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

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.
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