Document Outline

• Figure 1. MAX8982A Typical Application Circuit and Functional Block Diagram
• Figure 2. MAX8982X Typical Application Circuit and Functional Block Diagram
• Figure 3. Power-On/Off State Diagram with IN3 Connected to BUCK2 Output and IN4 Connected to IN1_. Default PWR_REQ Regulators Are Shown.
• Figure 4. MAX8982A/MAX8982X Power-On Timing Diagram at Initial Startup with EN Connected to IN1_. BUCK3 and OUT8 Are for the MAX8982A Only.
• Figure 5. MAX8982A/MAX8982X Power-On Timing Diagram in PWR_REQ ON Mode After Power-Up
• Figure 6. Frequency Variation vs. Load Current with a 5V Input Supply
• Figure 7. DVS1 Logic Diagram
• Figure 8. BUCK1 Ramp-Up/Down Slope Control
• Figure 9. POR State Diagram
• Figure 10. Adding Series Resistors to Adjust LED Current
• Figure 11. Flash Timing Diagram
• Figure 12. I2C Bit Transfer
• Figure 13. START and STOP Conditions
• Figure 14. Master/Slave Configuration
• Figure 15. I2C Acknowledge
• Figure 16. I2C Timing Diagram
• Figure 17. Writing to the ICs
• Figure 18. Reading from the ICs
• Table 1. Summary of Power Supplies
• Table 2. External Component List for Figure 1
• Table 3. External Component List for Figure 2
• Truth Table
• Table 4. BUCK1 Ramp-Up/Down Slope Control Settings
• Table 5. Register Map
• Table 6. CHIPID Register
• Table 7. IRQM Register (Interrupt Mask)
• Table 8. IRQ Register
• Table 9. STATUS Register
• Table 10. LED1FT1 Register (LED1 (DR1) Flash Timer On/Off and TON Adjust)
• Table 11. LED1FT2 Register (LED1 (DR1) Flash Timer t1 Setting)
• Table 12. LED1FT3 Register (LED1 (DR1) Flash Timer t2 Setting)
• Table 13. LED1FT4 Register (LED1 (DR1) Flash Timer t3 Setting)
• Table 14. LED1FT5 Register (LED1 (DR1) Flash Timer t4 Setting)
• Table 15. LED1FT6 Register (LED1 (DR1) Flash Timer tP Setting)
• Table 16. LED2FT1 Register (LED2 (DR2) Flash Timer On/Off and tON Adjust)
• Table 17. LED2FT2 Register (LED2 (DR2) Flash Timer t1 Setting)
• Table 18. LED2FT3 Register (LED2 (DR2) Flash Timer t2 Setting)
• Table 19. LED2FT4 Register (LED2 (DR2) Flash Timer t3 Setting)
• Table 20. LED2FT5 Register (LED2 (DR2) Flash Timer t4 Setting)
• Table 21. LED2FT6 Register (LED2 (DR2) Flash Timer tP Setting)
• Table 22. LED3FT1 Register (LED3 (DR3) Flash Timer On/Off and tON Adjust)
• Table 23. LED3FT2 Register (LED3 (DR3) Flash Timer t1 Setting
• Table 24. LED3FT3 Register (LED3 (DR3) Flash Timer t2 Setting)
• Table 25. LED3FT4 Register (LED3 (DR3) Flash Timer t3 Setting)
• Table 26. LED3FT5 Register (LED3 (DR3) Flash Timer t4 Setting)
• Table 27. LED3FT6 Register (LED3 (DR3) Flash Timer tP Setting)
• Table 28. BUCK1 Register (On/Off Control for BUCK1)
• Table 29. BUCK1DVS1 Register (Output Voltage Setting for BUCK1 (DVS1 = Low))
• Table 30. BUCK1DVS2 Register (Output Voltage Setting for BUCK1 (DVS1 = High))
• Table 31. BUCK2 Register (On/Off Control for BUCK2)
• Table 32. LDO1 Register (On/Off Control for LDO1)
• Table 33. LDO1V Register (Output Voltage Setting for OUT1)
• Table 34. LDO2 Register (ON/OFF Control for LDO2)
• Table 35. LDO2V Register (Output Voltage Setting for OUT2)
• Table 36. LDO3 Register (On/Off Control for LDO3)
• Table 37. LDO3V Register (Output Voltage Setting for OUT3)
• Table 38. LDO4 Register (On/Off Control for LDO4)
• Table 39. LDO4V Register (Output Voltage Setting for OUT4)
• Table 40. LDO5 Register (On/Off Control for LDO5)
• Table 41. LDO5V Register (Output Voltage Setting for OUT5)
• Table 42. LDO6 Register (On/Off Control for LDO6)
• Table 43. LDO6V Register (Output Voltage Setting for OUT6)
• Table 44. VSIM Register (On/Off Control for VSIM (LDO7))
• Table 45. VSIMV Register (Output Voltage Setting for VSIM)
• Table 46. LDO8 Register (On/Off Control for LDO8)
• Table 47. LDO8V Register (Output Voltage Setting for OUT8)
• Table 48. LDO9 Register (On/Off Control for LDO9)
• Table 49. LDO9V Register (Output Voltage Setting for OUT9)
• Table 50. LED_EN Register (On/Off Control for 3 Current Regulators)
• Table 51. On/Off Register (On/Off Control for BUCK3, BUCK4, and the Internal 32kHz Clock)
• Table 52. BUCK3 Register (Output Voltage Setting for BUCK3)
• Table 53. BUCK4 Register (Output Voltage Setting for BUCK4)
• Table 54. CURRENTREG1 Register (Current Setting for Current Regulators DR1 and DR2)
• Table 55. CURRENTREG2 Register (Current Setting for Current Regulator DR3)
• Table 56. RAMP Register (Slope Setting for BUCK1)
• Table 57. BUCK1-4ADIS Register (Active Discharge Settings for BUCK1–BUCK4)
• Table 58. LDO1-8ADIS Register (Active Discharge Settings for LDO1–LDO8)
• Table 59. LDO9ADIS Register (Active Discharge Setting for LDO9)
• Table 60. Recommended Inductors
• General Description
• Applications
• Features
• Ordering Information
• Absolute Maximum Ratings
• General Electrical Characteristics
• Buck1 Electrical Characteristics
• Buck2 Electrical Characteristics
• Buck3 Electrical Characteristics
• Buck4 Electrical Characteristics
• OUT1 (LDO1) Electrical Characteristics
• OUT2 (LDO2) Electrical Characteristics
• OUT3 (LDO3) Electrical Characteristics
• OUT4 (LDO4) Electrical Characteristics
• OUT5 (LDO5) Electrical Characteristics
• OUT6 (LDO6) Electrical Characteristics
• VSIM (LDO7) Electrical Characteristics
• OUT8 (LDO8) Electrical Characteristics
• OUT9 (LDO9) Electrical Characteristics
• RESET Electrical Characteristics
• IRQ Electrical Characteristics
• Current Regulator Electrical Characteristics
• Flash Timer Electrical Characteristics
• N32kHz Electrical Characteristics
• Typical Operating Characteristics
• Pin Configurations
• Pin Description
• Detailed Description
  • Power-On/Off Control
    • PWR_REQ
  • Active Discharge
  • BUCK1, BUCK2, and BUCK3 Step-Down Converters
  • Setting the Output Voltage on BUCK1
  • Dynamic Voltage Scaling (DVS) Function on Buck 1
  • Ramp-Up/Down Slope Control on BUCK1
  • Setting the Output Voltage on BUCK2
  • Setting the Output Voltage on BUCK3
  • BUCK4 Step-Down Converter for PA (Power Amplifier)
  • Setting the Output Voltage on BUCK4
  • Linear Regulators
  • Reference Bypass (REFBP)
  • Thermal Overload Protection
  • Undervoltage Lockout (UVLO)
  • Overvoltage Protection (OVP)
  • Power-On Reset (POR)
  • Current Regulators (DR1, DR2, DR3)
  • Embedded Flash Timer
  • IRQ Description
  • RESET SIGNAL to B/B Chipset
  • I2C Serial Interface
    • Bit Transfer
    • START and STOP Conditions
    • System Configuration
    • Acknowledge
    • Slave Address
    • Write Operations
    • Read Operations
• Applications Information
  • Inductor Selection
  • Output Capacitor Selection
  • Input Capacitor Selection
  • PCB Layout Guidelines
• Chip Information
• Package Information
• Revision History