Analog Devices / Maxim Integrated MAX77839 Highly-Efficient Buck-Boost Regulators

Analog Devices MAX77839 Highly-Efficient Buck-Boost Regulators feature an industry-leading quiescent current of 6μA. The devices are targeted for a one-cell Li-ion and down to any battery chemistry with 1.8V discharge voltage. It supports input voltages of 1.8V to 5.5V and an output voltage range of 2.3V to 5.3V. The IC provides two different switching current limits to optimize external component sizing based on the given load current requirements. The Analog Devices MAX77839 Buck-Boost Regulator is available in a 2.07mm x 1.51mm, 15-bump Wafer-Level Package (WLP) and in a 2.5mm x 2.0mm, 11-lead FC2QFN package.

Features

Flexible System Integration
- 1.8V to 5.5V Input Voltage Range
- 2.3V to 5.3V Single Resistor Adjustable Output
- 3.6A I_LIM (“C” and “D” options) or 4.4A I_LIM (“A” and “B” options)
- 3A Maximum Output Current (4.4A I_LIM, Buck Mode)
- 3A Maximum Output Current (4.4A I_LIM, Boost Mode 3.0V_IN, 3.3V_OUT)
- 96% Peak Efficiency (V_IN = 3.6V, V_OUT = 3.3V)
- Optional GPIO Pin (FPWM input, POK output)
Low Supply Current that Extends Battery Life
- Skip Mode that Reduces Supply Current at Light Loads
- 6μA Ultra-Low IQ

2.2MHz (typ) Switching Frequency
Integrated Protections that Provide System Robustness
- Undervoltage Lockout (UVLO)
- Overvoltage Protection (OVP)
- Cycle-by-Cycle Inductor Peak Current Limit
- Thermal Shutdown (TSHDN)
Active output discharge
Small solution Size
- 2.07mm x 1.51mm, 0.4mm pitch, 15-bump WLP
- 2.5mm x 2.0mm, 0.5mm pitch, 11-pin FC2QFN

Applications

Asset Tracking/Fleet Management
5G/2G/GSM Cellular Power
RF Amplifier

Smartphones ToF/Facial and Gesture Recognition
System Power Pre-Regulation
Single-Cell Li-ion Battery-Powered Devices

Analog Devices / Maxim Integrated MAX77839 Highly-Efficient Buck-Boost Regulators

Features

Applications

Simplified Block Diagram

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