LM2674LD-ADJ/NOPB National Semiconductor, LM2674LD-ADJ/NOPB Datasheet
LM2674LD-ADJ/NOPB
Specifications of LM2674LD-ADJ/NOPB
LM2674LD-ADJTR
Related parts for LM2674LD-ADJ/NOPB
LM2674LD-ADJ/NOPB Summary of contents
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... The output switch includes current limiting, as well as thermal shutdown for full protection under fault conditions. Typical Application SIMPLE SWITCHER ® registered trademark of National Semiconductor Corporation. Windows ® registered trademark of Microsoft Corporation. © 2005 National Semiconductor Corporation Power Converter High Efficiency ® ...
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... ADJ www.national.com See NSC Package Drawing Number MO8A/N08E 10004138 Package Marking LM2674LD-12 S0009B LM2674LDX-12 S0009B LM2674LD-3.3 S000AB LM2674LDX-3.3 S000AB LM2674LD-5.0 S000BB LM2674LDX-5.0 S000BB LM2674LD-ADJ S000CB LM2674LDX-ADJ S000CB LM2674M-12 2674M-12 LM2674MX-12 2674M-12 LM2674M-3.3 2674M-3.3 LM2674MX-3.3 2674M-3.3 LM2674M-5.0 2674M-5.0 LM2674MX-5.0 2674M-5.0 ...
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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. Supply Voltage ON/OFF Pin Voltage Switch Voltage to Ground Boost Pin Voltage Feedback Pin Voltage ESD Susceptibility Human Body Model (Note 2) Power Dissipation ...
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LM2674-ADJ (Continued) Symbol Parameter η Efficiency V = 12V All Output Voltage Versions Specifications with standard type face are for T ture Range. Unless otherwise specified, V sion, and I = 100 mA. LOAD Symbol Parameters DEVICE PARAMETERS ...
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Typical Performance Characteristics Normalized Output Voltage Efficiency Switch Current Limit 10004103 10004105 10004107 5 Line Regulation 10004104 Drain-to-Source Resistance 10004106 Operating Quiescent Current 10004108 www.national.com ...
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Typical Performance Characteristics Standby Quiescent Current ON/OFF Pin Current (Sourcing) Feedback Pin Bias Current www.national.com (Continued) 10004109 10004111 10004113 6 ON/OFF Threshold Voltage 10004110 Switching Frequency 10004112 Peak Switch Current 10004114 ...
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Typical Performance Characteristics Dropout Voltage — 3.3V Option Block Diagram * Active Inductor Patent Number 5,514,947 † Active Capacitor Patent Number 5,382,918 (Continued) Dropout Voltage — 5.0V Option 10004115 FIGURE 1. 7 10004116 10004117 www.national.com ...
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Typical Performance Characteristics (Circuit of Figure 2) Continuous Mode Switching Waveforms V = 20V 5V OUT LOAD L = 100 µ 100 µF, C OUT A: V Pin Voltage, 10 V/div Inductor ...
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Test Circuit and Layout Guidelines µF, 50V Tantalum, Sprague “199D Series” µF, 25V Tantalum, Sprague “595D Series” OUT D1 - 3.3A, 50V Schottky Rectifier, IR 30WQ05F µH Sumida #RCR110D-680L C ...
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LM2674 Series Buck Regulator Design Procedure (Fixed Output) PROCEDURE (Fixed Output Voltage Version) To simplify the buck regulator design procedure, National Semiconductor is making available computer design software to be used with the SIMPLE SWITCHER line of switching regulators. LM267X ...
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LM2674 Series Buck Regulator Design Procedure (Fixed Output) PROCEDURE (Fixed Output Voltage Version) The capacitor list contains through-hole electrolytic capacitors from four different capacitor manufacturers and surface mount tantalum capacitors from two different capacitor manufacturers recommended that both ...
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LM2674 Series Buck Regulator Design Procedure (Fixed Output) PROCEDURE (Fixed Output Voltage Version) A low ESR aluminum or tantalum bypass capacitor is needed between the input pin and ground to prevent large voltage transients from appearing at the input. This ...
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INDUCTOR VALUE SELECTION GUIDES FIGURE 4. LM2674-3.3 FIGURE 6. LM2674-12 (For Continuous Mode Operation) 10004126 10004128 13 10004127 FIGURE 5. LM2674-5.0 10004129 FIGURE 7. LM2674-ADJ www.national.com ...
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INDUCTOR VALUE SELECTION GUIDES Ind. Inductance Current Ref. Through (µH) (A) Desg. Hole L2 150 0.21 67143920 67144290 RL-5470-4 L3 100 0.26 67143930 67144300 RL-5470 0.32 67143940 67144310 L5 47 0.37 67148310 67148420 L6 33 0.44 67148320 67148430 ...
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INDUCTOR VALUE SELECTION GUIDES Surface Mount Output Inductance Voltage Sprague (µH) (V) 594D Series (µF/V) 22 120/6.3 33 120/6.3 47 68/10 3.3 68 120/6.3 100 120/6.3 150 120/6.3 22 100/16 33 68/10 47 68/10 5.0 68 100/16 100 100/16 150 ...
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INDUCTOR VALUE SELECTION GUIDES 20V 30V 40V 50V International Rectifier Corp. Motorola, Inc. General Instruments Corp. Diodes, Inc. FIGURE 14. RMS Current Ratings for Low ESR Electrolytic Capacitors (Typical) www.national.com (For Continuous Mode Operation) (Continued) 500mA Diodes 3A Diodes V ...
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INDUCTOR VALUE SELECTION GUIDES FIGURE 15. Recommended Application Voltage for AVX TPS and Sprague 594D Tantalum Chip Capacitors Derated for 85˚C. (For Continuous Mode Operation) (Continued) AVX TPS Recommended Voltage Application Voltage Rating +85˚C Rating 3.3 6 ...
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LM2674 Series Buck Regulator Design Procedure (Adjustable Output) PROCEDURE (Adjustable Output Voltage Version) To simplify the buck regulator design procedure, National Semiconductor is making available computer design software to be used with the SIMPLE SWITCHER line of switching regulators. LM267X ...
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LM2674 Series Buck Regulator Design Procedure (Adjustable Output) (Continued) PROCEDURE (Adjustable Output Voltage Version) B. Select an appropriate capacitor value and voltage rating, using the capacitor code, from the output capacitor selection table in Figure 17. There are two solid ...
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LM2674 Series Buck Regulator Design Procedure (Adjustable Output) (Continued) PROCEDURE (Adjustable Output Voltage Version) 5. Input Capacitor ( low ESR aluminum or tantalum bypass capacitor is needed between the input pin and ground to prevent large voltage ...
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LM2674 Series Buck Regulator Design Procedure (Adjustable Output) (Continued) Surface Mount Cap. Sprague AVX TPS Ref. Desg. 594D Series Series # (µF/V) (µF/V) C1 120/6.3 100/10 C2 120/6.3 100/10 C3 120/6.3 100/10 C4 68/10 100/10 C5 100/16 100/10 C6 100/16 ...
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Application Information TYPICAL SURFACE MOUNT PC BOARD LAYOUT, FIXED OUTPUT (4X SIZE µF, 25V, Solid Tantalum Sprague, “594D series” µF, 10V, Solid Tantalum Sprague, “594D series” OUT D1 - 1A, 40V Schottky Rectifier, ...
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Application Information Layout is very important in switching regulator designs. Rap- idly switching currents associated with wiring inductance can generate voltage transients which can cause problems. For minimal inductance and ground loops, the wires indicated by heavy lines (in Figure ...
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Physical Dimensions unless otherwise noted 8-Lead (0.150" Wide) Molded Small Outline Package, JEDEC www.national.com inches (millimeters) Order Number LM2674M-3.3, LM2674M-5.0, LM2674M-12 or LM2674M-ADJ NS Package Number M08A 24 ...
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Physical Dimensions inches (millimeters) unless otherwise noted (Continued) 8-Lead (0.300" Wide) Molded Dual-In-Line Package Order Number LM2674N-3.3, LM2674N-5.0, LM2674N-12 or LM2674N-ADJ NS Package Number N08E 25 www.national.com ...
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