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LM2852 Datasheet(PDF) 10 Page - Texas Instruments |
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LM2852 Datasheet(HTML) 10 Page - Texas Instruments |
10 / 22 page LM2852 SNVS325D – JANUARY 2005 – REVISED APRIL 2013 www.ti.com COMPENSATION The LM2852 provides a highly integrated solution to power supply design. The compensation of the LM2852, which is type-three, is included on-chip. The benefit to integrated compensation is straightforward, simple power supply design. Since the output filter capacitor and inductor values impact the compensation of the control loop, the range of L, C and CESR values is restricted in order to ensure stability. OUTPUT FILTER VALUES Table 1 details the recommended inductor and capacitor ranges for the LM2852 that are suggested for various typical output voltages. Values slightly different than those recommended may be used, however the phase margin of the power supply may be degraded. Table 1. Output Filter Values Frequency Option VOUT (V) PVIN (V) L (µH) C (µF) CESR (mΩ) Min Max Min Max Min Max 0.8 3.3 10 15 100 220 70 200 0.8 5.0 10 15 100 120 70 200 1.0 3.3 10 15 100 180 70 200 1.0 5.0 10 15 100 180 70 200 1.2 3.3 10 15 100 180 70 200 1.2 5.0 15 22 100 120 70 200 LM2852Y 1.5 3.3 10 15 100 120 70 200 (500kHz) 1.5 5.0 22 22 100 120 70 200 1.8 3.3 10 15 100 120 100 200 1.8 5.0 22 33 100 120 100 200 2.5 3.3 6.8 10 68 120 95 275 2.5 5.0 15 22 68 120 95 275 3.3 5.0 15 22 68 100 100 275 0.8 3.3 The 1500kHz version is designed for ceramic output 0.8 5.0 capacitors which typically have 1.0 3.3 very low ESR (<10m Ω.) 1.0 5.0 1.2 3.3 1.2 5.0 LM2852X 1.5 3.3 1 10 (1500kHz) 1.5 5.0 1.8 3.3 1.8 5.0 2.5 3.3 2.5 5.0 3.3 5.0 10 Submit Documentation Feedback Copyright © 2005–2013, Texas Instruments Incorporated Product Folder Links: LM2852 |
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