lm22674mrx-adj National Semiconductor Corporation, lm22674mrx-adj Datasheet
lm22674mrx-adj
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lm22674mrx-adj Summary of contents
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... The LM22674 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 © 2008 National Semiconductor Corporation Features ■ Wide input voltage range: 4.5V to 42V ■ ...
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... Connection Diagram Ordering Information Output Voltage Order Number ADJ LM22674MR-ADJ ADJ LM22674MRE-ADJ ADJ LM22674MRX-ADJ 5.0 LM22674MR-5.0 5.0 LM22674MRE-5.0 5.0 LM22674MRX-5.0 Pin Descriptions Pins Name 1 BOOT GND 7 VIN 8 SW www.national.com 8-Lead Plastic PSOP-8 Package NS Package Number MRA08B Package Type NSC Package Drawing ...
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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 ...
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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 30076905 Normalized Feedback Voltage vs Temperature 30076906 30076909 5 30076910 30076907 www.national.com ...
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Typical Application Circuit and Block Diagram www.national.com FIGURE 1. 3. 500 mA OUT 6 30076914 ...
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Detailed Operating Description The LM22674 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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Boot Pin The LM22674 integrates an N-Channel FET switch and as- sociated floating high voltage level shift / gate driver. This gate driver circuit works in conjunction with an internal diode and an external bootstrap capacitor. A 0.01 µF ceramic ...
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The average current into VIN during switch on-time is the load current. The input capacitance should be selected for RMS current and minimum ripple voltage. A good ap- RMS proximation for the required ripple current rating necessary ...
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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, ...
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PCB Layout Example 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. 30076941 30076926 11 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 12 ...
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Notes 13 www.national.com ...
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