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LM5085-Q1 Datasheet(PDF) 1 Page - Texas Instruments |
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LM5085-Q1 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 33 page FB LM5085 PGATE ISEN GND VCC ADJ 4.5V to 75V 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 LM5085, LM5085-Q1 SNVS565I – NOVEMBER 2008 – REVISED AUGUST 2015 LM5085/-Q1 75-V Constant On-Time PFET Buck Switching Controller 1 Features 3 Description The LM5085 is a high efficiency PFET switching 1 • LM5085-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 4.5-V to 75-V 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 4.5-V to 75-V 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 • No Loop Compensation Required ultrafast load transient response. The operating • Ultra-Fast Transient Response frequency remains nearly constant with line and load variations due to the inverse relationship between the • Nearly Constant Operating Frequency with Line input voltage and the on-time. The PFET architecture and Load Variations allows 100% duty cycle operation for a low dropout • Adjustable Output Voltage from 1.25 V 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 VSSOP (8) • Package: LM5085 HVSSOP (8) 3.00 mm x 3.00 mm – HVSSOP-8 WSON (8) LM5085-Q1 HVSSOP (8) 3.00 mm x 3.00 mm – VSSOP-8 – WSON-8 (1) For all available packages, see the orderable addendum at the end of the datasheet. 2 Applications • Automotive Infotainment • Battery/Super Capacitor Chargers • LED Drivers Typical Application, Basic Step Down Controller 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. |
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