EVALUATION KIT AVAILABLE Click here to ask an associate for production status of specific part numbers. MAX77831 2.5V to 16V Input, 7A Switching Current High-Efficiency Buck-Boost Converter General Description Benefits and Features The MAX77831 is a high-efficiency, high-performance Wide Input Voltage Range: 2.5V to 16V buck-boost converter targeted for systems requiring wide Default Output Voltage input voltage range (2.5V to 16V). It features a 7A switch- 5V with Internal Feedback Resistors ing current and can supply up to 6A output current in buck 3V to 15V with External Feedback Resistors mode and up to 4A in boost mode (boost ratio 1.3). Default 1.8MHz Switching Frequency 2 The IC is available in 5V default output voltage when using 1.5MHz and 1.2MHz Selectable through the I C internal feedback resistors. The IC can also be config- Interface ured to any default output voltages between 3V and 15V Forced-PWM (FPWM) Mode Operation Only when using external feedback resistors. The output volt- 2 I C-Programmable Output Voltage After Startup 2 age is adjustable dynamically through the I C serial inter- 4.5V to 15V (Internal Feedback Resistors) face (see the Output Voltage Configuration section). The 3V to 15V (External Feedback Resistors, see Table IC only operates in forced-PWM (FPWM) mode. 2) The SEL pin allows a single external resistor to program Maximum Output Current 2 four different I C interface slave addresses, four different Buck Mode: Up to 6A switching-current limit thresholds, and selection between Boost Mode: Up to 4A (Boost Ratio 1.3)) external/internal feedback resistors. The different switch- ing-current limit thresholds allow the use of lower profile 7A Typical Switching Current and smaller external components that are optimized for a R Configuration SEL particular application. The use of external feedback resis- 2 I C Interface Slave Address tors allows for a wider output voltage range and customiz- Switching Current Limit Threshold able output voltages at startup. Internal/External Feedback Resistors 2 The I C serial interface is optional and allows dynamically 2 I C Programming controlling the output voltage, the slew rate of the output Output Voltage (DVS) voltage change, switching-current limit threshold, and 2 Slew Rate of Output Voltage Change switching frequency. The I C-programmed settings have Switching Current Limit Threshold priority over the R decoded settings. SEL Switching Frequency The MAX77831 is available in a 2.83mm x 2.03mm Power-OK (POK) Status and Fault Interrupt Masks 35-bump wafer-level package (WLP). Internal Compensation Soft-Start Applications Output Active Discharge Non-Battery Powered Applications up to 16V Input Open-Drain Power-OK (POK) Monitor/Fault Condition Battery Powered Applications up to 16V Input with EN Interrupt Control Protection Features Undervoltage Lockout (UVLO) Overcurrent Protection (OCP) Overvoltage Protection (OVP) Thermal Shutdown (THS) High Density Interconnect (HDI) PCB Not Required (See the PCB Layout Guideline Section) Available in 2.83mm x 2.03mm 35 WLP Ordering Information appears at end of data sheet. 19-100808 Rev 2 10/21 2021 Analog Devices, Inc. All rights reserved. Trademarks and registered trademarks are the property of their respective owners. One Analog Way, Wilmington, MA 01887 U.S.A. Tel: 781.329.4700 2021 Analog Devices, Inc. All rights reserved.MAX77831 2.5V to 16V Input, 7A Switching Current High-Efficiency Buck-Boost Converter Simplified Block Diagram 4.4mm CBST1 CBST2 0.22F L 0.22F 50V 0603 1.5H 50V 0603 COMPONENT SIZES 2 55.38mm USING INTERNAL FEEDBACK RESISTORS LISTED IN IMPERIAL L BST1 LX1 LX2 BST2 MAXIMUM UNLESS OTHERWISE 4.0mm x 4.0mm SOLUTION SIZE SPECIFIED DC SOURCE IN OUT V OUT C C IN OUT 2.5V TO 16V 4.5V TO 15V 2x 10F 2x 22F MAX77831 FB 25V 0805 25V 0805 ENABLE EN V IO IO SUPPLY VIO CVIO VL 1.08V TO 2.0V CVL 0.47F RPU 2.2F 10V 0402 15k 10V 0402 0402 POK/INTERRUPT POKB/INTB SCL OPTIONAL 2 I C INTERFACE SEL SDA C C BST1 BST2 AGND PGND 0603 0603 *CHOOSE R VALUE SEL * R SEL BASED ON TABLE 3 C C R VIO VL SEL 0402 0402 0402 9.0mm ESTIMATION BASED ON 18W OUTPUT APPLICATION, SMALLER SOLUTION SIZE POSSIBLE FOR APPLICATIONS WITH LOWER OUTPUT POWER USING SMALLER INDUCTOR www.analog.com Analog Devices 2 4.1mm C IN 0805 4.2mm C IN 0805 COUT 0805 C OUT 0805