原标题：NXP PF3000i.MX 7应用处理器电源管理方案

　　NXP公司的PF3000是Freescale i.MX 7和i.MX 6SL/SX/UL应用处理器的电源管理集成电路(PMIC),包括有四个降压转换器,六个线性稳压器,RTC电源和纽扣电池充电器,组成了应用处理器,存储器和系统外设的完整系统.主要用在平板电脑,可穿戴电子,POS机,工业控制,医疗电子,家庭自动化和安全/能量管理.本文介绍了PF3000主要特性,框图,典型应用电路及其材料清单,评估板KITPF3000FRDMEVM主要特性,电路图,材料清单和PCB设计文件.

　　The PF3000 is a Power Management Integrated Circuit (PMIC) designed specifically for use with the Freescale i.MX 7 and i.MX 6SL/SX/UL application processors. With up to four buck converters, six linear regulators, RTC supply, and coin-cell charger, the PF3000 can provide power for a complete system, including applications processors, memory, and system peripherals. This device is powered by SMARTMOS technology.

　　PF3000主要特性:

　　•Input voltage range to PMIC: 2.8 V to 4.5 V, or 3.7 V to 5.5 V (2)

　　•Buck regulators

　　•Configurable three to four channels

　　•SW1A/B, 2.75 A (single); 0.7 V to 1.425 V, 1.8 V, 3.3 V

　　•SW1A, 1.0 A (independent); 0.7 V to 1.425 V, 1.8 V, 3.3 V

　　•SW1B 1.75 A (independent); 0.7 V to 1.475 V

　　•SW2, 1.25 A; 1.50 V to 1.85 V or 2.50 V to 3.30 V

　　•SW3, 1.5 A; 0.90 V to 1.65 V

　　•Dynamic voltage scaling

　　•Modes: PWM, PFM, APS

　　•Programmable output voltage

　　•Programmable current limit

　　•Programmable soft start sequence

　　•Programmable PWM switching frequency

　　•Boost regulator

　　•SWBST, 5.0 to 5.15 V, 0.6 A, OTG support

　　•Modes: PFM and Auto

　　•OCP fault interrupt

　　•LDOs

　　•VCC_SD, 1.8 V to 1.85 V or 2.85 V to 3.30 V, 100 mA based on SD_VSEL

　　•V33, 2.85 V to 3.30 V, 350 mA

　　•VLDO1, 1.8 V to 3.3 V, 100 mA

　　•VLDO2, 0.80 V to 1.55 V, 250 mA

　　•VLDO3, 1.8 V to 3.3 V, 100 mA

　　•VLDO4, 1.8 V to 3.3 V, 350 mA

　　•Always ON RTC Regulator/Switch VSNVS 3.0 V, 1.0 mA

　　•DDR memory reference voltage, VREFDDR, 0.5 V to 0.9 V, 10 mA

　　•OTP (One time programmable) memory for device configuration, user-programmable start-up sequence and timing

　　•Battery backed memory including coin cell charger

　　•I2C interface

　　•User programmable Standby, Sleep/LPSR, and Off modes

　　PF3000应用:

　　•Tablets

　　•eReaders

　　•Wearables

　　•POS terminals

　　•Industrial control

　　•Medical monitoring

　　•Home automation

　　•Home security/energy management

　　图1.PF3000框图

　　图2.PF3000详细功能框图

　　图3.PF3000简化应用框图

　　图4.PF3000简化应用电路图

　　图4PF3000简化应用电路图的材料清单:-40℃-85℃应用

　　评估板KITPF3000FRDMEVM

　　This evaluation kit is intended for use of ENGINEERING DEVELOPMENT OR EVALUATION PURPOSES ONLY. It is provided as a sample IC pre-soldered to a printed circuit board to make it easier to access inputs, outputs, and supply terminals. This evaluation kit may be used with any development system or other source of I/O signals by simply connecting it to the host MCU or computer board via off-the-shelf cables. Final device in an application will be heavily dependent on proper printed circuit board layout and heat sinking design as well as attention to supply filtering, transient suppression, and I/O signal quality. The goods provided may not be complete in terms of required design, marketing, and or manufacturing related protective considerations, including product safety measures typically found in the end product incorporating the goods. Due to the open construction of the product, it is the user’s responsibility to take any and all appropriate precautions with regard to electrostatic discharge. In order to minimize risks associated with the customers applications, adequate design and operating safeguards must be provided by the customer to minimize inherent or procedural hazards. For any safety concerns, contact Freescale sales and technical support services.

　　The KITPF3000FRDMEVM Evaluation Board (EVB) is an easy-to-use circuit board allowing the user to exercise all the functions of the PF3000 and PF3001 Power Management IC. This board can be used to emulate the PF3001.

　　A FRDM-KL25Z is mounted to the EVB as an integral component. The FRDM-KL25Z serves as an interface between the KITPF3000GUI and the PF3000 or between the PF3001GUI and the PF3001. Analog-to-Digital Convertors (ADCs) in the FRDM-KL25Z monitor the regulator voltages through the GUI.

　　评估板KITPF3000FRDMEVM包括:

　　•Assembled and tested KITPF3000FRDMEVM evaluation board

　　•Firmware loaded FRDM-KL25Z board (mounted to the evaluation board)

　　•Quick Start Guide

　　•USB to Mini-USB Cable

　　•Warranty card

　　评估板KITPF3000FRDMEVM主要特性:

　　•PF3000 and PF3001 Power Management IC

　　•Input supply using wall adaptor or lab power supply through banana jacks

　　•Integrated FRDM-KL25Z as communication link between the EVB and a PC

　　•Two 1 Amp E-Loads with configurable current

　　图5.评估板KITPF3000FRDMEVM外形图