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TPS65020RHAR Datasheet(PDF) 38 Page - Texas Instruments |
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TPS65020RHAR Datasheet(HTML) 38 Page - Texas Instruments |
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38 / 53 page  Vcc_CORE Vcc_Batt Vcc_IO Vcc_LCD Vcc_MEM Vcc_BB Vcc_USIM Vcc_SRAM Vcc_PLL SYS_EN PWR_EN 3V 3V;3.3V 1.8V;2.5V;3V;3.3V 1.8V;2.5V;3V;3.3V 1.8V;2.5V;3V;3.3V 1.8V;3V 1.3V 1.1V Variable0.8Vto1.6V LDO1 L3 L1 VRTC DCDC2_EN LDO_EN LDO2 nBatt_Fault nRESET nVcc_Fault TPS65020 L2 INT RESPWRON DCDC3_EN PWRFAIL DCDC1_EN DEFDCDC3 DEFDCDC2 DEFDCDC1 Vcc SCLK SDAT Vcc_Batt 4.7 kW 4.7 kW LOWBAT_SNS PWRFAIL_SNS Vcc VBACKUP 3V backup battery Vcc VINDCDC1 VINDCDC2 VINDCDC3 Vcc 10R 1 F m 10 F m 10 F m 10 F m TRESPWRON HOT_RESET VSYSIN PB_OUT PB_IN VDCDC1 SCLK SDAT VIN_LDO LOW_BATT VDCDC1 VDCDC2 VDCDC3 Vcc 22 F m 22 F m 22 F m 2.2 H m 2.2 H m 2.2 H m 2.2 F m 2.2 F m 4.7 F m 1nF toGPIOof processor GPIOx Vcc_IO Vcc_Batt TPS65020 SLVS607D – SEPTEMBER 2005 – REVISED JANUARY 2016 www.ti.com 9.2 Typical Application Figure 37. Typical Configuration for the Intel PXA270 Bulverde Processor 9.2.1 Design Requirements The TPS6502x devices have only a few design requirements. Use the following parameters for the design examples: • 1- μF bypass capacitor on VCC, located as close as possible to the VCC pin to ground • VCC and VINDCDCx must be connected to the same voltage supply with minimal voltage difference. • Input capacitors must be present on the VINDCDCx and VIN_LDO supplies if used • Output inductor and capacitors must be used on the outputs of the DCDC converters if used • Output capacitors must be used on the outputs of the LDOs if used 9.2.2 Detailed Design Procedure 9.2.2.1 Inductor Selection for the DC-DC Converters Each of the converters in the TPS65020 typically use a 3.3- μH output inductor. Larger or smaller inductor values are used to optimize the performance of the device for specific operation conditions. The selected inductor has to be rated for its DC resistance and saturation current. The DC resistance of the inductance influences directly the efficiency of the converter. Therefore, an inductor with lowest DC resistance must be selected for highest efficiency. 38 Submit Documentation Feedback Copyright © 2005–2016, Texas Instruments Incorporated Product Folder Links: TPS65020 |
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