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LM3000 データシート(PDF) 1 Page - Texas Instruments |
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LM3000 データシート(HTML) 1 Page - Texas Instruments |
1 / 41 page LM3000 www.ti.com SNVS612B – JULY 2009 – REVISED APRIL 2013 LM3000 Dual Synchronous Emulated Current-Mode Controller Check for Samples: LM3000 1 FEATURES DESCRIPTION The LM3000 is a dual output synchronous buck 2 • VIN Range FROM 3.3V to 18.5V controller which is designed to convert input voltages • Output Voltage From 0.6V to 80% of VIN ranging from 3.3V to 18.5V down to output voltages • Remote Differential Output Voltage Sensing as low as 0.6V. The two outputs switch at a constant programmable frequency of 200 kHz to 1.5 MHz, with • 1% Accuracy at FB Pin the second output 180 degrees out of phase from the • Interleaved Operation Reduces Input first to minimize the input filter requirements. The Capacitors switching frequency can also be phase locked to an • Frequency Sync/Adjust From 200 kHz to 1.5 external frequency. A CLKOUT provides an external MHz clock 90 degrees out of phase with the main clock so that a second chip can be run out of phase with the • Startup With Pre-Bias Load main chip. The emulated current-mode control utilizes • Independent Power Good, Enable, Soft-Start bottom side FET sensing to provide fast transient and Track response and current limit without the need for • Programmable Current Limit Without External external current sense resistors or RC networks. Separate Enable, Soft-Start and Track pins allow Sense Resistor each output to be controlled independently to provide • Hiccup Mode Short Circuit Protection maximum flexibility in designing system power sequencing. APPLICATIONS The LM3000 has a full range of protection features • DC Power Distribution Systems which include input under-voltage lock-out (UVLO), • Graphic Cards - GPU and Memory ICs power good (PGOOD) signals for each output, over- voltage crowbar and hiccup mode during short circuit • FPGA, CPLD, and ASICs events. • Embedded Processor • 1.8V and 2.5V I/O Supplies • Networking Equipment (Routers, Hubs) 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 © 2009–2013, 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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同様の説明 - LM3000 |
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