General Description

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.

Benefits and Features

• 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

• Protection Features

• Undervoltage Lockout (UVLO)

• Thermal Shutdown

• 6.4ms Soft-Start

• I2C Interface with Status Interrupts

• Programmable VOUT

• Peak Current Limit Level (IPSET1/IPSET2)

Applications

• True Wireless Stereo (TWS) Systems

• Narrow Band Internet of Things (NB IoT)

• Portable Audio/Wireless Systems