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PCA9450 Folha de dados(PDF) 21 Page - NXP Semiconductors |
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PCA9450 Folha de dados(HTML) 21 Page - NXP Semiconductors |
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21 / 96 page  NXP Semiconductors PCA9450 Power management IC for i.MX 8M application processor family PCA9450 All information provided in this document is subject to legal disclaimers. © NXP B.V. 2019. All rights reserved. Product data sheet Rev. 1.0 — 19 November 2019 21 / 96 Power Rail Default Voltage OFF SNVS STANDBY RUN BUCK2 VDD_ARM 0.85 V OFF OFF OFF ON LDO3 VDDA_1P8 1.8 V OFF OFF ON ON BUCK5 NVCC_1V8 1.8 V OFF OFF ON ON BUCK6 NVCC_DRAM 1.1 V OFF OFF ON ON BUCK4 NVCC_3V3 3.3 V OFF OFF ON ON LDO5 NVCC_SD2 3.3 V / 1.8 V OFF OFF ON ON Table 15 shows PCA9450B/PCA9450C regulator ON/OFF control in each power mode by default. It can be reconfigured through I2C registers. Table 15. PCA9450B/PCA9450C Regulator Control summary Power Rail Default Voltage OFF SNVS STANDBY RUN LDO1 NVCC_SNVS 1.8 V OFF ON ON ON LDO2 VDD_SNVS 0.85 V OFF ON ON ON BUCK1 VDD_SOC VDD_ DRAM VDD_GPU VDD_VPU 0.85 V OFF OFF ON ON LDO4 0.9 V OFF OFF OFF OFF BUCK2 VDD_ARM 0.85 V OFF OFF OFF ON LDO3 VDDA_1P8 1.8 V OFF OFF ON ON BUCK5 NVCC_1V8 1.8 V OFF OFF ON ON BUCK6 NVCC_DRAM 1.1 V OFF OFF ON ON BUCK4 NVCC_3V3 3.3 V OFF OFF ON ON LDO5 NVCC_SD2 3.3 V / 1.8 V OFF OFF ON ON 7.6 Regulator summary The PCA9450 features six buck regulators, five linear regulators and one load switch to supply voltage rails powering the application processor and peripheral devices. The buck regulators are supplied directly from the main input supply. The input to all of the buck regulators must be tied to VSYS, whether they are powered on or off. 7.6.1 BUCK regulator The PCA9450A has six high-efficiency low Iq buck regulators. Each buck regulator features soft start and overcurrent protection. Buck regulator operates in two modes: PFM and PWM mode. It automatically transitions from PFM to PWM mode when FPWM bit is set to “0”. Internal active discharge resistor is installed in each buck regulator output to discharge voltage on output capacitors when regulator is off. It is configurable through I2C register. Table 16 shows buck regulator summary. BUCK1 and BUCK3 are configured as dual-phase buck regulator in PCA9450C and provide up to 6 A. Table 17 shows PCA9450C buck summary. |
Nº de peça semelhante - PCA9450 |
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Descrição semelhante - PCA9450 |
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