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MP1583 Datasheet(PDF) 10 Page - Monolithic Power Systems |
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MP1583 Datasheet(HTML) 10 Page - Monolithic Power Systems |
10 / 13 page MP1583 – 3A, 23V, 385KHz STEP-DOWN CONVERTER MP1583 Rev. 3.1 www.MonolithicPower.com 10 6/20/2011 MPS Proprietary Information. Unauthorized Photocopy and Duplication Prohibited. © 2011 MPS. All Rights Reserved. D1 C4 R3 C5 R4 L1 SGND PGND C6 C2 C3 C1 Top Layer Bottom Layer Figure 3―PCB Layout (Double Layer) External Bootstrap Diode An external bootstrap diode may enhance the efficiency of the regulator, the applicable conditions of external BST diode are: VOUT=5V or 3.3V; and Duty cycle is high: D= IN OUT V V >65% In these cases, an external BST diode is recommended from the output of the voltage regulator to BST pin, as shown in Fig.4 MP1583 SW BST C L BST C 5V or 3.3V OUT External BST Diode IN4148 + Figure 4—Add Optional External Bootstrap Diode to Enhance Efficiency The recommended external BST diode is IN4148, and the BST cap is 0.1~1µF. |
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