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SM74301 Scheda tecnica(PDF) 1 Page - Texas Instruments |
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SM74301 Scheda tecnica(HTML) 1 Page - Texas Instruments |
1 / 16 page RT/SD FB VIN SW RTN BST 6V - 95V Input SM74301 SHUTDOWN RCL VCC VIN GND RCL RT C1 C3 C4 L1 D1 RFB2 RFB1 R3 C2 GND VOUT SM74301 www.ti.com SNVS719A – JULY 2011 SM74301 100V, 350 mA Constant On-Time Buck Switching Regulator Check for Samples: SM74301 1 FEATURES PACKAGE 2 • Renewable Energy Grade • VSSOP-8 • Operating Input Voltage Range: 6V to 95V • WSON-8 (4mm x 4mm) • Integrated 100V, N-Channel Buck Switch DESCRIPTION • Internal Start-Up Regulator The SM74301 is a Constant On-Time (COT) Buck • No Loop Compensation Required Switching Regulator which operates at a low • Ultra-Fast Transient Response minimum input voltage of 6V and does not require a minimum load current as some other COT parts. • On Time Varies Inversely with Input Voltage • Operating Frequency Remains Constant with The SM74301 Step Down Switching Regulator Varying Line Voltage and Load Current features all of the functions needed to implement a low cost, efficient, Buck bias regulator. This high • Adjustable Output Voltage from 2.5V voltage regulator contains a 100V N-Channel Buck • Highly Efficient Operation Switch. The device is easy to implement and is • Precision Internal Reference provided in the VSSOP-8 and the thermally enhanced WSON-8 packages. The regulator is based on a • Low Bias Current control scheme using an ON time inversely • Intelligent Current Limit proportional to VIN. This feature allows the operating • Thermal Shutdown frequency to remain relatively constant. The control scheme requires no loop compensation. An intelligent current limit is implemented with forced OFF time, TYPICAL APPLICATIONS which is inversely proportional to Vout. This scheme • High Voltage Photovoltaic Systems ensures short circuit control while providing minimum • Non-Isolated Telecommunication Buck foldback. Other features include: Thermal Shutdown, Regulator VCC under-voltage lockout, Gate drive under-voltage lockout, Max Duty Cycle limiter, and a pre-charge • Secondary High Voltage Post Regulator switch. Typical Application, Basic Step-Down Regulator 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 © 2011, 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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