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SWCS049E 数据表(PDF) 47 Page - Texas Instruments |
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SWCS049E 数据表(HTML) 47 Page - Texas Instruments |
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47 / 144 page  47 TPS65911 www.ti.com SWCS049S – JUNE 2010 – REVISED AUGUST 2018 Submit Documentation Feedback Product Folder Links: TPS65911 Detailed Description Copyright © 2010–2018, Texas Instruments Incorporated 6.3 Power Reference The band-gap voltage reference is filtered by using an external capacitor connected across the VREF output and the analog ground REFGND (see Section 5.3). The VREF voltage is distributed and buffered inside the device. 6.4 Power Resources The power resources provided by the TPS65911 device include inductor based switched mode power supplies (SMPSs) and linear low-dropout voltage regulators (LDOs). These supply resources provide the required power to the external processor cores and external components, and to modules embedded in the TPS65911 device. Two of the integrated SMPSs and the external FET SMPS have voltage scaling capability. These SMPSs provide independent core voltage domains to the host processor. When changing the output voltage, VDD1 and VDD2 reach the new value through successive steps of 2.5 to 12.5 mV. The size of the voltage step is selected by the TSTEP bit. VDDCtrl has a target slew rate of 100 mV/20 µs. New output values are reached in successive smaller steps of N × LSB, LSB = 12.5 mV, N = 1 to 4. A suitable combination of steps is calculated internally based on current and new target value for output voltage. The VIO SMPS provides supply voltage for the host processor I/Os. Table 6-1 lists the power sources provided by the TPS65911 device. Table 6-1. Power Sources RESOURCE TYPE VOLTAGES POWER VIO SMPS 1.5 V 1300 mA 1.8 V 1200 mA 2.5 or 3.3 V 1100 mA VDD1 SMPS 0.6 to 2.2 V 1500 mA 3.2 V 1200 mA 1.2 or 1.35 or 1.5 V (VINmin = 3 V) 2000 mA 0.6 ... 1.5 V in 12.5-mV steps Programmable multiplication factor: ×2, ×3. Maximum output 3.3 V VDD2 SMPS 0.6 to 1.5 V 1500 mA 2.2 / 3.2 V 1200 mA 0.6 ... 1.5 V in 12.5-mV steps Programmable multiplication factor: ×2, ×3. Maximum output 3.3 V VDDCtrl SMPS 0.6 … 1.4 V in 12.5-mV steps External component dependent LDO1 LDO 1.0–3.3 V, 0.05-V step 320 mA LDO2 LDO 1.0–3.3 V, 0.05-V step 320 mA LDO3 LDO 1.0–3.3 V, 0.1-V step 200 mA LDO4 LDO 1.0–3.3 V, 0.05-V step 50 mA LDO5 LDO 1.0–3.3 V, 0.1-V step 300 mA LDO6 LDO 1.0–3.3 V, 0.1-V step 300 mA LDO7 LDO 1.0–3.3 V, 0.1-V step 300 mA LDO8 LDO 1.0–3.3 V, 0.1-V step 300 mA 6.5 Embedded Power Controller (EPC) The EPC manages the state of the device and controls the power-up sequence. |
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