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[原创] Maxim MAX77640/MAX77641超低功耗PMIC解决方案

关键词:电源管理 PMIC MAX77640/MAX77641

时间:2019-01-17 10:22:15       作者:Maxim       来源:中电网

Maxim公司的MAX77640/MAX77641是具有3输出SIMO,150mA LDO和加电順序器的超低功耗PMIC,集成了3输出单电感多输出(SIMO)降压-升压稳压器,150mA LDO和三路电流沉驱动器,工作电压2.7V-5.5V,输出电压0.8V -5.25V可调,主要用在蓝牙耳机和耳塞,可穿戴如健美,健康和活动监视器,照相机,可穿戴照相机和物联网(IoT)小型电器.本文介绍了MAX77640/MAX77641主要优势和特性,详细框图和简化应用电路,以及评估板MAX77640/MAX77641 EVK优势和特性,框图,电路图,材料清单和PCB设计图.

The MAX77640/MAX77641 are a low-IQ power solutionfor applications where size and efficiency are critical. Thedevice integrates a 3-output single-inductor multiple-output (SIMO) buck-boost regulator, a 150mA LDO, and a3-channel current-sink driver.The SIMO operates on an input between 2.7V and 5.5V.

The outputs are independently programmable between0.8V and 5.25V depending on ordering option. Each outputis a buck-boost with glitchless transition between buckand boost operation. The SIMO can support >300mAloads (1.8VOUT, 3.7VIN).

The 150mA LDO provides ripple rejection for noise-sensitiveapplications. The current sinks can be programmedto blink LEDs in custom patterns. The device integratesa power sequencer to control power-up/down order ofeach output. Default output voltages and sequence orderare factory-programmable. An I2C serial interface furtherconfigures the device.

The MAX77640/MAX77641 are available in a 30-bumpwafer-level package (WLP). Total solution size is 16mm2.For a similar product with a battery charger, refer to theMAX77650.

MAX77640/MAX77641主要优势和特性:

● Compact, High-Efficiency Power Solution
• 3-Output Single-Inductor Multiple-Output (SIMO)Buck-Boost Regulator
• 150mA LDO
• 3-Channel Current-Sink Driver
• Flexible Power Sequencing
• GPIO and Reset Output
● 3-Output SIMO Extends Battery Life
• 2.7V to 5.5V Input Voltage Range from Single CellLi-Ion
• 0.8V to 5.25V Output Voltage Range
• Supports >300mA loads (1.8VOUT, 3.7VIN)
• Improves Overall System Efficiency while ReducingSize
• Maintains Regulation without Dropout unlikeTraditional Bucks
• Glitchless Buck-Boost Operation
● Low Quiescent Current
• 300nA Shutdown Current
• 5.6μA Operating Current (3 SIMO Channels andLDO On)
● Small Size
• 2.75mm x 2.15mm (0.7mm max heigh) WLP
• 30-Bump, 0.4mm Pitch, 6 x 5 Array
• 16mm2 Total Solution Size

MAX77640/MAX77641应用:

● Hearables: Bluetooth Headphones and Earbuds
● Wearables: Fitness, Health, and Activity Monitors
● Action Cameras, Wearable/Body Cameras
● Internet of Things (IoT) Gadgets

图1.MAX77640/MAX77641简化应用电路

图2.SIMO详细框图

图3.MAX77640/MAX77641应用电路图

评估板MAX77640/MAX77641 EVK

The MAX77640/MAX77641 evaluation kit (EV kit) is a fully assembled and tested printed circuit board (PCB) that demonstrates the MAX77640/MAX77641. The EV kit allows for easy evaluation of the MAX77640/MAX77641 resources, including the SIMO, LDO, GPIO, current sinks, and I2C interface.

Windows®-based software provides a user-friendly graph­ical interface (GUI) as well as a detailed register-based interface to exercise the features of the MAX77640/ MAX77641.

评估板MAX77640/MAX77641 EVK优势和特性:

Easy to Use GUI Drives I2C Interface
Red/Green/Blue LED
Fully Assembled and Tested
Emulates System Loading On-Board Electronic Load for LDO and SIMO Buck Boost Outputs
Electronic Load has Steady-State, Transient, and Random Modes
Evaluates Both Push-Button and Slider-Switch On-Key Options

图4.评估板MAX77640/MAX77641 EVK外形图

图5.评估板MAX77640/MAX77641 EVK正面图

图6.评估板MAX77640/MAX77641 EVK背面图

图7.评估板MAX77640/MAX77641 EVK框图

图8.评估板MAX77640/MAX77641 EVK电路图(1)

图9.评估板MAX77640/MAX77641 EVK电路图(2)

图10.评估板MAX77640/MAX77641 EVK电路图(3)

图11.评估板MAX77640/MAX77641 EVK电路图(4)
评估板MAX77640/MAX77641 EVK材料清单:



图12.评估板MAX77640/MAX77641 EVK PCB设计图(1):顶层丝印

图13.评估板MAX77640/MAX77641 EVK PCB设计图(2):底层丝印

图14.评估板MAX77640/MAX77641 EVK PCB设计图(3):制造笔记

图15.评估板MAX77640/MAX77641 EVK PCB设计图(4):顶层布局

图16.评估板MAX77640/MAX77641 EVK PCB设计图(5):内层2

图17.评估板MAX77640/MAX77641 EVK PCB设计图(6):内层3

图18.评估板MAX77640/MAX77641 EVK PCB设计图(7):底层
详情请见:
https://datasheets.maximintegrated.com/en/ds/MAX77640-MAX77641.pdf
https://datasheets.maximintegrated.com/en/ds/MAX77640EVKIT-MAX77641EVKIT.pdf
MAX77640-MAX77641.pdf
MAX77640EVKIT-MAX77641EVKIT.pdf

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