) 1 Page - Texas Instruments |
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LM3488MMX Datasheet(HTML) 1 Page - Texas Instruments |
1 / 33 page LM3488 LM3488-Q1 www.ti.com SNVS089M – JULY 2000 – REVISED MARCH 2013 High Efficiency Low-Side N-Channel Controller for Switching Regulators Check for Samples: LM3488, LM3488-Q1 1 FEATURES DESCRIPTION The LM3488 is a versatile Low-Side N-FET high 2 • LM3488Q is AEC-Q100 qualified and performance controller for switching regulators. It is manufactured on an Automotive Grade Flow suitable for use in topologies requiring low side FET, • 8-lead VSSOP package such as boost, flyback, or SEPIC. Moreover, the • Internal push-pull driver with 1A peak current LM3488 can be operated at extremely high switching frequency in order to reduce the overall solution size. capability The switching frequency of LM3488 can be adjusted • Current limit and thermal shutdown to any value between 100kHz and 1MHz by using a • Frequency compensation optimized with a single external resistor or by synchronizing it to an capacitor and a resistor external clock. Current mode control provides superior bandwidth and transient response, besides • Internal softstart cycle-by-cycle current limiting. Output current can be • Current Mode Operation programmed with a single external resistor. • Undervoltage Lockout with hysteresis The LM3488 has built in features such as thermal shutdown, short-circuit protection and over voltage APPLICATIONS protection. Power saving shutdown mode reduces the • Distributed Power Systems total supply current to 5µA and allows power supply sequencing. Internal soft-start limits the inrush current • Notebook, PDA, Digital Camera, and other at start-up. Portable Applications • Offline Power Supplies KEY SPECIFICATIONS • Set-Top Boxes • Wide supply voltage range of 2.97V to 40V • 100kHz to 1MHz Adjustable and Synchronizable clock frequency • ±1.5% (over temperature) internal reference • 5µA shutdown current (over temperature) TYPICAL APPLICATION CIRCUIT Figure 1. Typical SEPIC Converter 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 © 2000–2013, 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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