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Moteur de recherche de fiches techniques de composants électroniques |
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Moteur de recherche de fiches techniques de composants électroniques |
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LM3668 Fiches technique(PDF) 6 Page - Texas Instruments |
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LM3668 Fiches technique(HTML) 6 Page - Texas Instruments |
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6 / 26 page  TEMPERATURE (°C) 2.00 1.95 1.90 1.85 1.80 1.75 1.70 -40 -20 0 20 40 60 80 100 VIN = 3.6V LOAD (mA) 100 90 80 70 60 50 40 30 20 10 0 0 1 10 100 1000 VIN = 5.5V VIN = 5.0V VIN = 3.6V VIN = 2.5V VIN = 2.7V TEMPERATURE (°C) 150 125 100 75 50 25 0 -40 -20 0 20 40 60 80 100 NFET = 2.5V NFET = 2.7V NFET = 3.6V NFET = 5.5V TEMPERATURE (°C) 200 175 150 125 100 75 50 25 0 -40 -20 0 20 40 60 80 100 PFET_RDS = 2.5V PFET_RDS = 2.7V PFET_RDS = 3.6V PFET_RDS = 5.5V TEMPERATURE (°C) 900 800 700 600 500 400 300 200 -40 -20 0 20 40 60 80 100 IQ_2.5V IQ_3.6V IQ_5.5V TEMPERATURE (°C) 2.4 2.3 2.2 2.1 2.0 1.9 -40 -20 0 20 40 60 80 100 VIN = 2.5V VIN = 3.6V VIN = 5.5V LM3668 SNVS449L – JUNE 2007 – REVISED MARCH 2011 www.ti.com Typical Performance Characteristics Typical Application Circuit (Figure 1): VIN = 3.6V, L = 2.2µH, CIN = 10µF, COUT = 22µF (1), T A = 25°C , unless otherwise stated. Supply Current Switching Frequency vs vs. Temperature (Not switching) Temperature (VOUT = 3.4V) (VOUT = 3.4V) Figure 6. Figure 7. NFET_RDS (on) PFET_RDS (on) vs. vs. Temperature Temperature (VOUT = 3.4V) (VOUT = 3.4V) Figure 8. Figure 9. ILIMIT vs. Temperature Efficiency at VOUT = 2.8V (VOUT = 3.4V) (Forced PWM Mode) Figure 10. Figure 11. (1) CIN and COUT: Low-ESR Surface-Mount Ceramic Capacitors (MLCCs) used in setting electrical characteristics. COUT_MIN should not exceed −40% of suggested value. The preferable choice would be a type and make MLCC that issues −30% over the operating temperature and voltage range. 6 Submit Documentation Feedback Copyright © 2007–2011, Texas Instruments Incorporated Product Folder Links: LM3668 |
Numéro de pièce similaire - LM3668_14 |
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Description similaire - LM3668_14 |
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