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LM22671MRE-50 Fiches technique(PDF) 1 Page - Texas Instruments |
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LM22671MRE-50 Fiches technique(HTML) 1 Page - Texas Instruments |
1 / 25 page LM22671 www.ti.com SNVS589M – SEPTEMBER 2008 – REVISED APRIL 2013 LM22671/LM22671-Q1 42V, 500mA SIMPLE SWITCHER® Step-Down Voltage Regulator with Features Check for Samples: LM22671 1 FEATURES DESCRIPTION The LM22671 switching regulator provides all of the 2 • Wide Input Voltage Range: 4.5V to 42V functions necessary to implement an efficient high • Internally Compensated Voltage Mode Control voltage step-down (buck) regulator using a minimum • Stable with Low ESR Ceramic capacitors of external components. This easy to use regulator incorporates a 42V N-channel MOSFET switch • 200 m Ω N-Channel MOSFET capable of providing up to 500mA of load current. • Output Voltage Options: Excellent line and load regulation along with high – ADJ (Outputs as Low as 1.285V) efficiency (>90%) are featured. Voltage mode control offers short minimum on-time, allowing the widest – 5.0 (Output Fixed to 5V) ratio between input and output voltages. Internal loop • ±1.5% Feedback Reference Accuracy compensation means that the user is free from the • 500 kHz Default Switching Frequency tedious task of calculating the loop compensation components. Fixed 5V output and adjustable output • Adjustable Switching Frequency and voltage options are available. The default switching Synchronization frequency is set at 500 kHz allowing for small • –40°C to 125°C Operating Junction external components and good transient response. In Temperature Range addition, the frequency can be adjusted over a range • Precision Enable Pin of 200 kHz to 1MHz with a single external resistor. The internal oscillator can be synchronized to a • Integrated Boot-Strap Diode system clock or to the oscillator of another regulator. • Adjustable Soft-Start A precision enable input allows simplification of • Fully WEBENCH® Enabled regulator control and system power sequencing. In shutdown mode the regulator draws only 25 µA (typ.). • LM22671-Q1 is an Automotive Grade Product An adjustable soft-start feature is provided through that is AEC-Q100 Grade 1 Qualified (-40°C to the selection of a single external capacitor. The +125°C Operating Junction Temperature) LM22671 also has built in thermal shutdown, and current limiting to protect against accidental PACKAGE overloads. • SO PowerPAD (Exposed Pad) The LM22671 is a member of Texas Instruments' SIMPLE SWITCHER™ family. The SIMPLE APPLICATIONS SWITCHER™ concept provides for an easy to use complete design using a minimum number of external • Industrial Control components and the TI WEBENCH® design tool. TI's • Telecom and Datacom Systems WEBENCH® tool includes features such as external • Embedded Systems component calculation, electrical simulation, thermal • Conversions from Standard 24V, 12V and 5V simulation, and Build-It boards for easy design-in. Input Rails 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 © 2008–2013, 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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Description similaire - LM22671MRE-50 |
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