Rainbow Electronics MAX8982X User Manual

General description, Applications, Features

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Table of contents

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