Datenblatt-Suchmaschine für elektronische Bauteile |
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LM25085MYX Datenblatt(PDF) 1 Page - Texas Instruments |
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LM25085MYX Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 30 page FB LM25085 PGATE ISEN GND VCC ADJ 4.5V to 42V Input VIN GND SHUTDOWN CIN RT CVCC CADJ RADJ Q1 D1 L1 Cff COUT RFB2 RFB1 VOUT GND VIN RT LM25085, LM25085-Q1 www.ti.com SNVS593H – OCTOBER 2008 – REVISED MARCH 2013 LM25085, LM25085-Q1 42V Constant On-Time PFET Buck Switching Controller Check for Samples: LM25085, LM25085-Q1 1 FEATURES PACKAGE 2 • LM25085-Q1 is an Automotive Grade product • HVSSOP-8 that is AEC-Q100 Grade 1 Qualified (-40°C to • VSSOP-8 125°C Operating Junction Temperature) • WSON-8 (3mm x 3mm) • Wide 4.5V to 42V Input Voltage Range • Adjustable Current Limit Using RDS(ON) or a DESCRIPTION Current Sense Resistor The LM25085 is a high efficiency PFET switching regulator controller that can be used to quickly and • Programmable Switching Frequency to 1MHz easily develop a small, efficient buck regulator for a • No Loop Compensation Required wide range of applications. This high voltage • Ultra-Fast Transient Response controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide • Nearly Constant Operating Frequency with 4.5V to 42V input range. The constant on-time Line and Load Variations regulation principle requires no loop compensation, • Adjustable Output Voltage from 1.25V simplifies circuit implementation, and results in ultra- • Precision ±2% Feedback Reference fast load transient response. The operating frequency remains nearly constant with line and load variations • Capable of 100% Duty Cycle Operation due to the inverse relationship between the input • Internal Soft-Start Timer voltage and the on-time. The PFET architecture • Integrated High Voltage Bias Regulator allows 100% duty cycle operation for a low dropout voltage. Either the RDS(ON) of the PFET or an external • Thermal Shutdown sense resistor can be used to sense current for over- current detection. Typical Application, Basic Step Down Controller 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 © 2008–2013, 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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