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TPS65020RHAR Datasheet(PDF) 42 Page - Texas Instruments |
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TPS65020RHAR Datasheet(HTML) 42 Page - Texas Instruments |
42 / 53 page I -OutputCurrent-mA O T =25 C V =3.3V A O o PFM/PWMMode V =3.8V I V =4.2V I V =5V I 0.01 0.1 1 10 100 1k 10k I -OutputCurrent-mA O T =25 C V =1.8V A O o PWM/PFMMode V =2.5V I V =5V I 0.01 0.1 1 10 100 1k 10k V =4.2V I V =3.8V I TPS65020 SLVS607D – SEPTEMBER 2005 – REVISED JANUARY 2016 www.ti.com The minimum and maximum values for the timing parameters called ICONST (2 µA), TRESPWRON_UPTH (1 V), and TRESPWRON_LOWTH (0.25 V) can be found under the Electrical Characteristics. 9.2.2.8 VCC Filter An RC filter connected at the VCC input is used to prevent noise from the internal supply for the bandgap and other analog circuitry. A typical resistor value of 1 Ω and 1 μF is used to filter the switching spikes generated by the DC-DC converters. A resistor larger than 10 Ω must not be used because the current (up to 3 mA) into VCC causes a voltage drop at the resistor. This causes the undervoltage lockout circuitry connected internally at VCC to switch off too early. 9.2.3 Application Curves Graphs were taken using the EVM with the inductor and output capacitor combinations in Table 19. Table 19. Inductor and Output Capacitor Combinations CONVERTER INDUCTOR OUTPUT CAPACITOR OUTPUT CAPACITOR VALUE VDCDC1 VLCF4020-2R2 C2012X5R0J106M 2 × 10 μF VDCDC2 VLCF4020-2R2 C2012X5R0J106M 2 × 10 μF VDCDC3 VLF4012AT-2R2M1R5 C2012X5R0J106M 2 × 10 μF spacer Figure 40. DCDC2 Efficiency Figure 39. DCDC1 Efficiency 42 Submit Documentation Feedback Copyright © 2005–2016, Texas Instruments Incorporated Product Folder Links: TPS65020 |
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