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LM22676 データシート(PDF) 1 Page - Texas Instruments |
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LM22676 データシート(HTML) 1 Page - Texas Instruments |
1 / 29 page LM22676-ADJ VIN EN SW BOOT FB GND VIN VOUT Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM22676, LM22676-Q1 SNVS587L – SEPTEMBER 2008 – REVISED NOVEMBER 2014 LM22676/-Q1 42 V, 3 A SIMPLE SWITCHER® Step-Down Voltage Regulator with Features 1 Features 3 Description The LM22676 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 • 120 m Ω N-Channel MOSFET PFM Package capable of providing up to 3 A of load current. • 100 m Ω N-Channel MOSFET PSOP-8 Package Excellent line and load regulation along with high • Output Voltage Options: efficiency (> 90%) are featured. Voltage mode control -ADJ (Outputs as Low as 1.285 V) offers short minimum on-time, allowing the widest -5.0 (Output Fixed to 5 V) ratio between input and output voltages. Internal loop compensation means that the user is free from the • ±1.5% Feedback Reference Accuracy tedious task of calculating the loop compensation • Switching Frequency of 500 kHz components. Fixed 5 V 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 good transient response. A precision enable input • Precision Enable Pin allows simplification of regulator control and system • Integrated Boot-Strap Diode power sequencing. In shutdown mode the regulator • Integrated Soft-Start draws only 25 µA (typ). Built in soft-start (500 µs, typ) saves external components. The LM22676 also has • Fully WEBENCH® Enabled built in thermal shutdown, and current limiting to • LM22676Q is an Automotive Grade Product protect against accidental overloads. that is AEC-Q100 Grade 1 Qualified (–40°C to +125°C Operating Junction Temperature) The LM22676 is a member of Texas Instruments' SIMPLE SWITCHER® family. The SIMPLE • SO PowerPAD (Exposed Pad SWITCHER® concept provides for an easy to use • PFM (Exposed Pad) complete design using a minimum number of external components and the TI WEBENCH® design tool. TI's 2 Applications WEBENCH® tool includes features such as external component calculation, electrical simulation, thermal • Industrial Control simulation, and Build-It boards for easy design-in. • Telecom and Datacom Systems • Embedded Systems Device Information(1) • Conversions from Standard 24 V, 12 V and 5 V PART NUMBER PACKAGE BODY SIZE (NOM) Input Rails HSOP (8) 4.89 mm x 3.90 mm LM22676, LM22676-Q1 TO-263 (3) 10.16 mm x 9.85 mm (1) For all available packages, see the orderable addendum at the end of the data sheet. Simplified Application Schematic 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. |
同様の部品番号 - LM22676 |
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同様の説明 - LM22676 |
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