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LM22678TJE-ADJ 数据表(PDF) 1 Page - Texas Instruments |
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LM22678TJE-ADJ 数据表(HTML) 1 Page - Texas Instruments |
1 / 23 page LM22678-ADJ VIN EN SW BOOT FB GND VIN VOUT LM22678 www.ti.com SNVS585K – SEPTEMBER 2008 – REVISED MARCH 2013 LM22678/LM22678Q 42V, 5A SIMPLE SWITCHER® Step-Down Voltage Regulator with Features Check for Samples: LM22678 1 FEATURES DESCRIPTION The LM22678 switching regulator provides all of the 23 • 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 • 100 m Ω N-Channel MOSFET capable of providing up to 5A 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 • Switching Frequency of 500 kHz tedious task of calculating the loop compensation components. Fixed 5V output and adjustable output • -40°C to 125°C Operating Junction voltage options are available. A switching frequency Temperature Range of 500 kHz allows for small external components and • Precision Enable Pin good transient response. A precision enable input • Integrated Boot-Strap Diode allows simplification of regulator control and system power sequencing. In shutdown mode the regulator • Integrated Soft-Start draws only 25 µA (typ.). Built in soft-start (500µs, typ) • Fully WEBENCH® enabled saves external components. The LM22678 also has • LM22678Q is an Automotive Grade Product built in thermal shutdown, and current limiting to that is AEC-Q100 Grade 1 Qualified (-40°C to protect against accidental overloads. +125°C Operating Junction Temperature) The LM22678 is a member of Texas Instruments' • PFM (Exposed Pad) Package SIMPLE SWITCHER® family. The SIMPLE SWITCHER concept provides for an easy to use APPLICATIONS complete design using a minimum number of external components and the TI WEBENCH design tool. TI's • Industrial Control WEBENCH tool includes features such as external • Telecom and Datacom Systems component calculation, electrical simulation, thermal • Embedded Systems simulation, and Build-It boards for easy design-in. • Conversions from Standard 24V, 12V and 5V Input Rails Simplified Application Schematic 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 SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments. 3 All other 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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类似说明 - LM22678TJE-ADJ |
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