PCA9450 application note
■The PCA9450 is a single chip Power Management IC (PMIC) specifically designed to support i.MX 8M family processor in both 1 cell Li-Ion and Li-polymer battery portable application and 5V adapter non-portable applications.
■The device provides six high efficiency step-down regulators, five LDOs, one 400 mA load switch, 2-channel level translator and 32.768 kHz crystal oscillator driver. Three buck regulators support dynamic voltage scaling (DVS) feature along with programmable ramping up and down time; the buck regulators support remote sense to compensate IR drop to load. This device is characterized across -40°C to 105°C ambient temperature range.
■Six step-down regulators are designed to provide power for i.MX 8M application processor and DRAM memory. Two LDOs (LDO1 and LDO2) feature very low quiescent current to provide power for Secure Non-Volatile Storage (SNVS) since these LDOs are always ON when input voltage is valid.
■PCA9450 integrates logic translator which is a 2-bit, dual supply translating transceiver with auto direction sensing. It enables bidirectional voltage level translation. It can be used as I²C level translator. 400 mA load switch is to supply 3.3 V power supply to SD card, which has internal discharge resistor.
■PCA9450 has three versions: PCA9450A is companion PMIC for 845S (i.MX 8M Mini), PCA9450B is companion PMIC for 815S (i.MX 8M Nano) and PCA9450C is companion PMIC for 865S ( i.MX 8M Plus).
■The PCA9450 is offered in 56-pin HVQFN package, 7 mm x 7 mm, 0.4 mm pitch.
●Features and benefits:
■Six high-efficiency step-down regulators
▲Three 3 A buck regulators with DVS feature and remote sense
◆PCA9450A – Three 3 A buck regulators
◆PCA9450B – Two 3 A buck regulators
◆PCA9450C – 6 A dual-phase buck regulator and 3 A buck regulator
■One 3 A buck regulator
■Two 2 A buck regulators
■Five linear regulators
▲Two 10 mA LDOs
▲One 150 mA LDO
▲One 200 mA LDO
▲One 300 mA LDO
■Support various memory types: DDR4/LPDDR4/DDR3L via system UBOOT configuration, no hardware change required
■400 mA load switch with built-in active discharge resistor
■32.768 kHz crystal oscillator driver and buffer output
■Two channel logic level translator
■Power control IO
▲Power ON/OFF control
▲Standby/run mode control
■Fm+ 1 MHz I²C-bus interface
■ESD protection
▲Human Body Model (HBM) : +/- 2000 V
▲Charged Device Model (CDM) : +/-500 V
■7 mm x 7 mm, 56-pin HVQFN with 0.4 mm pitch
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single chip Power Management IC (PMIC) 、 application processor |
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Application note & Design Guide |
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Please see the document for details |
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English Chinese Chinese and English Japanese |
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26 June 2020 |
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Rev. 1.0 |
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AN12840 |
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860 KB |
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