Datenblatt-Suchmaschine für elektronische Bauteile |
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LM34922 Datenblatt(PDF) 1 Page - Texas Instruments |
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LM34922 Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 19 page FB SW L1 RFB2 LM34922 BST CBST D1 CS RT VIN 6V to 28V Input CIN SS CSS RT SGND PGD CSG RS RPGD VPGD COUT RFB1 VOUT Power Good LM34922 www.ti.com SNVS813A – JUNE 2012 – REVISED MARCH 2013 LM34922 28V, 2A Constant On-Time Switching Regulator with Adjustable Current Limit Check for Samples: LM34922 1 FEATURES • Thermal Shutdown • Precision 2% Feedback Reference 2 • Input Operating Voltage Range: 6V to 28V • Absolute Maximum Input Rating: 30V DESCRIPTION • Integrated 2A N-Channel Buck Switch The LM34922 Constant On-time Step-Down • Adjustable Current Limit Allows for Smaller Switching Regulator features all the functions needed Inductor to implement a low cost, efficient, buck bias regulator capable of supplying up to 2A of load current. This • Adjustable Output Voltage from 2.51V voltage regulator contains an N-Channel Buck switch, • Minimum Ripple Voltage at VOUT a startup regulator, current limit detection, and • Power Good Output internal ripple control. The constant on-time regulation principle requires no loop compensation, • Switching Frequency Adjustable to 1MHz results in fast load transient response, and simplifies • COT Topology Features: circuit implementation. The operating frequency – Switching Frequency Remains Nearly remains constant with line and load. The adjustable Constant with Load Current and Input valley current limit detection results in a smooth Voltage Variations transition from constant voltage to constant current mode when current limit is reached, without the use – Ultra-Fast Transient Response of current limit foldback. The PGD output indicates – No Loop Compensation Required the output voltage has increased to within 5% of the – Stable Operation with Ceramic Output expected regulation value. Additional features Capacitors include: Low output ripple, VIN under-voltage lock- out, adjustable soft-start timing, thermal shutdown, – Allows for Smaller Output Capacitor and gate drive pre-charge, gate drive under-voltage lock- Current Sense Resistor out, and maximum duty cycle limit. • Adjustable Soft-Start Timing 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 © 2012–2013, 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. |
Ähnliche Teilenummer - LM34922_15 |
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Ähnliche Beschreibung - LM34922_15 |
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