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LM34919C-Q1 Datasheet(PDF) 1 Page - Texas Instruments |
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LM34919C-Q1 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 29 page VIN SW BST LM34919C VCC SS RON 4.5V - 50V Input VOUT RTN ISEN SGND FB PGD EN PGD VOUT C1 C5 RON REN RPGD C3 C4 L1 R3 C2 R2 R1 D1 C6 LM34919C-Q1 www.ti.com SNVS831A – SEPTEMBER 2013 – REVISED DECEMBER 2013 LM34919C-Q1 Ultra Small 50V, 600 mA Constant On-Time Buck Switching Regulator Check for Samples: LM34919C-Q1 1 FEATURES APPLICATIONS 2 • AEC-Q100 qualified (Tj = -40°C to 125°C) • Automotive Safety and Infotainment • Maximum Switching Frequency: 2.6 MHz • High Efficiency Point-of-Load (POL) Regulator • Input Voltage Range: 4.5 V to 50 V • Telecommunication Buck Regulator • Integrated N-Channel buck switch • Secondary Side Post Regulator • Integrated Start-Up Regulator DESCRIPTION • No Loop Compensation Required The LM34919C 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 0.6 A to the load. This buck regulator contains an N-Channel Buck Switch and is available • Adjustable Output Voltage in DSBGA and WSON packages. The constant on- • Power Good Output time feedback regulation scheme requires no loop • Enable Input compensation, results in fast load transient response, and simplifies circuit implementation. The operating • Valley Current Limit at 0.64 A Typical frequency remains constant with line and load • Precision Internal Voltage Reference variations due to the inverse relationship between the • Low IQ Shutdown (<10 µA) input voltage and the on-time. The valley current limit results in a smooth transition from constant voltage to • Highly Efficient Operation constant current mode when current limit is detected, • Thermal Shutdown reducing the frequency and output voltage, without • 12-Bump 2 mm x 2 mm DSBGA and 12-pin 4 the use of foldback. Additional features include: mm x 4 mm WSON Packages Power Good, enable, VCC undervoltage lockout, thermal shutdown, gate drive undervoltage lockout, and maximum duty cycle limiter. Figure 1. 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 © 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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