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link to page 1 link to page 1 link to page 1 link to page 2 link to page 7 link to page 7 link to page 7 link to page 7 link to page 8 link to page 11 link to page 16 link to page 16 link to page 16 link to page 16 link to page 17 link to page 17 link to page 17 link to page 18 link to page 20 link to page 20 link to page 21 link to page 21 link to page 21 link to page 21 link to page 21 link to page 22 link to page 22 link to page 23 link to page 23 link to page 24 link to page 24 link to page 24 link to page 24 link to page 25 link to page 25 link to page 25 link to page 28 link to page 28 link to page 28 link to page 34 link to page 34 link to page 35 MAX20343/MAX20344 Ultra-Low Quiescent Current, Low Noise 3.5W Buck-Boost Regulator TABLE OF CONTENTS General Description . 1 Applications . 1 Benefits and Features . 1 Simplified Block Diagram . 2 Absolute Maximum Ratings . 7 Package Information . 7 16-BUMP WLP . 7 12-Pin FC2QFN . 7 Electrical Characteristics . 8 Typical Operating Characteristics . 11 Pin Configurations . 16 I2C-Controlled WLP . 16 Single-Pin-Enabled WLP . 16 I2C-Controlled FC2QFN . 17 Single-Pin-Enabled FC2QFN . 17 Pin Description . 18 Functional Diagram . 20 Functional Diagram . 20 Detailed Description . 21 Startup Voltage . 21 Architectural Description . 21 Switching Phases . 21 Buck-Boost Mode . 21 Buck-Only Mode . 22 Inductor Peak and Valley Current Limits . 22 Integrator Control Loop Disable . 23 Input Operating Voltage . 23 Output Operating Power and Other Optimizations . 24 Device Control . 24 I2C-Controlled . 24 Single-Pin-Enabled . 25 Dynamic Voltage Scaling (DVS) . 25 RSEL Voltage Setting . 25 Register Map . 28 MAX20343/MAX20344 . 28 Register Details . 28 Applications Information . 34 Input and Output Capacitance . 34 Inductor Selection . 35 www.maximintegrated.com Maxim Integrated | 3 Document Outline General Description Applications Benefits and Features Simplified Block Diagram Absolute Maximum Ratings Package Information 16-BUMP WLP 12-Pin FC2QFN Electrical Characteristics Electrical Characteristics (continued) Typical Operating Characteristics Typical Operating Characteristics (continued) Pin Configurations I2C-Controlled WLP Single-Pin-Enabled WLP I2C-Controlled FC2QFN Single-Pin-Enabled FC2QFN Pin Description Pin Description (continued) Functional Diagram Functional Diagram Detailed Description Startup Voltage Architectural Description Switching Phases Buck-Boost Mode Buck-Only Mode Inductor Peak and Valley Current Limits Integrator Control Loop Disable Input Operating Voltage Output Operating Power and Other Optimizations Device Control I2C-Controlled Single-Pin-Enabled Dynamic Voltage Scaling (DVS) RSEL Voltage Setting Register Map MAX20343/MAX20344 Register Details ChipID (0x00) BBstCfg0 (0x01) BBstVSet (0x02) BBstISet (0x03) BBstCfg1 (0x04) Status (0x05) Int (0x06) Mask (0x07) LockMsk (0x50) LockUnlock (0x51) Applications Information Input and Output Capacitance Inductor Selection Soft-Start I2C Interface Slave Address Start, Stop, and Repeated Start Conditions Bit Transfer Single-Byte Write Burst Write Single Byte Read Burst Read Acknowledge Bits Register Values Typical Application Circuits Optical Heart Rate LED Supply LPWAN Radio Supply Ordering Information Revision History