Analog Devices / Maxim Integrated MAX77680 / MAX77681 SIMO Buck-Boost Regulators
Analog Devices MAX77680/MAX77681 SIMO Buck-Boost Regulators use a low 3μA of quiescent current (IQ) to regulate three independent rails. Inefficient LDOs are replaced using the single-inductor multiple-output (SIMO) to expand battery life. Simultaneously the SIMO offers competition in efficiency to traditional single-output bucks and operates on an input supply between 2.7V and 5.5V. Each output is a buck-boost with a glitchless transition between buck and boost operation and are independently programmable between 0.8V and 5.25V. A flexible power sequencer (FPS) integrates within the device controlling the power-up/down order of each output. The Analog Devices MAX77680/MAX77681 provides a total solution size of 15.5mm2 and is available in a 30-bump wafer-level package (WLP).
Features
- Single-Inductor, Multiple-Output (SIMO) extends battery life
- 300nA shutdown current
- 3.0μA operating quiescent current (3 SIMO channels on)
- Improves overall system efficiency while reducing size
- Maintains regulation without dropout, unlike traditional bucks
- Glitchless buck-boost operation
- Compact, high-efficiency power solution
- Three independent channels from SIMO regulator
- 2.7V to 5.5V input voltage range from single cell Li-Ion
- 0.8V to 5.25V output voltage range
- Flexible power sequencing
- On-key input for hardware enable
- Reset output
Applications
- Hearables: BLUETOOTH® headphones and earbuds
- Wearables: Fitness, health, and activity monitors
- Action cameras, wearable/body cameras
- Low-power Internet of Things (IoT) gadgets
Application Circuit
Block Diagram
Evaluation Kit
Analog Devices / Maxim Integrated MAX77680EVKIT / MAX77681EVKIT Evaluation Kit
Assembled and tested PCB configured to evaluate the operation of the MAX77680/MAX77681.
Published: 2018-08-31
| Updated: 2023-04-25