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LM2854 Datasheet(PDF) 8 Page - Texas Instruments |
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LM2854 Datasheet(HTML) 8 Page - Texas Instruments |
8 / 30 page 0 4 92 93 94 95 96 97 98 99 LOAD CURRENT (A) 1 2 3 VIN = 5.0V VIN = 4.0V 0 4 84 86 88 90 92 94 96 98 LOAD CURRENT (A) 1 2 3 VIN = 5.0V VIN = 3.3V 0 4 90 99 LOAD CURRENT (A) 1 2 3 91 92 93 94 95 96 97 98 VIN = 3.3V VIN = 5.0V 0 4 80 82 84 86 88 90 92 94 96 LOAD CURRENT (A) 1 2 3 VIN = 3.3V VIN = 5.0V LM2854 SNVS560B – MARCH 2008 – REVISED NOVEMBER 2008 www.ti.com Typical Performance Characteristics (continued) Unless otherwise specified, the following conditions apply: VIN = PVIN = AVIN = EN = 5.0V, CIN is 47 µF 10V X5R ceramic capacitor, LO is from TDK SPM6530T family; TAMBIENT = 25°C for efficiency curves, bode plots and waveforms, and TJ = 25°C for all others. LM2854 500 kHz Efficiency vs. LM2854 500 kHz Efficiency vs. IOUT VOUT = 2.5V, LO = 2.2 µH, 16 mΩ DCR IOUT VOUT = 1.2V, LO = 1.5 µH, 9.7 mΩ DCR Figure 20. Figure 21. LM2854 500 kHz Efficiency vs. LM2854 500 kHz Efficiency vs. IOUT VOUT = 3.3V, LO = 1.5 µH, 9.7 mΩ DCR IOUT VOUT = 1.8V, LO = 1.5 µH, 9.7 mΩ DCR Figure 22. Figure 23. LM2854 1 MHz Bode Plot LM2854 500 kHz Bode Plot VIN = 3.3V, VOUT = 1.8V, IOUT = 4A VIN = 3.3V, VOUT = 1.8V, IOUT = 4A RFB1 = 150 kΩ, RCOMP = 1 kΩ, CCOMP = 100 pF, RFB1 = 250 kΩ, RCOMP = 1 kΩ, CCOMP = 47 pF, LOUT = 0.82 µH, COUT = 100 µF ceramic LOUT = 1.5 µH, COUT = 100 µF ceramic Figure 24. Figure 25. 8 Submit Documentation Feedback Copyright © 2008, Texas Instruments Incorporated Product Folder Links: LM2854 |
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