MAX77827 Switch Buck-Boost Converter with 6 µA IQ

Product Highlights > MAX77827 Switch Buck-Boost Converter with 6 µA IQ

            MAX77827 Switch Buck-Boost Converter with 6 µA IQ
                    Analog Devices' high-efficiency, 5.5 V input, 1.8 A/3.1 A  converter is designed to improve battery lifetime 
    

Analog Devices' MAX77827 is a high-efficiency buck-boost regulator targeted for 1-cell Li-Ion powered applications with an ultra-low quiescent current of 6 μA. The device supports input voltages of 1.8 V to 5.5 V and an output voltage range of 2.3 V to 5.3 V. The buck-boost regulator provides two different switching current levels (1.8 A and 3.1 A) to optimize external component sizing based on the given load current requirements. With the 1.8 A switching current-limit option, the MAX77827 can support up to 1.0 A load current in buck-mode and 900 mA in boost-mode (V_IN = 3.0 V, V_OUT = 3.3 V).

The MAX77827 offers a peak efficiency of 96% making it an ideal DC/DC converter solution to supply a rail for battery-powered portable applications. The regulator features an adjustable output voltage which can be programmed from 2.3 V to 5.3 V through a single resistor. Two GPIO pins are available to support forced PWM (FPWM) enable functionality and a power-OK (POK) indicator. A control algorithm allows high-efficiency, outstanding line/load transient response, and a seamless transition between buck and boost modes. These features provide design flexibility allowing the MAX77827 to cover a wide range of applications and use cases while minimizing board space.

Mobile Power Selector Guide

Power Management for the Smart Building

Power Management for the Smart Factory

Features

Input voltage range: 1.8 V to 5.5 V
Single resistor adjustable output voltage: 2.3 V to 5.3 V
Max output current: 1.6 A (3.1 A ILIM option and buck-mode)
Max output current: 900 mA (1.8 A ILIM option, boost-mode: 3.0 V_IN, and 3.3 V_OUT)
Peak efficiency: 96% (3.3 V_IN and 3.3 V_OUT)
Skip-mode for higher light-load efficiency
Ultra-low typ. quiescent current: 6 µA (+25°C T_J)
Nominal switching frequency: 2.5 MHz
Enable pin
GPIO pins for system design convenience:
- FPWM mode selection pin
- POK indicator pin
UVLO, soft-start, active-output discharge, overcurrent, and thermal shutdown protections
Package: 1.61 mm x 2.01 mm, 12-bump WLP