Ultra-Low IQ, Low-Noise 3.5W Buck-Boost Converter

The MAX77348 is an ultra-low quiescent current, noninverting buck-boost converter capable of supporting up to 3.5W output power. The device employs a unique control algorithm that seamlessly transitions between the buck, buck-boost, and boost modes, minimizing discontinuities and subharmonics in the output voltage ripple.

The MAX77348 is ideal for a system handling less than 3.5W output power from a single cell Li-Ion battery and requiring high system efficiency with precise voltage control. The MAX77348’s low-noise operation makes it optimum to supply power for RF system power, ear bud applications, and other portable audio systems.

Built-in undervoltage lockout (UVLO), output active discharge, and thermal shutdown protection ensures safe operation under abnormal operating conditions. The MAX77348 is available with a highly configurable I2C serial interface. The device is available in 16-bump, 1.77mm x 2.01mm, 0.4mm pitch WLP package.

APPLICATIONS

* True Wireless Stereo (TWS) Systems

* Narrow Band Internet of Things (NB IoT)

* Portable Audio/Wireless Systems

* Input Voltage Range: 2.3V to 5.5V

* Output Voltage Range: 2.5V to 4.8V

* Ultra-Low, 3.5μA (typ) Quiescent Current

* Dynamic Voltage Scaling (DVS)

* Optimized Load Regulation Performance

* Power Good Interrupt

* Output Active Discharge

* Low, Continuous Noise Profile

* Eliminates Discontinuities Over Operating Range

* Eliminates Need for Post-Filtering Low Dropout (LDO) in Noise Sensitive Applications