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LM22670 bảng dữ liệu(PDF) 1 Page - Texas Instruments |
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LM22670 bảng dữ liệu(HTML) 1 Page - Texas Instruments |
1 / 32 page LM22670-ADJ VIN EN SW BOOT FB GND VIN VOUT RT/SYNC Product Folder Sample & Buy Technical Documents Tools & Software Support & Community LM22670, LM22670-Q1 SNVS584P – SEPTEMBER 2008 – REVISED NOVEMBER 2014 LM22670/-Q1 42-V, 3-A SIMPLE SWITCHER®, Step-Down Voltage Regulator With Features 1 Features 3 Description The LM22670 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 • 120-m Ω N-channel MOSFET PFM Package can provide up to 3 A of load current. Excellent line • 100-m Ω N-channel MOSFET SO PowerPAD™-8 and load regulation along with high efficiency (> 90%) Package are featured. Voltage mode control offers short • Output Voltage Options: minimum on-time, allowing the widest ratio between -ADJ (Outputs as Low as 1.285 V) input and output voltages. Internal loop compensation -5.0 (Output Fixed to 5 V) means that the user is free from the tedious task of calculating the loop compensation components. Fixed • ±1.5% Feedback Reference Accuracy 5-V output and adjustable output voltage options are • 500-kHz Default Switching Frequency available. The default switching frequency is set at • Adjustable Switching Frequency and 500 kHz, thus allowing for small external components Synchronization and good transient response. In addition, the frequency can be adjusted over a range of 200 kHz • –40°C to 125°C Operating Junction Temperature to 1 MHz with a single external resistor. The internal Range oscillator can be synchronized to a system clock or to • Precision Enable Pin the oscillator of another regulator. A precision enable • Integrated Boot-Strap Diode input allows simplification of regulator control and system power sequencing. In shutdown mode the • Integrated Soft-Start regulator draws only 25 µA (typical). Built in soft-start • Fully WEBENCH® Enabled (500 µs, typical) saves external components. The • LM22670-Q1 is an Automotive-Grade Product LM22670 device also has built-in thermal shutdown, that is AEC-Q100 Grade 1 Qualified (–40°C to and current limiting to protect against accidental +125°C Operating Junction Temperature) overloads. The LM22670 device is a member of Texas 2 Applications Instruments' SIMPLE SWITCHER® family. The SIMPLE SWITCHER® concept provides for an easy- • Industrial Control to-use complete design using a minimum number of • Telecom and Datacom Systems external components and the TI WEBENCH design • Embedded Systems tool. TI's WEBENCH tool includes features such as • Conversions from Standard 24-V, 12-V and 5-V external component calculation, electrical simulation, thermal simulation, and Build-It boards for easy Input Rails design-in. Simplified Application Schematic Device Information(1) PART NUMBER PACKAGE BODY SIZE (NOM) HSOP (8) 4.89 mm x 3.90 mm LM22670 LM22670-Q1 TO-263 (7) 10.16 mm x 9.85 mm (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. |
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Mô tả tương tự - LM22670 |
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