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LM22671 Datenblatt(PDF) 1 Page - Texas Instruments |
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LM22671 Datenblatt(HTML) 1 Page - Texas Instruments |
1 / 29 page LM22671-ADJ VIN EN SW BOOT FB GND VIN VOUT RT/SYNC SS Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM22671, LM22671-Q1 SNVS589N – SEPTEMBER 2008 – REVISED NOVEMBER 2014 LM22671/-Q1 42 V, 500 mA SIMPLE SWITCHER® Step-Down Voltage Regulator with Features 1 Features 3 Description The LM22671 switching regulator provides all of the 1 • Wide Input Voltage Range: 4.5 V to 42 V 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 42 V N-channel MOSFET switch • 200 m Ω N-Channel MOSFET capable of providing up to 500 mA of load current. • Output Voltage Options: Excellent line and load regulation along with high -ADJ (Outputs as Low as 1.285 V) efficiency (> 90%) are featured. Voltage mode control -5.0 (Output Fixed to 5 V) offers short minimum on-time, allowing the widest • ±1.5% Feedback Reference Accuracy ratio between input and output voltages. Internal loop compensation means that the user is free from the • 500 kHz Default Switching Frequency tedious task of calculating the loop compensation • Adjustable Switching Frequency and components. Fixed 5 V output and adjustable output Synchronization voltage options are available. The default switching • –40°C to 125°C Operating Junction frequency is set at 500 kHz allowing for small Temperature Range external components and good transient response. In addition, the frequency can be adjusted over a range • Precision Enable Pin of 200 kHz to 1 MHz with a single external resistor. • Integrated Boot-Strap Diode The internal oscillator can be synchronized to a • Adjustable Soft-Start system clock or to the oscillator of another regulator. A precision enable input allows simplification of • Fully WEBENCH® Enabled regulator control and system power sequencing. In • LM22671-Q1 is an Automotive Grade Product shutdown mode the regulator draws only 25 µA (typ). that is AEC-Q100 Grade 1 Qualified (–40°C to An adjustable soft-start feature is provided through +125°C Operating Junction Temperature) the selection of a single external capacitor. The • SO PowerPAD™ (Exposed Pad) LM22671 device also has built-in thermal shutdown and current limiting to protect against accidental overloads. 2 Applications • Industrial Control The LM22671 device is a member of Texas Instruments' SIMPLE SWITCHER® family. The • Telecom and Datacom Systems SIMPLE SWITCHER concept provides for an easy to • Embedded Systems use complete design using a minimum number of • Conversions from Standard 24 V, 12 V and 5 V external components and the TI WEBENCH design Input Rails tool. TI's WEBENCH tool includes features such as external component calculation, electrical simulation, Simplified Application Schematic thermal simulation, and Build-It boards for easy design-in. Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM22671 HSOP (8) 4.89 mm x 3.90 mm LM22671-Q1 (1) For all available packages, see the orderable addendum at the end of the data sheet. 1 An IMPORTANT NOTICE at the end of this data sheet addresses availability, warranty, changes, use in safety-critical applications, intellectual property matters and other important disclaimers. PRODUCTION DATA. |
Ähnliche Teilenummer - LM22671_15 |
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Ähnliche Beschreibung - LM22671_15 |
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