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LM34919B-Q1 Datasheet(PDF) 1 Page - Texas Instruments |
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LM34919B-Q1 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 27 page VIN SW BST LM34919B VCC SS RON/SD 6V - 40V Input C1 RON R2 R1 C2 VOUT L1 C3 C4 D1 C6 RTN ISEN SGND FB SHUTDOWN R3 LM34919B LM34919B-Q1 www.ti.com SNVS623B – MAY 2010 – REVISED JULY 2013 LM34919B Ultra-Small 40-V 600-mA Constant On-Time Buck Switching Regulator Check for Samples: LM34919B, LM34919B-Q1 1 FEATURES TYPICAL APPLICATIONS 2 • AEC-Q100 Grade 1 Qualified (-40°C to 125°C) • Automotive Safety and Infotainment • Maximum Switching Frequency: 2.6 MHz • High Efficiency Point-Of-Load (POL) Regulator (VIN=14V,Vo=3.3V) • Non-Isolated Telecommunication Buck • Input Voltage Range: 6V to 40V Regulator • Integrated N-Channel Buck Switch • Secondary High Voltage Post Regulator • Integrated Startup Regulator DESCRIPTION • No loop compensation Required The LM34919B Step-Down Switching Regulator • Ultra-Fast transient Response features all of the functions needed to implement a • Operating frequency remains constant with low cost, efficient, buck bias regulator capable of Load Current and Input Voltage supplying 0.6A to the load. This buck regulator contains an N-Channel Buck Switch, and is available • Maximum Duty Cycle Limited During Startup in a 10-pin DSBGA package. The constant on-time • Adjustable Output Voltage feedback regulation scheme requires no loop • Valley Current Limit At 0.64A compensation, results in fast load transient response, and simplifies circuit implementation. The operating • Precision Internal Reference frequency remains constant with line and load • Low Bias Current variations due to the inverse relationship between the • Highly Efficient Operation input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to • Thermal Shutdown constant current mode when current limit is detected, • 10-Pin DSBGA Package reducing the frequency and output voltage, without the use of foldback. Additional features include: VCC under-voltage lockout, thermal shutdown, gate drive under-voltage lockout, and maximum duty cycle limiter. 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 © 2010–2013, 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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