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TPS62293DRVRG4 Fiches technique(PDF) 11 Page - Texas Instruments |
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TPS62293DRVRG4 Fiches technique(HTML) 11 Page - Texas Instruments |
11 / 27 page 1 OUT REF 2 R V V 1 R æ ö = ´ + ç ÷ è ø GND EN FB SW MODE V 2.3 V to 6.0 V IN C 10 F IN m VIN TPS62290DRV L 2.2 H 1 m R 360 k 1 W R 180 k 2 W C 22 pF 1 C 10 F OUT m V 1.8 V, Up to 1A OUT TPS62290, TPS62291, TPS62293 www.ti.com SLVS764F – JUNE 2007 – REVISED JANUARY 2016 9 Application and Implementation NOTE Information in the following applications sections is not part of the TI component specification, and TI does not warrant its accuracy or completeness. TI’s customers are responsible for determining suitability of components for their purposes. Customers should validate and test their design implementation to confirm system functionality. 9.1 Application Information The TPS6229x devices are high-efficiency synchronous step-down DC/DC converters featuring power save mode or 2.25-MHz fixed frequency operation. 9.2 Typical Application Figure 6. TPS62290DRV Adjustable 1.8 V 9.2.1 Design Requirements The design guideline provides a component selection to operate the device within the recommended operating condition. Table 1 shows the list of components for the Application Characterstic Curves. Table 1. List of Components COMPONENT REFERENCE PART NUMBER MANUFACTURER VALUE CIN GRM188R60J106M Murata 10 μF, 6.3 V. X5R Ceramic COUT GRM188R60J106M Murata 10 μF, 6.3 V. X5R Ceramic C1 Murata 22 pF, COG Ceramic L1 LPS3015 Coilcraft 2.2 μH, 110 mΩ R1, R2 Values depending on the programmed output voltage 9.2.2 Detailed Design Procedure 9.2.2.1 Output Voltage Setting The output voltage can be calculated to: with an internal reference voltage VREF typical 0.6 V. To minimize the current through the feedback divider network, R2 should be 180 kΩ or 360 kΩ. The sum of R1 and R2 should not exceed ~1MΩ, to keep the network robust against noise. An external feed forward capacitor C1 is required for optimum load transient response. The value of C1 should be in the range between 22 pF and 33 pF. Route the FB line away from noise sources, such as the inductor or the SW line. Copyright © 2007–2016, Texas Instruments Incorporated Submit Documentation Feedback 11 Product Folder Links: TPS62290 TPS62291 TPS62293 |
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