Rainbow Electronics MAX8982X User Manual
General description, Applications, Features
EVALUATION KIT
AVAILABLE
_______________________________________________________________ Maxim Integrated Products 1
For pricing, delivery, and ordering information, please contact Maxim Direct at 1-888-629-4642,
or visit Maxim’s website at www.maxim-ic.com.
Power-Management ICs for
ICERA E400/E450 Platform MAX8982A/MAX8982X
19-5472; Rev 1; 1/11
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel. These devices have a minimum order inc-
rement of 1k pieces.
General Description
The MAX8982A/MAX8982X are complete power-man-
agement ICs for the latest LTE/WCDMA/GSM/GPRS/
EDGE data card based on the new ICERA platform (E400/
E450). The MAX8982A operates from a 4.1V to 5.5V
supply and contains four efficient step-down converters,
nine low dropout linear regulators (LDOs) to power all
RF and baseband circuitry, three current regulators with
programmable current up to 24mA and embedded flash
timers, and an I
2
C serial interface to program individual
regulator output voltages as well as on/off control for flex-
ibility. The linear regulators provide greater than 60dB
PSRR, less than 45FV of output noise, and minimal cross
coupling noise between LDOs.
The MAX8982X operates from a 2.9V to 5.5V supply. The
MAX8982X has the same features as the MAX8982A,
except it does not have BUCK3, BUCK4, and LDO8.
All buck converters and LDOs are enabled/disabled by
either I
2
C or PWR_REQ control signal after power-up.
This feature provides more flexibility in system design.
Applications
GSM, GPRS, EDGE, WCDMA, and LTE
Data Card with New ICERA Platform (E400/E450)
Features
S
4 High-Efficiency Buck Converters
0.9V at 1.2A for CORE with DVS Function (0.6V
to 1.2V in 25mV Steps) and Slew Rate Control
1.8V at 600mA for System IO
3.2V at 600mA for All LDO Inputs (2.9V to 3.65V
in 50mV Steps) (MAX8982A Only)
3.4V at 1.8A for GSM/WCDMA PA (3.0V to 3.75V
in 50mV Steps) (MAX8982A Only)
S
9 LDO Linear Regulators
2.7V at 300mA on LDO1 for RF Transceiver
1.8V at 150mA on LDO2 for RF Transceiver
2.8V at 150mA on LDO3 for Analogue BB
0.9V at 50mA on LDO4 for BB PLL with the
Separate Input for a Higher Efficiency
3.0V at 150mA on LDO5 for SD Card
2.7V at 150mA on LDO6 for TCXO
1.8V or 3.0V at 150mA on LDO7 for SIM
3.0V at 150mA on LDO8 for USB with the
Separate Input (MAX8982A Only)
0.9V at 50mA on LDO9 for BB with the Separate
Input for a Higher Efficiency
S
32 Programmable Voltage Options and External
Input on BUCK1 (0.9V Default) for DVS
S
16 Programmable Voltage Options for BUCK3
(MAX8982A Only)
S
16 Programmable Voltage Options on BUCK4
(MAX8982A Only)
S
Programmable Voltage Options for All LDOs
(LDO8 for MAX8982A Only)
S
BUCK2, BUCK3 (MAX8982A Only), LDO3, and
Internal 32kHz Clock Default On at Initial Startup
S
Some Buck Converters and LDOs are Enabled by
Either I
2
C or Power Request Control (PWR_REQ)
After Power-Up
S
3 Current Regulators with 8 Dimming Current
Options Up to 24mA with Embedded Flash Timer
Ordering Information
PART
TEMP RANGE
PIN-PACKAGE
MAX8982AEWO+T
-40
°C to +85°C
42 WLP
MAX8982XEWO+T
-40
°C to +85°C
42 WLP
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
- 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
- Applications Information
- Chip Information
- Package Information
- Revision History