LM22675MRE-5.0/NOPB National Semiconductor, LM22675MRE-5.0/NOPB Datasheet
LM22675MRE-5.0/NOPB
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LM22675MRE-5.0/NOPB Summary of contents
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... The LM22675 series also has built in thermal shutdown, current limiting and an enable control input that can power down the regulator to a low 25 µA quiescent current standby condition. Simplified Application Schematic © 2010 National Semiconductor Corporation LM22675/LM22675Q Features ■ Wide input voltage range: 4.5V to 42V ■ ...
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... Connection Diagram Ordering Information Output Order Number Voltage ADJ LM22675MR-ADJ ADJ LM22675MRE-ADJ ADJ LM22675MRX-ADJ 5.0 LM22675MR-5.0 5.0 LM22675MRE-5.0 5.0 LM22675MRX-5.0 ADJ LM22675QMR-ADJ ADJ LM22675QMRE-ADJ ADJ LM22675QMRX-ADJ 5.0 LM22675QMR-5.0 5.0 LM22675QMRE-5.0 5.0 LM22675QMRX-5.0 *Automotive Grade (Q) product incorporates enhanced manufacturing and support processes for the automotive market, including defect detection methodologies. ...
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... Absolute Maximum Ratings If Military/Aerospace specified devices are required, please contact the National Semiconductor Sales Office/ Distributors for availability and specifications. VIN to GND EN Pin Voltage SW to GND (Note 2) BOOT Pin Voltage FB Pin Voltage Power Dissipation Electrical Characteristics junction temperature (T ) range of -40°C to +125°C. Minimum and Maximum limits are guaranteed through test, design, or statistical J correlation ...
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Note 1: Absolute Maximum Ratings indicate limits beyond which damage to the device may occur, including inoperability and degradation of device reliability and/or performance. Functional operation of the device and/or non-degradation at the Absolute Maximum Ratings or other conditions beyond ...
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Feedback Bias Current vs Temperature Standby Quiescent Current vs Input Voltage Normalized Feedback Voltage vs Input Voltage Normalized Enable Threshold Voltage vs Temperature 30077005 Normalized Feedback Voltage vs Temperature 30077006 30077009 5 30077010 30077007 www.national.com ...
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Typical Application Circuit and Block Diagram www.national.com FIGURE 1. 3. OUT 6 30077014 ...
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Detailed Operating Description The LM22675 switching regulator features all of the functions necessary to implement an efficient high voltage buck regu- lator using a minimum of external components. This easy to use regulator integrates a 42V N-Channel switch with an ...
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FIGURE 2. Output Current in Foldback vs. Nominal Duty Cycle The percentage of output current limit fold back is affected by duty cycle, inductance, and See Figure 2 for details. The current limit will only protect the inductor from a ...
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Generally, calculation as well as simulation can only aid in selecting good power stage components. A good design prac- tice is to test for stability with load transient tests or loop measurement tests. Application note AN-1889 shows how to easily ...
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The resistor values can be determined by the following equa- tions: -ADJ option: -5.0 option: Where V = 1.285V typical for the -ADJ option and 5V for the FB -5.0 option FIGURE 3. Resistive Feedback Divider A maximum value of ...
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Circuit Board Layout Board layout is critical for switching power supplies. First, the ground plane area must be sufficient for thermal dissipation purposes. Second, appropriate guidelines must be followed to reduce the effects of switching noise. Switch mode con- verters ...
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PCB Layout Example www.national.com 30077041 12 ...
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Schematic for Buck/Boost (Inverting) Application See AN-1888 for more information on the inverting (buck- boost) application generating a negative output voltage from a positive input voltage. 30077026 13 www.national.com ...
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Physical Dimensions www.national.com inches (millimeters) unless otherwise noted 8-Lead Plastic PSOP-8 Package NS Package Number MRA08B 14 ...
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Notes 15 www.national.com ...
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