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LM22670TJE-5.0 Arkusz danych(PDF) 1 Page - Texas Instruments |
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LM22670TJE-5.0 Arkusz danych(HTML) 1 Page - Texas Instruments |
1 / 29 page LM22670 www.ti.com SNVS584O – SEPTEMBER 2008 – REVISED MARCH 2013 LM22670/LM22670Q 42V, 3A SIMPLE SWITCHER®, Step-Down Voltage Regulator with Features Check for Samples: LM22670 1 FEATURES DESCRIPTION The LM22670 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 • 120 m Ω N-channel MOSFET PFM Package capable of providing up to 3A of load current. • 100 m Ω N-channel MOSFET SO PowerPAD-8 Excellent line and load regulation along with high Package efficiency (>90%) are featured. Voltage mode control • Output Voltage Options: offers short minimum on-time, allowing the widest ratio between input and output voltages. Internal loop – -ADJ (outputs as low as 1.285V) compensation means that the user is free from the – -5.0 (output fixed to 5V) tedious task of calculating the loop compensation • ±1.5% Feedback Reference Accuracy components. Fixed 5V output and adjustable output voltage options are available. The default switching • 500 kHz Default Switching Frequency frequency is set at 500 kHz allowing for small • Adjustable Switching Frequency and external components and good transient response. In Synchronization addition, the frequency can be adjusted over a range • -40°C to 125°C Operating Junction of 200 kHz to 1MHz with a single external resistor. Temperature Range The internal oscillator can be synchronized to a system clock or to the oscillator of another regulator. • Precision Enable Pin A precision enable input allows simplification of • Integrated Boot-Strap Diode regulator control and system power sequencing. In • Integrated Soft-Start shutdown mode the regulator draws only 25 µA (typ.). Built in soft-start (500µs, typ) saves external • Fully WEBENCH® enabled components. The LM22670 also has built in thermal • LM22670Q is an Automotive Grade Product shutdown, and current limiting to protect against that is AEC-Q100 Grade 1 Qualified (-40°C to accidental overloads. +125°C Operating Junction Temperature) The LM22670 is a member of Texas Instruments' • SO PowerPAD-8 (Exposed Pad) Package SIMPLE SWITCHER® family. The SIMPLE • PFM (Exposed Pad) Package SWITCHER concept provides for an easy to use complete design using a minimum number of external APPLICATIONS components and the TI WEBENCH design tool. TI's WEBENCH tool includes features such as external • Industrial Control component calculation, electrical simulation, thermal • Telecom and Datacom Systems simulation, and Build-It boards for easy design-in. • Embedded Systems • Conversions from Standard 24V, 12V and 5V 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 SIMPLE SWITCHER, WEBENCH are registered trademarks of Texas Instruments Incorporated. 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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