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TPS62624YFFT Datasheet(PDF) 10 Page - Texas Instruments |
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TPS62624YFFT Datasheet(HTML) 10 Page - Texas Instruments |
10 / 28 page VIN SW FB MODE EN GND L V I C I TPS6262x C O V O TPS62620, TPS62621, TPS62622 TPS62623, TPS62624, TPS62625 SLVS848D – JULY 2009 – REVISED OCTOBER 2015 www.ti.com 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 TPS6262x device family provides high-frequency synchronous step-down DC/DC converters optimized for battery-powered portable applications. Intended for low-power applications, the TPS6262x devices support up to 600 mA load current, and allow the use of low cost chip inductor and capacitors. 9.2 Typical Application Figure 5. TPS6262x Typical Application Schematic 9.2.1 Design Requirements The design guideline provides a component selection to operate the device within the recommended operating conditions. Table 1 shows the list of components for the Application Curves. Table 1. List of Components REFERENCE DESCRIPTION MANUFACTURER L 1 μH MURATA LQM21PN1R0NGR CIN 2.2 μF, 6.3V, 0402, X5R MURATA GRM155R60J225ME15 COUT 4.7 μF, 6.3V, 0402, X5R MURATA GRM155R60J475M 9.2.2 Detailed Design Procedure 9.2.2.1 Inductor Selection The TPS6262x device family of step-down converters have been optimized to operate with an effective inductance value in the range of 0.3 μH to 1.3 μH and with output capacitors in the range of 4.7 μF to 10 μF. The internal compensation is optimized to operate with an output filter of L = 0.47 μH and COUT = 4.7 μF. Larger or smaller inductor values can be used to optimize the performance of the device for specific operation conditions. For more details, see section Checking Loop Stability. The inductor value affects its peak-to-peak ripple current, the PWM-to-PFM transition point, the output voltage ripple and the efficiency. The selected inductor has to be rated for its DC resistance and saturation current. The inductor ripple current ( ΔIL) decreases with higher inductance and increases with higher VIN or VOUT. 10 Submit Documentation Feedback Copyright © 2009–2015, Texas Instruments Incorporated |
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