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LM34910 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM34910 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 17 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 SNVS297A – OCTOBER 2004 – REVISED FEBRUARY 2005 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 package. • Ultra-Fast Transient Response The hysteretic regulation scheme requires no loop • Operating Frequency Remains Constant with compensation, results in fast load transient response, Load Current and Input Voltage and simplifies circuit implementation. The operating frequency remains constant with line and load • Maximum Duty Cycle Limited During Start-Up variations due to the inverse relationship between the • Adjustable Output Voltage input voltage and the on-time. The current limit • Valley Current Limit At 1.25A detection is set at 1.25A. Additional features include: VCC under-voltage lockout, thermal shutdown, gate • Precision Internal Reference drive under-voltage lockout, and maximum duty cycle • Low Bias Current limiter. • Highly Efficient Operation • Thermal Shutdown Package • WSON (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 © 2004–2005, 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. |
Podobny numer części - LM34910_14 |
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Podobny opis - LM34910_14 |
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