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LM2665M6 数据表(PDF) 8 Page - Texas Instruments |
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LM2665M6 数据表(HTML) 8 Page - Texas Instruments |
8 / 16 page LM2665 SNVS009F – NOVEMBER 1999 – REVISED MAY 2013 www.ti.com The selection of capacitors is based on the specifications of the dropout voltage (which equals Iout Rout), the output voltage ripple, and the converter efficiency. Low ESR capacitors () are recommended to maximize efficiency, reduce the output voltage drop and voltage ripple. Low ESR Capacitor Manufacturers Manufacturer Phone Capacitor Type Nichicon Corp. (708)-843-7500 PL & PF series, through-hole aluminum electrolytic AVX Corp. (803)-448-9411 TPS series, surface-mount tantalum Sprague (207)-324-4140 593D, 594D, 595D series, surface-mount tantalum Sanyo (619)-661-6835 OS-CON series, through-hole aluminum electrolytic Murata (800)-831-9172 Ceramic chip capacitors Taiyo Yuden (800)-348-2496 Ceramic chip capacitors Tokin (408)-432-8020 Ceramic chip capacitors Other Applications PARALLELING DEVICES Any number of LM2665s can be paralleled to reduce the output resistance. Each device must have its own pumping capacitor C1, while only one output capacitor Cout is needed as shown in Figure 14. The composite output resistance is: (4) Figure 14. Lowering Output Resistance by Paralleling Devices CASCADING DEVICES Cascading the LM2665s is an easy way to produce a greater voltage (A two-stage cascade circuit is shown in Figure 15). The effective output resistance is equal to the weighted sum of each individual device: Rout = 1.5Rout_1 + Rout_2 (5) Note that, the increasing of the number of cascading stages is pracitically limited since it significantly reduces the efficiency, increases the output resistance and output voltage ripple. 8 Submit Documentation Feedback Copyright © 1999–2013, Texas Instruments Incorporated Product Folder Links: LM2665 |
类似零件编号 - LM2665M6 |
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类似说明 - LM2665M6 |
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