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LM22678-Q1 Datasheet(PDF) 1 Page - Texas Instruments |
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LM22678-Q1 Datasheet(HTML) 1 Page - Texas Instruments |
1 / 26 page LM22678-ADJ VIN EN SW BOOT FB GND VIN VOUT Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM22678, LM22678-Q1 SNVS585L – SEPTEMBER 2008 – REVISED NOVEMBER 2014 LM22678/-Q1 42-V, 5-A SIMPLE SWITCHER® Step-Down Voltage Regulator With Features 1 Features 3 Description The LM22678 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 that • 100-m Ω N-Channel MOSFET can provide up to 5 A of load current. Excellent line • Output Voltage Options: and load regulation along with high efficiency (> 90%) -ADJ (Outputs as Low as 1.285 V) are featured. Voltage mode control offers short -5.0 (Output Fixed to 5 V) minimum on-time, allowing the widest ratio between • ±1.5% Feedback Reference Accuracy input and output voltages. Internal loop compensation means that the user is free from the tedious task of • Switching Frequency of 500 kHz calculating the loop compensation components. Fixed • –40°C to 125°C Operating Junction Temperature 5-V output and adjustable output voltage options are Range available. A switching frequency of 500 kHz allows for • Precision Enable Pin small external components and good transient response. A precision enable input allows • Integrated Boot-Strap Diode simplification of regulator control and system power • Integrated Soft-Start sequencing. In shutdown mode the regulator draws • Fully WEBENCH® Enabled only 25 µA (typical). Built-in soft-start (500 µs, typical) saves external components. The LM22678 device • LM22678-Q1 is an Automotive-Grade Product also has built-in thermal shutdown, and current that is AEC-Q100 Grade 1 Qualified (–40°C to limiting to protect against accidental overloads. +125°C Operating Junction Temperature) • PFM (Exposed Pad) Package The LM22678 device is a member of Texas Instruments' SIMPLE SWITCHER® family. The SIMPLE SWITCHER concept provides for an easy-to- 2 Applications use complete design using a minimum number of • Industrial Control external components and the TI WEBENCH design • Telecom and Datacom Systems tool. TI's WEBENCH tool includes features such as external component calculation, electrical simulation, • Embedded Systems thermal simulation, and Build-It boards for easy • Conversions from Standard 24-V, 12-V and 5-V design-in. Input Rails Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) LM22678 TO-263 (7) 10.16 mm x 9.85 mm LM22678-Q1 (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. |
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