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ISL9440C Datasheet(PDF) 1 Page - Intersil Corporation |
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ISL9440C Datasheet(HTML) 1 Page - Intersil Corporation |
1 / 11 page 1 CAUTION: These devices are sensitive to electrostatic discharge; follow proper IC Handling Procedures. 1-888-INTERSIL or 1-888-468-3774 | Intersil (and design) is a registered trademark of Intersil Americas Inc. Copyright Intersil Americas Inc. 2010. All Rights Reserved All other trademarks mentioned are the property of their respective owners. Application Note 1551 ISL9440AEVAL1Z: Triple PWM Step-Down Synchronous Buck Controller and One LDO ISL9440AEVAL1Z Evaluation Board The ISL9440AEVAL1Z evaluation board features the ISL9440A. The ISL9440A is a a quad-output controller that integrates three PWM synchronous buck controllers and one low-dropout linear regulator controller. The ISL9440A offers internal soft-start, independent enable functions and integrates UV/OV/OC/OT protection. Its current mode control architecture and internal compensation network keep peripheral component count minimal. Switching frequency of 600kHz minimizes inductor size while the strong gate drivers deliver up to 12A to each PWM channel. Table 1 shows the difference in terms of ISL944xx family features. The ISL9440AEVAL1Z is easy to set up to evaluate the performance of the ISL9440A. Please refer to the “Electrical Specifications” table on page 2 for typical performance summary. TABLE 1. FEATURES OF ISL944xx FAMILY PART NUMBER EARLY WARNING SWITCHING FREQUENCY (kHz) SOFT-STARTING TIME (ms) ISL9440 Yes 300 1.7 ISL9440A Yes 600 1.7 ISL9441 No 300 1.7 ISL9440B Yes 300 Programmable ISL9440C Yes 600 Programmable FIGURE 1. ISL9440AEVAL1Z EVALUATION BOARD March 5, 2010 AN1551.0 |
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