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LM3102 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM3102 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 24 page LM3102 www.ti.com SNVS515G – SEPTEMBER 2007 – REVISED JANUARY 2012 LM3102/LM3102Q SIMPLE SWITCHER Synchronous 1MHz 2.5A Step-Down Voltage Regulator Check for Samples: LM3102 1 FEATURES • Output over-voltage protection • Precision internal reference for an adjustable 2 • LM3102Q is an automotive grade product that output voltage down to 0.8V is AEC-Q100 grade 1 qualified (-40°C to +125°C operating junction temperature) • Thermal shutdown • Low component count and small solution size TYPICAL APPLICATIONS • Stable with ceramic and other low ESR capacitors • 5VDC, 12VDC, 24VDC, 12VAC, and 24VAC systems • No loop compensation required • Embedded Systems • High efficiency at a light load by DCM operation • Industrial Control • Pre-bias startup • Automotive Telematics and Body Electronics • Ultra-fast transient response • Point of Load Regulators • Programmable soft-start • Storage Systems • Programmable switching frequency up to 1 • Broadband Infrastructure MHz • Direct Conversion from 2/3/4 Cell Lithium • Valley current limit Batteries Systems DESCRIPTION The LM3102 Synchronously Rectified Buck Converter features all required functions to implement a highly efficient and cost effective buck regulator. It is capable of supplying 2.5A to loads with an output voltage as low as 0.8V. Dual N-Channel synchronous MOSFET switches allow a low component count, thus reducing complexity and minimizing board size. Different from most other COT regulators, the LM3102 does not rely on output capacitor ESR for stability, and is designed to work exceptionally well with ceramic and other very low ESR output capacitors. It requires no loop compensation, results in a fast load transient response and simple circuit implementation. The operating frequency remains nearly constant with line variations due to the inverse relationship between the input voltage and the on-time. The operating frequency can be externally programmed up to 1 MHz. Protection features include VCC under-voltage lock-out, output over-voltage protection, thermal shutdown, and gate drive under- voltage lock-out. The LM3102 is available in the thermally enhanced eTSSOP-20 package as well as a uSMD low profile chip-scale package with reduced output current. Table 1. Key Specifications VALUE UNIT Input voltage range 4.5V-42V 2.5A output current 0.8V, ±1.5% reference Integrated dual N-Channel main and synchronous MOSFETs Thermally enhanced eTSSOP-20 package 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 © 2007–2012, 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. |
Podobny numer części - LM3102_14 |
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Podobny opis - LM3102_14 |
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