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LM22677 Folha de dados(PDF) 1 Page - Texas Instruments |
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LM22677 Folha de dados(HTML) 1 Page - Texas Instruments |
1 / 28 page LM22677-ADJ VIN EN SW BOOT FB GND VIN VOUT RT/SYNC Product Folder Sample & Buy Technical Documents Tools & Software Support & Community Reference Design LM22677, LM22677-Q1 SNVS582O – SEPTEMBER 2008 – REVISED AUGUST 2015 LM22677/-Q1 42-V, 5-A SIMPLE SWITCHER®, Step-Down Voltage Regulator With Features 1 Features 3 Description The LM22677 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 minimum on-time, allowing the widest ratio between – -5.0 (Output Fixed to 5 V) input and output voltages. Internal loop compensation • ±1.5% Feedback Reference Accuracy means that the user is free from the tedious task of • 500-kHz Default Switching Frequency calculating the loop compensation components. Fixed • Adjustable Switching Frequency and 5-V output and adjustable output voltage options are available. The default switching frequency is set at Synchronization 500 kHz, thus allowing for small external components • –40°C to +125°C Operating Junction Temperature and good transient response. In addition, the Range frequency can be adjusted over a range of 200 kHz • Precision Enable Input to 1 MHz with a single external resistor. The internal • Integrated Boot-Strap Diode oscillator can be synchronized to a system clock or to the oscillator of another regulator. A precision enable • Integrated Soft-Start input allows simplification of regulator control and • Fully WEBENCH® Enabled system power sequencing. In shutdown mode the • LM22677-Q1 is an Automotive-Grade Product regulator draws only 25 µA (typical). The LM22677 that is AEC-Q100 Grade 1 Qualified (–40°C to also has built-in thermal shutdown, and current limiting to protect against accidental overloads. +125°C Operating Junction Temperature) • NDR (Exposed Pad) The LM22677 device is a member of Texas Instruments' SIMPLE SWITCHER® family. The 2 Applications SIMPLE SWITCHER concept provides for an easy-to- 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) Simplified Application Schematic PART NUMBER PACKAGE BODY SIZE (NOM) LM22677 TO-263 (7) 10.16 mm x 9.85 mm LM22677-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. |
Nº de peça semelhante - LM22677 |
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Descrição semelhante - LM22677 |
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