Ultra-Low Power PMIC with 3-Output SIMO, 150mA LDO, and Power Sequencer

The MAX77640/MAX77641 are a low-IQ power solution for applications where size and efficiency are critical. The device integrates a 3-output single-inductor multiple-output (SIMO) buck-boost regulator, a 150mA LDO, and a 3-channel current-sink driver.

The SIMO operates on an input between 2.7V and 5.5V. The outputs are independently programmable between 0.8V and 5.25V depending on ordering option. Each output is a buck-boost with glitchless transition between buck and boost operation. The SIMO can support >300mA loads (1.8VOUT, 3.7VIN).

The 150mA LDO provides ripple rejection for noise-sensitive applications. The current sinks can be programmed to blink LEDs in custom patterns. The device integrates a power sequencer to control power-up/down order of each output. Default output voltages and sequence order are factory-programmable. An I2C serial interface further configures the device.

The MAX77640/MAX77641 are available in a 30-bump wafer-level package (WLP). Total solution size is 16mm2. For a similar product with a battery charger, refer to the MAX77650.

Applications

* Action Cameras, Wearable/Body Cameras

* Hearables: Bluetooth Headphones and Earbuds

* Internet of Things (IoT) Devices

* Wearables: Fitness, Health, and Activity Monitors

* 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 Cell Li-Ion

* 0.8V to 5.25V Output Voltage Range (Table 1)

* Supports >300mA loads (1.8VOUT, 3.7VIN)

* Improves Overall System Efficiency while Reducing Size

* Maintains Regulation without Dropout unlike Traditional Bucks

* Glitchless Buck-Boost Operation

* Low Quiescent Current

* 300nA Shutdown Current

* 5.6µA Operating Current (3 SIMO Channels and LDO 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