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TLV62569DBV Datasheet(PDF) 10 Page - Texas Instruments |
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TLV62569DBV Datasheet(HTML) 10 Page - Texas Instruments |
10 / 25 page Load (A) 60 65 70 75 80 85 90 95 100 1m 10m 100m 1 2 D004 VIN = 2.5 V VIN = 3.3 V VIN = 5.0 V Load (A) 60 65 70 75 80 85 90 95 100 1m 10m 100m 1 2 D005 VIN = 2.5 V VIN = 3.3 V VIN = 5.0 V SW IN OUT OUT L L MAX , OUT MAX , L f L V V 1 V I 2 I I I ´ - ´ = D D + = 10 TLV62569, TLV62569P SLVSDG1C – DECEMBER 2016 – REVISED OCTOBER 2017 www.ti.com Product Folder Links: TLV62569 TLV62569P Submit Documentation Feedback Copyright © 2016–2017, Texas Instruments Incorporated 8.2.2.4 Inductor Selection The main parameters for inductor selection is inductor value and then saturation current of the inductor. To calculate the maximum inductor current under static load conditions, Equation 3 is given: where: • IOUT,MAX is the maximum output current • ΔIL is the inductor current ripple • fSW is the switching frequency • L is the inductor value (3) It is recommended to choose a saturation current for the inductor that is approximately 20% to 30% higher than IL,MAX. In addition, DC resistance and size should also be taken into account when selecting an appropriate inductor. 8.2.2.5 Input and Output Capacitor Selection The architecture of the TLV62569 allows use of tiny ceramic-type output capacitors with low equivalent series resistance (ESR). These capacitors provide low output voltage ripple and are thus recommended. To keep its resistance up to high frequencies and to achieve narrow capacitance variation with temperature, it is recommended to use X7R or X5R dielectric. The input capacitor is the low impedance energy source for the converter that helps provide stable operation. A low ESR multilayer ceramic capacitor is recommended for best filtering. For most applications, 4.7-μF input capacitance is sufficient; a larger value reduces input voltage ripple. The TLV62569 is designed to operate with an output capacitor of 10 µF to 47 µF, as outlined in Table 4. 8.2.3 Application Performance Curves VIN = 5 V, VOUT = 1.8 V, L = 2.2 μH, TA = 25 °C, unless otherwise noted. Figure 6. 1.2-V Output Efficiency Figure 7. 1.8-V Output Efficiency |
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