EVALUATION KIT AVAILABLE Click here to ask about the production status of specific part numbers. MAX77827 5.5V Input, 1.8A/3.1A Switch Buck-Boost Converter with 6A I Q General Description Benefits and Features The MAX77827 is a high-efficiency buck-boost regulator 1.8V to 5.5V Input Voltage Range targeted for one-cell Li-ion powered applications with the 2.3V to 5.3V Single Resistor Adjustable Output lowest typical quiescent current in the industry of 6A. It Voltage supports input voltages of 1.8V to 5.5V and an output volt- 1.6A Maximum Output Current (3.1A I Option, LIM age range of 2.3V to 5.3V. The IC provides two different Buck Mode) switching current levels (1.8A and 3.1A) to optimize ex- 900mA Maximum Output Current (1.8A I Option, LIM ternal component sizing based on given load current re- Boost Mode 3.0V , 3.3V ) IN OUT quirements. With the 1.8A switching current-limit option, 96% Peak Efficiency (3.3V , 3.3V ) IN OUT the IC can support up to 1.0A load current in buck mode SKIP Mode for Higher Light-Load Efficiency and 900mA in boost mode (V = 3.0V, V = 3.3V). 6A Ultra-Low Typical Quiescent Current (At T = IN OUT J +25C) The peak efficiency of 96% makes the IC one of the best 2.5MHz Nominal Switching Frequency solutions as a DC/DC converter to supply a rail for battery- Enable Pin powered portable applications. GPIO Pins for System Design Convenience The IC features an adjustable output voltage, which can FPWM (Forced PWM) Mode Selection Pin be programmed from 2.3V to 5.3V through a single resis- POK Indicator Pin tor. Two GPIO pins are available to support force PWM UVLO, Soft-Start, Active-Output Discharge, enable function and power-OK (POK) indicator. A unique Overcurrent, and Thermal Shutdown Protections control algorithm allows high-efficiency, outstanding line/ 1.61mm x 2.01mm, 12-Bump WLP load transient response, and seamless transition between 2.5mm x 2.5mm, 14-Lead FC2QFN buck and boost modes. These options provide design flex- ibility that allow the IC to cover a wide range of applica- Ordering Information appears at end of data sheet. tions and use cases while minimizing board space. The MAX77827 is available in a 1.61mm x 2.01mm, 12-bump wafer-level package (WLP), and a 2.5mm x 2.5mm, 14-lead FC2QFN package. Applications 1-Cell Li+ Battery Powered Equipment Smartphones/Portable/Wearables Internet of Things (IoT) Devices LPWAN (LTE/NB-IoT, LTE/Cat-M1) Simplified Block Diagram L 1H 2 14.52mm SOLUTION SIZE 1.8V TO 5.5V DC SOURCE LX1 LX2 IN OUT V OUT C COUT IN 2.3V TO 5.3V 22F 10F MAX77827MAX77827 OUTS FPWM FPWM ENABLE ENABLE EN POK POWER-OK L 2012 BIAS SEL C BIAS 4.00mm 1F AGND PGND * RSEL *CHOOSE RSEL VALUE BASED ON VOUT, SEE TABLE 2 19-100546 Rev 5 8/21 3.63mm RSEL CIN 0603 CBIAS C OUT 0603MAX77827 5.5V Input, 1.8A/3.1A Switch Buck-Boost Converter with 6A I Q TABLE OF CONTENTS General Description 1 Applications 1 Benefits and Features 1 Simplified Block Diagram . 1 Absolute Maximum Ratings 6 Package Information . 6 12 WLP . 6 14 FC2QFN . 6 Electrical Characteristics . 7 Typical Operating Characteristics 9 Pin Configurations 12 12 WLP 12 14 FC2QFN 12 Pin Description 13 Functional Diagrams 13 Function Diagram 13 Detailed Description 14 Start Up . 14 Immediate Shutdown Conditions 15 Power Down 15 Buck-Boost Regulator 15 Buck-Boost Control Scheme . 15 Output Voltage Configuration . 16 FPWM Mode Enable . 17 Power-OK (POK) Indicator . 17 Protection Features 17 Undervoltage Lockout (UVLO) . 17 Soft-Start 17 Output Active Discharge 18 Overcurrent Protection (OCP) 18 Thermal Shutdown 18 Applications Information . 19 Inductor Selection 19 Input Capacitor Selection 19 Output Capacitor Selection 19 PCB Layout Guidelines . 20 Typical Application Circuits . 21 Typical Application Circuit . 21 Ordering Information 22 www.maximintegrated.com Maxim Integrated 2