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LM25085 датащи(PDF) 1 Page - Texas Instruments |
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LM25085 датащи(HTML) 1 Page - Texas Instruments |
1 / 34 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 Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM25085, LM25085-Q1 SNVS593J – OCTOBER 2008 – REVISED NOVEMBER 2014 LM25085 / -Q1 42V Constant On-Time PFET Buck Switching Controller 1 Features 3 Description The LM25085 is a high efficiency PFET switching 1 • LM25085-Q1 is an Automotive Grade product that regulator controller that can be used to quickly and is AEC-Q100 Grade 1 Qualified (-40°C to 125°C easily develop a small, efficient buck regulator for a Operating Junction Temperature) wide range of applications. This high voltage • Wide 4.5V to 42V Input Voltage Range controller contains a PFET gate driver and a high voltage bias regulator which operates over a wide • Adjustable Current Limit Using RDS(ON) or a 4.5V to 42V input range. The constant on-time Current Sense Resistor regulation principle requires no loop compensation, • Programmable Switching Frequency to 1MHz simplifies circuit implementation, and results in ultra- • No Loop Compensation Required fast load transient response. The operating frequency • Ultra-Fast Transient Response remains nearly constant with line and load variations due to the inverse relationship between the input • Nearly Constant Operating Frequency with Line voltage and the on-time. The PFET architecture and Load Variations allows 100% duty cycle operation for a low dropout • Adjustable Output Voltage from 1.25V voltage. Either the RDS(ON) of the PFET or an external • Precision ±2% Feedback Reference sense resistor can be used to sense current for over- current detection. • Capable of 100% Duty Cycle Operation • Internal Soft-Start Timer Device Information(1) • Integrated High Voltage Bias Regulator PART NUMBER PACKAGE BODY SIZE (NOM) • Thermal Shutdown LM25085-Q1 HVSSOP (8) 3.00 mm x 3.00 mm VSSOP (8) 3.00 mm x 3.00 mm 2 Applications LM25085 WSON (8) 3.00 mm x 3.00 mm • Automotive Infotainment HVSSOP (8) 3.00 mm x 3.00 mm • Battery/Super Capacitor Chargers (1) For all available packages, see the orderable addendum at the end of the datasheet. • LED Drivers Simplified Schematic 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
Аналогичный номер детали - LM25085_15 |
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Аналогичное описание - LM25085_15 |
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