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LM34910SD Datasheet(PDF) 1 Page - Texas Instruments |
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LM34910SD Datasheet(HTML) 1 Page - Texas Instruments |
1 / 18 page BST ISEN SGND RTN RON/SD SS FB SW 1 2 3 4 5 10 9 8 7 6 VCC VIN LM34910 www.ti.com SNVS297B – OCTOBER 2004 – REVISED MARCH 2013 LM34910 High Voltage (40V, 1.25A) Step Down Switching Regulator Check for Samples: LM34910 1 FEATURES DESCRIPTION The LM34910 Step Down Switching Regulator 2 • Integrated 40V, N-Channel Buck Switch features all of the functions needed to implement a • Integrated Start-Up Regulator low cost, efficient, buck bias regulator capable of • Input Voltage Range: 8V to 36V supplying 1.25A to the load. This buck regulator contains a 40V N-Channel Buck Switch, and is • No Loop Compensation Required available in the thermally enhanced WSON-10 • Ultra-Fast Transient Response package. The hysteretic regulation scheme requires • Operating Frequency Remains Constant with no loop compensation, results in fast load transient Load Current and Input Voltage response, and simplifies circuit implementation. The operating frequency remains constant with line and • Maximum Duty Cycle Limited During Start-Up load variations due to the inverse relationship • Adjustable Output Voltage between the input voltage and the on-time. The • Valley Current Limit At 1.25A current limit detection is set at 1.25A. Additional features include: VCC under-voltage lockout, thermal • Precision Internal Reference shutdown, gate drive under-voltage lockout, and • Low Bias Current maximum duty cycle limiter. • Highly Efficient Operation • Thermal Shutdown Package • WSON-10 (4 mm x 4 mm) TYPICAL APPLICATIONS • Exposed Thermal Pad For Improved Heat Dissipation • High Efficiency Point-Of-Load (POL) Regulator • Non-Isolated Telecommunication Buck Regulator • Secondary High Voltage Post Regulator Connection Diagram Figure 1. 10-Lead WSON See DPR0010A 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 © 2004–2013, 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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