Datasheet MAX20343, MAX20344 (Maxim) - 5

link to page 21 link to page 21 link to page 22 link to page 23 link to page 23 link to page 26 link to page 34 link to page 36 link to page 36 link to page 36 link to page 37 link to page 37 link to page 38 link to page 38 MAX20343/MAX20344 Ultra-Low Quiescent Current, Low Noise 3.5W Buck-Boost Regulator LIST OF FIGURES Figure 1. The Buck-Boost Regulator and Switching Phases . 21 Figure 2. Buck-Boost Inductor Current in Buck-Boost Mode . 21 Figure 3. Buck-Boost Inductor Current in Buck-Only Mode . 22 Figure 4. Minimum BBstIPSet2 Limit for Given BBstIPSet1 Setting . 23 Figure 5. Recommended BBstIPSet1 and BBstIPSet2 Settings . 23 Figure 6. MAX20343/MAX20344 RSEL Startup Sequence . 26 Figure 7. Buck-Boost Required Minimum Input/Output Capacitance . 34 Figure 8. I2C START, STOP, and REPEATED START Conditions . 36 Figure 9. Write Byte Sequence . 36 Figure 10. Burst Write Sequence . 37 Figure 11. Read Byte Sequence . 37 Figure 12. Burst Read Sequence . 38 Figure 13. Acknowledge Bits . 38 www.maximintegrated.com Maxim Integrated | 5 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