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LM3485 Scheda tecnica(PDF) 8 Page - Texas Instruments |
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LM3485 Scheda tecnica(HTML) 8 Page - Texas Instruments |
8 / 28 page Inductor Current SW node Voltage Output Ripple Voltage TIME (5Ps/div) 0A 0.5A 0V 5V 10V 0mV 20mV -20mV 0 200 400 600 800 4 12 20 28 36 INPUT VOLTAGE (V) L=10PH L=15PH L=22PH (1A/div) (2V/div) lind@CADJ = 10nF lind@CADJ = 1nF VOUT@CADJ = 10nF VOUT@CADJ = 1nF (2V/div) VIN (10V/div) TIME (100Ps/div) 0A 0.5A 0V 5V 10V 0mV 20mV -20mV 1A Inductor Current SW node Voltage Output Ripple Voltage TIME (2Ps/div) 40 50 60 70 80 90 100 LOAD CURRENT (mA) 10 100 1000 10000 VIN = 12V VIN = 4.5V VIN = 24V 40 50 60 70 80 90 100 10 100 1000 10000 LOAD CURRENT (mA) VIN = 12V VIN = 24V LM3485 SNVS178H – JANUARY 2002 – REVISED DECEMBER 2015 www.ti.com Typical Characteristics (continued) Unless otherwise specified, TJ = 25°C VOUT = 5.0 V L = 22 µH VOUT = 3.3 V L = 22 µH Figure 14. Efficiency vs Load Current Figure 13. Efficiency vs Load Current VIN = 12 V VOUT = 3.3 V IOUT = 500 mA L = 22 µH Figure 16. Continuous Mode Operation Figure 15. Start Up VOUT = 3.3 V IOUT = 1 A COUT(ESR) = 80 mΩ VIN = 12 V VOUT = 3.3 V IOUT = 50 mA Cff = 100 pF L = 22 µH Figure 18. Operating Frequency vs Input Voltage Figure 17. Discontinuous Mode Operation 8 Submit Documentation Feedback Copyright © 2002–2015, Texas Instruments Incorporated Product Folder Links: LM3485 |
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