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[原创] Maxim MAX77714手持设备系统电源管理解决方案

关键词:电源管理 PMIC 手持设备 无人机 智能手机 MAX77714

时间:2018-06-25 10:48:19       作者:Maxim       来源:中电网

Maxim公司的MAX77714是完整的电源管理IC(PMIC)系统,包括有13个稳压器,8个GPIO,RTC以及多核应用的灵活加电次序.其两个2A(SD2/3),一个3A(SD1)和一个4A(SD0)降压稳压器开关频率2MHz,可以使用小型磁元件,SD0和SD1输出电压从0.26V到1.52V可编程,每步10mV,SD2输出电压从0.6V到2.194V可编程,每步6.5mV,SD3输出电压从0.6V到3.78V可编程,每步12.5mV.器件主要用在无人机,智能手机/平板电脑,手持游戏机,AR/VR耳机,流媒体设备/机顶盒,家庭自动化集线器,数码相机,汽车售后配件.本文介绍了MAX77714主要优势和特性,简化框图,通用资源逻辑图,线性稳压器功能框图,典型应用电路图以及评估板MAX77714 EVK主要特性,电路图,材料清单和PCB设计图.

The MAX77714 is a complete power-management IC(PMIC) for portable devices using System-on-Chip (SoC)applications processors.Two 2A (SD2/3), one 3A (SD1), and one 4A (SD0) stepdownregulator switch at 2MHz, allowing the use of smallmagnetic components. The output voltages for SD0 andSD1 are programmable from 0.26V to 1.52V in 10mVsteps. The output voltage for SD2 is programmable from0.6V to 2.194V in 6.5mV steps. The output voltage for SD3is programmable from 0.6V to 3.78V in 12.5mV steps.

Nine low-dropout (LDO) linear regulators supply power tovarious system blocks. Each LDO features a programmableactive-discharge circuit in shutdown. All LDOs featuretwo soft-start rates to limit inrush current during start up.Eight programmable GPIOs can be programmed as generalpurpose inputs (GPI), general purpose outputs(GPO), or alternate modes for additional functionalities.

The real-time clock (RTC) with an external crystal oscillatorprovides time keeping and alarm wake-up functions.An internal silicon oscillator is available for systems thatdo not want to use the crystal oscillator. In addition, awatchdog timer is integrated for system monitoring purposes.

An integrated ON/OFF controller, in combination with flexiblepower sequencer (FPS), provides maximum flexibilityin setting power-up/down sequences with minimal interventionfrom the applications processor.The 70-bump, 4.1mm x 3.25mm x 0.7mm, 0.4mm pitchwafer-level package (WLP) is ideal for space constrainedapplications.

Factory-programmable options allow the MAX77714 to betailored for many applications. Contact the factory formore information about programmable options; minimumorder quantities may apply.

MAX77714主要优势和特性:

● Highly Integrated
• 4x Buck Regulators
• SD0/1 Peak Efficiency >90% at 3.6VIN,1.1VOUT
• SD2/3 Peak Efficiency >93% at 3.6VIN,1.8VOUT
• Supports LDDR4x Memory requirements
• 9x Low-Dropout Linear Regulator
• Eight GPIOs
• Real-Time Clock
• Backup Battery Charger
• Bidirectional Reset I/O
• Interrupt Output
• System Watchdog Timer
● Flexible and Configurable
• I2C-Compatible Interface
• Factory OTP Options Available
• Flexible Power Sequencer
• Configurable Power-Up/Power-Down/Sleep ModeEntry/Exit Timing
• Highly configurable GPIO ALT Modes
• Three Resources can beConfigured as 32kHz Oscillator Output
• Four Resources can be Configured on FPS
• One Resource can be Configured as ACOKInput
● Low Power
• Low IQ of 85μA in Sleep Mode
• SD0/1 Low-Power Quiescent Current is 10μA
• SD2/3 Low-Power Quiescent Current is 5μA
• LDO Low-Power Quiescent Current is 1.5μA
● Small Size
• 70-Bump, 0.4mm Pitch, 10x7 BallArray WLP, 4.1mm x 3.25mm x 0.7mm Package
Size
• 230mm2 Total Solution Size

MAX77714应用:

● Drones
● Smartphones/Tablet PCs
● Handheld Gaming Devices
● AR/VR Headsets
● Streaming Devices/Set-Top Boxes
● Home Automation Hubs
● Digital Cameras
● Automotive Aftermarket Accessories

图1.MAX77714简化框图

图2.MAX77714通用资源逻辑图

图3.MAX77714线性稳压器功能框图

图4.MAX77714典型应用电路图

评估板MAX77714 EVK

The MAX77714 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the highly-integrated MAX77714 PMIC. The device is a complete power-management IC (PMIC) for mobile devic­es using System-on-Chip (SOC) applications processors. The device includes four buck regulators, nine low-drop­out linear regulators, eight GPIOs, real-time clock (RTC), backup battery charger, bidirectional reset I/O, interrupt output, and a system watchdog timer.

The EV kit also includes a MAXQ2000 microcontroller command module that provides the I2C interface to con­trol power sequence, individual regulator output on/off, GPIOs, RTC, and setting regulator output voltage. The MAX77714 evaluation software is provided for easy evaluation.

评估板MAX77714 EVK主要优势和特性:

USB to I2C Converter Allows for Easy Communication
Level Translator (MAX3395) Allows for Adjusting I2C Bus Voltage from 1.8V to 3.3V
On-Board Electronics Load Allows for Easy Evaluation GUI Allows Static/Dynamic Load Adjustment for Buck Converters and LDOs
MOSFET can be Driven by External Function Gen­erator to Evaluate Transient Performance for Each Regulator
Proven PCB Reference Design and Layout
Fully Assembled and Tested

图5.评估板MAX77714 EVK外形图

图6.评估板MAX77714 EVK电路图(1)

图7.评估板MAX77714 EVK电路图(2)

图8.评估板MAX77714 EVK电路图(3)

图9.评估板MAX77714 EVK电路图(4)

图10.评估板MAX77714 EVK电路图(5)
评估板MAX77714 EVK材料清单:




图11.评估板MAX77714 EVK PCB设计图(1):顶层丝印

图12.评估板MAX77714 EVK PCB设计图(2):顶层布局

图13.评估板MAX77714 EVK PCB设计图(3):内层2

图14.评估板MAX77714 EVK PCB设计图(4):内层4

图15.评估板MAX77714 EVK PCB设计图(5):底层

图16.评估板MAX77714 EVK PCB设计图(6):底层丝印
详情请见:
https://datasheets.maximintegrated.com/en/ds/MAX77714.pdf
https://datasheets.maximintegrated.com/en/ds/MAX77714EVKIT.pdf
MAX77714.pdf
MAX77714EVKIT.pdf

 

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