Rainbow Electronics MAX8982X User Manual
19-5472; Rev 1; 1/11
EVALUATION KIT
AVAILABLE
Power-Management ICs for
ICERA E400/E450 Platform
General Description
The MAX8982A/MAX8982X are complete power-management 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
regulator output voltages as well as on/off control for flexibility. 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
This feature provides more flexibility in system design.
2
C or PWR_REQ control signal after power-up.
Applications
GSM, GPRS, EDGE, WCDMA, and LTE
Data Card with New ICERA Platform (E400/E450)
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
+Denotes a lead(Pb)-free/RoHS-compliant package.
T = Tape and reel. These devices have a minimum order inc-
rement of 1k pieces.
2
C serial interface to program individual
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)
9 LDO Linear Regulators
S
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
32 Programmable Voltage Options and External
S
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
After Power-Up
S 3 Current Regulators with 8 Dimming Current
Options Up to 24mA with Embedded Flash Timer
2
C or Power Request Control (PWR_REQ)
MAX8982A/MAX8982X
_______________________________________________________________ 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
Table of ConTenTs
General Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Applications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Features . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 1
Absolute Maximum Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
General Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7
Buck1 Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 9
Buck2 Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Buck3 Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10
Buck4 Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11
OUT1 (LDO1) Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
OUT2 (LDO2) Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 12
OUT3 (LDO3) Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 13
OUT4 (LDO4) Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
MAX8982A/MAX8982X
OUT5 (LDO5) Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14
OUT6 (LDO6) Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
VSIM (LDO7) Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15
OUT8 (LDO8) Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
OUT9 (LDO9) Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 16
RESET Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
IRQ Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Current Regulator Electrical Characteristics. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 17
Flash Timer Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18
N32kHz Electrical Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Typical Operating Characteristics . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19
Pin Configurations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 25
Pin Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 27
Detailed Description . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Power-On/Off Control . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
PWR_REQ . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Active Discharge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
BUCK1, BUCK2, and BUCK3
Step-Down Converters . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Setting the Output Voltage on BUCK1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Dynamic Voltage Scaling (DVS) Function on Buck 1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
2
Power-Management ICs for
ICERA E400/E450 Platform
Table of ConTenTs (ConTinued)
Ramp-Up/Down Slope Control on BUCK1 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Setting the Output Voltage on BUCK2 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Setting the Output Voltage on BUCK3 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
BUCK4 Step-Down Converter for PA (Power Amplifier) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .38
Setting the Output Voltage on BUCK4 . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Linear Regulators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Reference Bypass (REFBP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Thermal Overload Protection. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Undervoltage Lockout (UVLO) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Overvoltage Protection (OVP) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Power-On Reset (POR) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Current Regulators (DR1, DR2, DR3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
Embedded Flash Timer. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
IRQ Description. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .39
RESET SIGNAL to B/B Chipset. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2
C Serial Interface . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .40
I
Bit Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
START and STOP Conditions. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
System Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Slave Address . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .42
Write Operations. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Read Operations . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .43
Applications Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Inductor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
Output Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Input Capacitor Selection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
PCB Layout Guidelines . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Chip Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 71
Package Information. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 72
Revision History . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 73
MAX8982A/MAX8982X
3
Power-Management ICs for
ICERA E400/E450 Platform
Table of ConTenTs (ConTinued)
List of Figures
Figure 1. MAX8982A Typical Application Circuit and Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 31
Figure 2. MAX8982X Typical Application Circuit and Functional Block Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . 33
Figure 3. Power-On/Off State Diagram with IN3 Connected to BUCK2 Output and IN4 Connected to IN1_.
Default PWR_REQ Regulators Are Shown.. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 35
Figure 4. MAX8982A/MAX8982X Power-On Timing Diagram at Initial Startup with EN Connected to IN1_.
BUCK3 and OUT8 Are for the MAX8982A Only. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 36
Figure 5. MAX8982A/MAX8982X Power-On Timing Diagram in PWR_REQ ON Mode After Power-Up . . . . . . . . . . 37
Figure 6. Frequency Variation vs. Load Current with a 5V Input Supply . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 7. DVS1 Logic Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Figure 8. BUCK1 Ramp-Up/Down Slope Control. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Figure 9. POR State Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 10. Adding Series Resistors to Adjust LED Current . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
Figure 11. Flash Timing Diagram . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 39
MAX8982A/MAX8982X
Figure 12. I
Figure 13. START and STOP Conditions . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
Figure 14. Master/Slave Configuration . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
Figure 15. I
Figure 16. I
Figure 17. Writing to the ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
Figure 18. Reading from the ICs . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 43
2
C Bit Transfer . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 40
2
C Acknowledge . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 41
2
C Timing Diagram. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 42
List of Tables
Table 1. Summary of Power Supplies. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 29
Table 2. External Component List for Figure 1. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 32
Table 3. External Component List for Figure 2. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 34
Truth Table . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 37
Table 4. BUCK1 Ramp-Up/Down Slope Control Settings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 38
Table 5. Register Map . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 44
Table 6. CHIPID Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 7. IRQM Register (Interrupt Mask) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 45
Table 8. IRQ Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 9. STATUS Register . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 10. LED1FT1 Register (LED1 (DR1) Flash Timer On/Off and TON Adjust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . 46
Table 11. LED1FT2 Register (LED1 (DR1) Flash Timer t
Table 12. LED1FT3 Register (LED1 (DR1) Flash Timer t
Table 13. LED1FT4 Register (LED1 (DR1) Flash Timer t
4
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
1
Setting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
2
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 47
3
Power-Management ICs for
ICERA E400/E450 Platform
Table of ConTenTs (ConTinued)
Table 14. LED1FT5 Register (LED1 (DR1) Flash Timer t4 Setting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
Table 15. LED1FT6 Register (LED1 (DR1) Flash Timer t
Table 16. LED2FT1 Register (LED2 (DR2) Flash Timer On/Off and t
Table 17. LED2FT2 Register (LED2 (DR2) Flash Timer t
Table 18. LED2FT3 Register (LED2 (DR2) Flash Timer t
Table 19. LED2FT4 Register (LED2 (DR2) Flash Timer t
Table 20. LED2FT5 Register (LED2 (DR2) Flash Timer t
Table 21. LED2FT6 Register (LED2 (DR2) Flash Timer t
Table 22. LED3FT1 Register (LED3 (DR3) Flash Timer On/Off and t
Table 23. LED3FT2 Register (LED3 (DR3) Flash Timer t
Table 24. LED3FT3 Register (LED3 (DR3) Flash Timer t
Table 25. LED3FT4 Register (LED3 (DR3) Flash Timer t
Table 26. LED3FT5 Register (LED3 (DR3) Flash Timer t
Table 27. LED3FT6 Register (LED3 (DR3) Flash Timer t
Table 28. BUCK1 Register (On/Off Control for BUCK1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
Table 29. BUCK1DVS1 Register (Output Voltage Setting for BUCK1 (DVS1 = Low)) . . . . . . . . . . . . . . . . . . . . . . . . . 53
Table 30. BUCK1DVS2 Register (Output Voltage Setting for BUCK1 (DVS1 = High)) . . . . . . . . . . . . . . . . . . . . . . . . . 54
Table 31. BUCK2 Register (On/Off Control for BUCK2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 32. LDO1 Register (On/Off Control for LDO1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 33. LDO1V Register (Output Voltage Setting for OUT1). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 55
Table 34. LDO2 Register (ON/OFF Control for LDO2). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 35. LDO2V Register (Output Voltage Setting for OUT2) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 36. LDO3 Register (On/Off Control for LDO3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 56
Table 37. LDO3V Register (Output Voltage Setting for OUT3). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 38. LDO4 Register (On/Off Control for LDO4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 57
Table 39. LDO4V Register (Output Voltage Setting for OUT4). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 40. LDO5 Register (On/Off Control for LDO5) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 58
Table 41. LDO5V Register (Output Voltage Setting for OUT5). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 42. LDO6 Register (On/Off Control for LDO6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 59
Table 43. LDO6V Register (Output Voltage Setting for OUT6) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 44. VSIM Register (On/Off Control for VSIM (LDO7)). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 60
Table 45. VSIMV Register (Output Voltage Setting for VSIM) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 46. LDO8 Register (On/Off Control for LDO8) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 61
Table 47. LDO8V Register (Output Voltage Setting for OUT8). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 48. LDO9 Register (On/Off Control for LDO9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 62
Table 49. LDO9V Register (Output Voltage Setting for OUT9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Table 50. LED_EN Register (On/Off Control for 3 Current Regulators) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 63
Setting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
P
Adjust) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 48
ON
Setting). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
1
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
2
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 49
3
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
4
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
P
Adjust). . . . . . . . . . . . . . . . . . . . . . . . . . . . . 50
ON
Setting . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
1
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
2
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 51
3
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
4
Setting) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 52
P
MAX8982A/MAX8982X
5
Power-Management ICs for
ICERA E400/E450 Platform
Table of ConTenTs (ConTinued)
Table 51. On/Off Register (On/Off Control for BUCK3, BUCK4, and the Internal 32kHz Clock) . . . . . . . . . . . . . . . . . 64
Table 52. BUCK3 Register (Output Voltage Setting for BUCK3) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 64
Table 53. BUCK4 Register (Output Voltage Setting for BUCK4) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 65
Table 54. CURRENTREG1 Register (Current Setting for Current Regulators DR1 and DR2) . . . . . . . . . . . . . . . . . . . 66
Table 55. CURRENTREG2 Register (Current Setting for Current Regulator DR3). . . . . . . . . . . . . . . . . . . . . . . . . . . . 66
Table 56. RAMP Register (Slope Setting for BUCK1) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 57. BUCK1-4ADIS Register (Active Discharge Settings for BUCK1–BUCK4) . . . . . . . . . . . . . . . . . . . . . . . . . . 67
Table 58. LDO1-8ADIS Register (Active Discharge Settings for LDO1–LDO8). . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 59. LDO9ADIS Register (Active Discharge Setting for LDO9) . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 68
Table 60. Recommended Inductors . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 69
MAX8982A/MAX8982X
6
Power-Management ICs for
ICERA E400/E450 Platform
ABSOLUTE MAXIMUM RATINGS
V
, V
DDA
REFBP, BUCK1, BUCK2, BUCK3, BUCK4,
EN to GND ...............................-0.3V to (V
SDA, SCL, PWR_REQ, DVS1, IRQ, RESET, IN3,
N32kHz to GND .............................. -0.3V to (V
OUT1, OUT2 to GND ............................. -0.3V to (V
OUT3, OUT5, OUT6, VSIM to GND ....... -0.3V to (V
OUT8 to GND ........................................... -0.3V to (V
OUT4, OUT9 to GND ............................... -0.3V to (V
PGND1, PGND2, PGND3, PGND4 to GND .........-0.3V to +0.3V
DR1, DR2, DR3 to GND ..........................-0.3V to (V
Note 1: LX1–LX4 have internal clamp diodes to PGND_, IN1A, and IN1B. Applications that forward bias this diode should take
Note 2: Package thermal resistance was obtained using the method described in JEDEC specification JESD51-7, using a four-
Stresses beyond those listed under “Absolute Maximum Ratings” may cause permanent damage to the device. These are stress ratings only, and functional
operation of the device at these or any other conditions beyond those indicated in the operational sections of the specifications is not implied. Exposure to absolute
maximum rating conditions for extended periods may affect device reliability.
, IN4, IN1A, IN1B to GND ....................-0.3V to +6V
DDB
BUCK2
DDA
DDB
IN4
IN3
IN1_
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
+ 0.3V)
IN1A, VIN1B
care not to exceed the power dissipation limits of the device.
layer board. For detailed information on package thermal considerations, refer to www.maxim-ic/thermal-tutorial.
GENERAL ELECTRICAL CHARACTERISTICS
(MAX8982A: V
C
= 0.1FF, T
REFBP
PARAMETER CONDITIONS MIN TYP MAX UNITS
IN1A, IN1B, IN4 ESD Protection
Shutdown Supply Current
(Note 4)
No Load Supply Current
Loaded Supply Current
IN1A
= V
A
= +5.0V and C
IN1B
= -40NC to +85NC. Typical values are at T
OUT1,2,3+CIN_
Module level ESD protection, in-circuit tested with 0.1FF
ceramic capacitor
EN = GND 10 FA
MAX8982A, V
output), all other regulators off
MAX8982X, V
other regulators off
MAX8982A, V
BUCK2 on (default output), BUCK3 on (default output),
all LDOs (except LDO8) default output ON
MAX8982X, V
BUCK2 on (default output), all LDOs (except LDO8)
default output ON
MAX8982A, V
(default output) with 200FA load, BUCK3 on (default
output), OUT3 on (default output) with 20FA load, OUT2
on (default output) with 100FA load, V
50FA load, OUT8 on (default output) with 100FA load
MAX8982X, V
(default output) with 200FA load, OUT3 on (default
output) with 20FA load, OUT2 on (default output) with
100FA load, V
= 1000FF, MAX8982X: V
= V
EN
IN1_
= V
EN
IN1_
= V
EN
IN1_
= V
EN
IN1_
= V
EN
IN1_
= V
EN
IN1_
= 3.0V with 50FA load
VSIM
LX1 Continuous Current (Note 1) ...................................1200mA
LX2, LX3 Continuous Current (Note 1) ............................600mA
LX4 Continuous Current (Note 1) ...................................1800mA
Continuous Power Dissipation (T
7x6 42-Bump WLP, 0.5mm Pitch, 3.75mm x 3.20mm
(derate 27.8mW/NC above +70NC) ................................ 2.22W
Junction-to-Ambient Thermal Resistance (B
(Note 2) ........................................................................36NC/W
Operating Temperature Range .......................... -40NC to +85NC
Junction Temperature .....................................................+150NC
Storage Temperature Range ............................ -65NC to +150NC
Soldering Temperature (reflow) ......................................+260NC
V
IN1A
= +25NC, unless otherwise noted.) (Note 3)
A
, BUCK3 and OUT3 on (default
, OUT3 on (default output), all
, BUCK1 on (default output),
, BUCK1 on (default output),
, 32kHz clock on, BUCK2 on
= 3.0V with
VSIM
, 32kHz clock on, BUCK2 on
=
IN1B
= +70NC)
A
= +3.3V and C
Q10 kV
300
300
600
600
1000
1000
)
JA
UT1,2,3+CIN_
O
= 20FF,
FA
FA
MAX8982A/MAX8982X
7
Power-Management ICs for
ICERA E400/E450 Platform
GENERAL ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A: V
C
= 0.1FF, T
REFBP
PARAMETER CONDITIONS MIN TYP MAX UNITS
OPERATING VOLTAGE
IN1A, IN1B Operating Voltage
Undervoltage Lockout
OVERVOLTAGE LOCKOUT (OVP)
Overvoltage Lockout
(Shutdown All Outputs Including
LDO7)
IN1A, IN1B
Hysteresis
THERMAL SHUTDOWN
MAX8982A/MAX8982X
Threshold T
Hysteresis 10 NC
HOT TEMPERATURE DETECTION
Threshold Interrupt enabled, T
REFERENCE
REFBP Output Voltage 0 P I
Supply Rejection 4.1V P V
LOGIC AND CONTROL INPUTS (SDA, SCL, EN, DVS1, PWR_REQ)
Input Low Level T
Input High Level T
Logic Input Current
LOGIC AND CONTROL OUTPUTS
SDA Output Low Level I
2
I
C INTERFACE (V
Clock Frequency 400 kHz
Bus Free Time Between START
and STOP (t
Hold Time Repeated START
Condition (t
SCL Low Period (t
SCL High Period (t
Setup Time Repeated START
Condition (t
SDA Hold Time (t
SDA Setup Time (t
= V
IN1A
= -40NC to +85NC. Typical values are at T
A
Overvoltage
SCL
)
BUF
)
HD_STA
LOW
HIGH
)
SU_STA
HD_DAT
SU_DAT
= +5.0V and C
IN1B
= V
) 1.3 Fs
= 1.8V, Note 2, Figure 16)
SDA
) 0.6 Fs
) 0 Fs
) 100 ns
OUT1,2,3+CIN_
MAX8982A 4.1 5.5
MAX8982X 2.9 5.5
MAX8982A, V
MAX8982A, V
MAX8982X, V
MAX8982X, V
V
rising 5.75 5.93 V
IN1_
rising 160 NC
J
P 1FA 0.788 0.80 0.812 V
REFBP
IN1_
= +25NC 0.3 V
A
= +25NC 1.2 V
A
0V < V
0V < V
SDA
< 5.5V, TA = +25NC -1 +1
IN1_
< 5.5V, TA = +85NC 0.1
IN1_
= 6mA 0.4 V
= 1000FF, MAX8982X: V
= +25NC, unless otherwise noted.) (Note 3)
A
rising 3.5 3.8 4.1
IN1_
falling 3.5
IN1_
rising 2.5 2.7 2.9
IN1_
falling 2.4
IN1_
rising, typical hysteresis = +10NC +125 NC
J
P 5.5V 0.2 mV
IN1A
=
V
IN1B
= +3.3V and C
1.3 Fs
0.6 Fs
0.6 Fs
UT1,2,3+CIN_
O
250 mV
= 20FF,
V
V
FA
8
Power-Management ICs for
ICERA E400/E450 Platform
GENERAL ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A: V
C
= 0.1FF, T
REFBP
PARAMETER CONDITIONS MIN TYP MAX UNITS
Maximum Pulse Width of Spikes
that Must be Suppressed by the
Input Filter of Both SDA and SCL
Signals
Setup Time for STOP Condition
(t
SU_STO
)
BUCK1 ELECTRICAL CHARACTERISTICS
(MAX8982A: V
C
= 0.1µF, C
REFBP
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current (Note 4) No load, no switching 65 FA
Default Output Voltage I
Output Voltage Accuracy
Maximum Output Current V
Current Limit
On-Resistance
Ramp-Up/Down Rate Control Same for both up and down
Rectifier Off Current Threshold 40 mA
Minimum On-Time t
Minimum Off-Time t
Efficiency (Note 4) V
Shutdown Output Resistance
(Active Discharge Resistance)
Output Load Regulation Equal to inductor DC resistance divided by 4 R
IN1A
IN1A
= V
A
= V
OUT
= +5.0V and C
IN1B
= -40NC to +85NC. Typical values are at T
= +5.0V and C
IN1B
= 10µF, L = 2.2µH, TA = -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
OUT1,2,3+CIN_
OUT1,2,3+CIN_
= 100mA 0.873 0.9 0.927 V
LOAD
I
= 100mA, V
LOAD
1.2V in production (0.6V to 1.2V in 25mV steps)
= 0.9V, TA = +25NC 1200 mA
BUCK1
pFET switch 1400 1800 2500
nFET rectifier 1000 1400 1900
pFET switch, I
nFET rectifier, I
ON
OFF
= 0.9V, I
BUCK1
2
I
C programmable, default OFF 1 kI
= 1000FF, MAX8982X: V
= +25NC, unless otherwise noted.) (Note 3)
A
= 1000µF, MAX8982X: V
tested at 0.6V, 0.775V, 1V,
BUCK1
= -150mA 0.3
LX1
= 150mA 0.15
LX1
RASD1[0:1] = 00 5
RASD1[0:1] = 01 10
RASD1[0:1] = 10
RASD1[0:1] = 11 25
= 400mA 85 %
LOAD
IN1A
IN1A
=
= V
V
= +3.3V and C
IN1B
= +3.3V and C
IN1B
0.6 Fs
-3 +3 %
UT1,2,3+CIN_
O
50 ns
OUT1,2,3+CIN_
12.5
(default)
40 ns
40 ns
/4 V/A
L
= 20FF,
= 20µF,
MAX8982A/MAX8982X
mA
I
mV/
Fs
9
Power-Management ICs for
ICERA E400/E450 Platform
BUCK2 ELECTRICAL CHARACTERISTICS
(MAX8982A: V
C
= 0.1FF, C
REFBP
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current (Note 4) No load, no switching 26 FA
Output Voltage I
Output Current V
Current Limit
On-Resistance
Rectifier Off Current Threshold 40 mA
Minimum On-Time t
Minimum Off-Time t
Efficiency (Note 4) V
Shutdown Output Resistance
(Active Discharge Resistance)
Output Load Regulation Equal to inductor DC resistance divided by 4 R
MAX8982A/MAX8982X
IN1A
V
= +5.0V and C
IN1B
=
OUT
= 2.2FF, L = 1FH, T
OUT1,2,3+CIN_
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
= 100mA 1.746 1.8 1.854 V
LOAD
= 1.8V, TA = +25NC 600 mA
BUCK2
pFET switch 700 1100 1500
nFET rectifier 500 750 1200
pFET switch, I
nFET rectifier, I
ON
OFF
= 1.8V, I
BUCK2
2
I
C programmable, default ON 100
= 1000FF, MAX8982X: V
= -150mA 0.65
LX2
= 150mA 0.3
LX2
= 250mA 85 %
LOAD
IN1A
= V
= +3.3V and C
IN1B
OUT1,2,3+CIN_
= +25NC.) (Note 3)
A
70 ns
70 ns
/4 V/A
L
= 20FF,
mA
I
I
BUCK3 ELECTRICAL CHARACTERISTICS
(MAX8982A only, V
+85NC, unless otherwise noted. Typical values are at T
PARAMETER CONDITIONS MIN TYP MAX UNITS
Supply Current (Note 4) No load, no switching 40 FA
Default Output Voltage I
Programmable Output Voltage
Maximum Output Current V
Efficiency (Note 4) V
IN1A
=
V
IN1B
= +5.0V, C
LOAD
I
LOAD
programmable output voltage step = 50mV
OUT1,2,3+CIN_
= 100mA 3.10 3.2 3.29 V
= 100mA,
= 3.2V, TA = +25NC 600 mA
BUCK3
= 3.2V, I
BUCK3
= 1000FF, C
= +25NC.) (Note 3)
A
= 300mA 90 %
LOAD
REFBP
= 0.1FF, C
= 2.2FF, L = 2.2FH, T
OUT
2.90
2.95
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
3.65
= -40NC to
A
V
10
Power-Management ICs for
ICERA E400/E450 Platform
BUCK3 ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A only, V
+85NC, unless otherwise noted. Typical values are at T
PARAMETER CONDITIONS MIN TYP MAX UNITS
Current Limit
On-Resistance
Rectifier Off Current Threshold 80 mA
Minimum On-Time t
Minimum Off-Time t
Shutdown Output Resistance
(Active Discharge Resistance)
IN1A
=
V
IN1B
= +5.0V, C
pFET switch 700 1100 1500
nFET rectifier 500 750 1200
pFET switch, I
nFET rectifier, I
ON
OFF
2
I
OUT1,2,3+CIN_
LX3
LX3
C programmable, default off 1 kI
BUCK4 ELECTRICAL CHARACTERISTICS
(MAX8982A only, V
unless otherwise noted. Typical values are at T
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage I
Programmable Output Voltage
Efficiency (Note 4) V
Maximum Output Current 1800 mA
p-Channel On-Resistance I
n-Channel On-Resistance I
p-Channel Current-Limit Threshold 2700 mA
n-Channel Negative Current Limit 1500 mA
Maximum Duty Cycle 100 %
Minimum Duty Cycle 16.5 %
PWM Frequency f
Shutdown Output Resistance
(Active Discharge Resistance)
IN1A
= V
IN1B
= +5.0V, C
OUT1,2,3+CIN_
= +25NC.) (Note 3)
A
= 100mA 3.298 3.40 3.502 V
LOAD
= 100mA,
I
LOAD
programmable output voltage step = 50mV
= 3.4V, I
BUCK4
= 150mA 100 mI
LX4
= 150mA 100 mI
LX4
OSC
2
I
C programmable,
default off
= 1000FF, C
= +25NC.) (Note 3)
A
= -150mA 0.65
= 150mA 0.3
= 1000FF, C
= 500mA 90 %
LOAD
REFBP
REFBP
= 0.1FF, C
= 0.1FF, C
OUT
= 2.2FF, L = 2.2FH, T
OUT
70 ns
70 ns
= 20FF, L = 1FH, T
3.00
3.05
3.10
3.15
3.20
3.25
3.30
3.35
3.40
3.45
3.50
3.55
3.60
3.65
3.70
3.75
1.8 2.0 2.2 MHz
= -40NC to +85NC,
A
1 kI
= -40NC to
A
MAX8982A/MAX8982X
mA
I
V
11
Power-Management ICs for
ICERA E400/E450 Platform
OUT1 (LDO1) ELECTRICAL CHARACTERISTICS
(MAX8982A: V
= -40NC to +85NC, unless otherwise noted. Typical values are at T
T
A
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage I
Maximum Output Current 300 mA
Current Limit (Note 4) V
Dropout Voltage (Note 4) I
Line Regulation 2.9V P V
Load Regulation 1mA < I
Transient Response
Power-Supply Rejection
DV
/DV
OUT
Output Noise Voltage 100Hz to 100kHz, I
MAX8982A/MAX8982X
Programmable Output Voltages I
Startup Time from Shutdown
(Note 4)
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
DDA
IN
= +3.2V and C
= 10FF, MAX8982X: V
VDD_
= 50mA 2.619 2.70 2.781 V
LOAD
= 90% of its regulation 310 550 940 mA
OUT1
LOAD
di/dt = I
= 200mA, T
DDA
LOAD
/0.1Fs, 1kHz < 1/T < 0.5MHz, where T is the
MAX
= +85NC 50 100 mV
A
P 3.65V, I
LOAD
< 300mA 12 mV
period of step load, 1mA to 300mA
f = 10Hz to 10kHz, I
LOAD
LOAD
= +3.3V and C
DDA
= +25NC.) (Note 3)
A
VDD_
= 20FF, C
REFBP
= 0.1FF, C
= 150mA 2.4 mV
50 mV
= 30mA 60 dB
= 30mA 45 FV
2.65
2.70
2.75
LOAD
= 50mA
2.80
2.85
2.90
2.95
3.00
= 300mA 40 100 Fs
I
LOAD
I
= 300mA 3 50 mV
LOAD
2
I
C programmable, default off 100
OUT1
= 4.7FF,
RMS
V
I
OUT2 (LDO2) ELECTRICAL CHARACTERISTICS
(MAX8982A: V
T
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage I
Maximum Output Current 150 mA
Current Limit (Note 4) V
Dropout Voltage (Note 4) I
Line Regulation 2.9V P V
Load Regulation 50FA < I
Power-Supply Rejection
DV
/DV
OUT
Output Noise Voltage 100Hz to 100kHz, I
12
DDA
IN
= +3.2V and C
= 10FF, MAX8982X: V
VDD_
= 50mA 1.746 1.80 1.854 V
LOAD
= 90% of its nominal regulation voltage 165 360 650 mA
OUT2
= 100mA, TA =+85NC 150 300 mV
LOAD
P 3.65V, I
DDA
< 150mA 25 mV
LOAD
f = 10Hz to 10kHz, I
LOAD
LOAD
LOAD
= +3.3V and C
DDA
= +25NC.) (Note 3)
A
VDD_
= 20FF, C
REFBP
= 0.1FF, C
= 100mA 2.4 mV
= 30mA 60 dB
= 30mA 45 FV
OUT2
= 1FF,
RMS
Power-Management ICs for
ICERA E400/E450 Platform
OUT2 (LDO2) ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A: V
T
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
PARAMETER CONDITION MIN TYP MAX UNITS
Programmable Output Voltages I
Startup Time from Shutdown
(Note 4)
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
OUT3 (LDO3) ELECTRICAL CHARACTERISTICS
(MAX8982A: V
T
= -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
A
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage I
Maximum Output Current 150 mA
Current Limit (Note 4) V
Dropout Voltage I
Line Regulation 3.2V P V
Load Regulation 50FA < I
Power-Supply Rejection
DV
/DV
OUT
Output Noise Voltage 100Hz to 100kHz, I
Programmable Output Voltage I
Startup Time from Shutdown
(Note 4)
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
DDA
DDB
IN
= +3.2V and C
= +3.2V and C
= 10FF, MAX8982X: V
VDD_
= 50mA
LOAD
= 150mA 40 100 Fs
I
LOAD
I
= 150mA 3 50 mV
LOAD
2
I
C programmable, default off 100
= 10FF, MAX8982X: V
VDD_
= 50mA 2.716 2.800 2.884 V
LOAD
= 90% of its regulation 165 360 650 mA
OUT3
= 100mA, T
LOAD
DDB
LOAD
f = 10Hz to 10kHz, I
= 50mA
LOAD
= 150mA 100 Fs
I
LOAD
I
= 150mA 50 mV
LOAD
2
I
C programmable, default off 100
= +85NC 150 300 mV
A
P 3.65V, I
< 150mA 25 mV
LOAD
LOAD
LOAD
= +3.3V and C
DDA
= +25NC.) (Note 3)
A
= +3.3V and C
DDB
= 100mA 2.4 mV
= 30mA 60 dB
= 30mA 45 FV
VDD_
VDD_
= 20FF, C
= 20FF, C
REFBP
EFBP
R
= 0.1FF, C
1.50
1.80
2.70
1.70
= 0.1FF, C
2.65
2.70
2.75
2.80
2.85
2.90
2.95
3.00
OUT2
OUT3
MAX8982A/MAX8982X
= 1FF,
V
I
= 1FF,
RMS
V
I
13
Power-Management ICs for
ICERA E400/E450 Platform
OUT4 (LDO4) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982X: V
wise noted. Typical values are at T
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage I
Maximum Output Current 50 mA
Current Limit (Note 4) V
Load Regulation 50FA < I
Power-Supply Rejection
DV
/DV
OUT
IN
Output Noise Voltage 100Hz to 100kHz, I
Programmable Output Voltage I
Startup Time from Shutdown
(Note 4)
MAX8982A/MAX8982X
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
IN3
= V
= 1.8V, C
BUCK2
= +25NC.) (Note 3)
A
LOAD
OUT4
f = 10Hz to 10kHz, I
LOAD
I
LOAD
I
LOAD
2
I
C programmable, default off 100
= 2.2FF, C
IN3
REFBP
= 0.1FF, C
= 2.2FF, TA = -40NC to +85NC, unless other-
OUT4
= 10mA 0.873 0.9 0.927 V
= 90% of its regulation 55 120 220 mA
< 10mA 25 mV
LOAD
= 10mA 60 dB
LOAD
= 10mA 45 FV
LOAD
0.80
0.90
= 10mA
1.00
1.10
1.20
= 50mA 100 Fs
= 50mA 50 mV
RMS
V
I
OUT5 (LDO5) ELECTRICAL CHARACTERISTICS
(MAX8982A: V
T
= -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
A
= +3.2V and C
DDB
= 10FF, MAX8982X: V
VDD_
= +3.3V and C
DDB
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage I
= 50mA 2.91 3.00 3.09 V
LOAD
Maximum Output Current 150 mA
Current Limit (Note 4) V
Dropout Voltage (Note 4) I
Line Regulation 3.2V P V
Load Regulation 50FA < I
Power-Supply Rejection
DV
/DV
OUT
IN
Output Noise Voltage 100Hz to 100kHz, I
Programmable Output Voltage I
Startup Time from Shutdown
(Note 4)
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
= 90% of its regulation 165 360 650 mA
OUT5
= 100mA, T
LOAD
DDB
LOAD
f = 10Hz to 10kHz, I
= 50mA, V
LOAD
= 150mA 100 Fs
I
LOAD
I
= 150mA 50 mV
LOAD
2
I
C programmable, default off 100
= +85NC 150 300 mV
A
P 3.65V, I
< 150mA, V
LOAD
DDB
= 100mA 2.4 mV
LOAD
= 2.8V 25 mV
OUT
= 30mA 60 dB
LOAD
= 30mA 45 FV
= 3.4V for V
OUT
= 3.2V
VDD_
= 20FF, C
REFBP
= 0.1FF, C
2.80
2.90
3.00
3.20
OUT5
= 1FF,
RMS
V
I
14
Power-Management ICs for
ICERA E400/E450 Platform
OUT6 (LDO6) ELECTRICAL CHARACTERISTICS
(MAX8982A: V
T
= -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
A
= +3.2V and C
DDB
= 10FF, MAX8982X: V
VDD_
= +3.3V and C
DDB
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage I
= 50mA 2.619 2.70 2.781 V
LOAD
Maximum Output Current 150 mA
Current Limit (Note 4) V
Dropout Voltage (Note 4) I
Line Regulation 2.90V P V
Load Regulation 50FA < I
Power-Supply Rejection
DV
/DV
OUT
IN
Output Noise Voltage 100Hz to 100kHz, I
Programmable Output Voltage I
Startup Time from Shutdown
(Note 4)
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
= 90% of its regulation 165 360 650 mA
OUT6
= 100mA, T
LOAD
DDB
LOAD
f = 10Hz to 10kHz, I
= 50mA
LOAD
= 150mA 100 Fs
I
LOAD
I
= 150mA 50 mV
LOAD
2
I
C programmable, default off 100
= +85NC 150 300 mV
A
P 3.65V, I
= 100mA 2.2 mV
LOAD
< 150mA 25 mV
= 30mA 60 dB
LOAD
= 30mA 45 FV
LOAD
VDD_
= 20FF, C
REFBP
= 0.1FF, C
2.65
2.70
2.75
2.80
2.85
2.90
2.95
3.00
O
UT6
= 1FF,
MAX8982A/MAX8982X
RMS
V
I
VSIM (LDO7) ELECTRICAL CHARACTERISTICS
(MAX8982A: V
T
= -40NC to +85NC, unless otherwise noted. Typical values are at TA = +25NC.) (Note 3)
A
PARAMETER CONDITION MIN TYP MAX UNITS
Output Voltage
Maximum Output Current 2.9V P V
Current Limit (Note 4) V
Dropout Voltage (Note 4) I
Line Regulation 2.9V P V
Load Regulation 50FA < I
Power-Supply Rejection f = 10kHz, I
Output Noise Voltage 100Hz to 100kHz, I
VSIM Discharge Resistance
(Active Discharge Resistance)
= +3.2V and C
DDB
= 10FF, MAX8982X: V
VDD_
50FA < I
50FA < I
= 90% of 1.8V mode 165 360 650 mA
VSIM
= 20mA, 3V mode 120 200 mV
LOAD
2
I
C programmable, default off 100
< 20mA, 1.8V mode 1.746 1.80 1.854
LOAD
< 20mA, 3.0V mode (default) 2.91 3.00 3.09
LOAD
P 3.65V, 1.8V mode 150 mA
DDB
P 3.65V, I
DDB
< 20mA (1.8V mode) 25 mV
LOAD
LOAD
LOAD
= 10mA 57 dB
LOAD
= +3.3V and C
DDB
= 50FA (1.8V mode) 0.1 mV
= 10mA 80 FV
VDD_
= 20FF, C
REFBP
= 0.1FF, C
O
= 1FF,
UT
V
I
15
Power-Management ICs for
ICERA E400/E450 Platform
OUT8 (LDO8) ELECTRICAL CHARACTERISTICS
(MAX8982A only, V
Typical values are at T
PARAMETER CONDITION MIN TYP MAX UNITS
Input Operating Range Guaranteed by output voltage accuracy 3.0 5.5 V
Overvoltage Lockout
(Shutdown LDO8 Output)
Overvoltage Hysteresis 250 mV
Default Output Voltage I
Maximum Output Current 150 mA
Current Limit (Note 4) V
Dropout Voltage (Note 4) 100mA, T
Line Regulation 3.4V P V
Load Regulation 50FA < I
Power-Supply Rejection
DV
/DV
OUT
IN
Output Noise Voltage (RMS) 100Hz to 100kHz, I
MAX8982A/MAX8982X
Programmable Output Voltage I
Startup Time from Shutdown
(Note 4)
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
IN4
= V
= +5.0V, C
IN1_
= +25NC.) (Note 3)
A
= 1.0FF, C
IN4
V
rising, V
IN4
= 50mA 2.91 3.00 3.09 V
LOAD
= 90% of its regulation 165 360 650 mA
OUT8
A
IN4
LOAD
= V
IN1_
= +85NC 150 300 mV
P 5.5V, V
< 150mA 25 mV
f = 10Hz to 10kHz, I
= 0.1FF, C
REFBP
IN4
= 3.1V, I
OUT8
= 30mA 60 dB
LOAD
= 30mA 45 FV
LOAD
= 1FF, TA = -40NC to +85NC, unless otherwise noted.
OUT8
5.75 5.93 V
= 100mA 2.2 mV
LOAD
3.00
LOAD
= 50mA
3.10
3.20
3.30
= 150mA 100 Fs
I
LOAD
I
= 150mA 50 mV
LOAD
2
I
C programmable, default off 100
RMS
V
I
OUT9 (LDO9) ELECTRICAL CHARACTERISTICS
(MAX8982A/MAX8982X: V
wise noted. Typical values are at T
PARAMETER CONDITION MIN TYP MAX UNITS
Default Output Voltage ±I
Maximum Output Current 50 mA
Current Limit (Note 4) V
Load Regulation 50FA < I
Power-Supply Rejection
/DV
DV
OUT
IN
Output Noise Voltage 100Hz to 100kHz, I
Programmable Output Voltage I
Startup Time from Shutdown
(Note 4)
16
IN3
= V
= 1.8V, C
BUCK2
= +25NC.) (Note 3)
A
LOAD
OUT9
f = 10Hz to 10kHz, I
LOAD
I
LOAD
IN3
= 10mA, V
= 2.2FF, C
1.8V 0.873 0.900 0.927 V
IN3
=
REFBP
= 0.1FF, C
= 2.2FF, TA = -40NC to +85NC, unless other-
OUT9
= 90% of its regulation 55 120 220 mA
< 50mA 25 mV
LOAD
= 10mA 60 dB
LOAD
= 10mA 45 FV
LOAD
0.80
0.90
= 10mA
1.00
1.10
1.20
= 50mA 100 Fs
RMS
V
Power-Management ICs for
ICERA E400/E450 Platform
OUT9 (LDO9) ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A/MAX8982X: V
wise noted. Typical values are at T
PARAMETER CONDITION MIN TYP MAX UNITS
Startup Transient Overshoot
(Note 4)
Shutdown Output Impedance
(Active Discharge Resistance)
RESET ELECTRICAL CHARACTERISTICS
(MAX8982A: V
-40NC to +85NC, unless otherwise noted. Typical values are at T
PARAMETER CONDITION MIN TYP MAX UNITS
Output High Voltage Internal logic supply I
Output Low Voltage Internal logic supply I
RESET Enabled (Note 4) From BUCK2 enable (Figure 4) 625 Fs
RESET Disabled (Note 4) With respect to IRQ = low 26 78 Fs
Pullup Resistance to BUCK2 8 14 22 kI
IN1A
= V
= V
IN3
BUCK2
= +25NC.) (Note 3)
A
I
LOAD
2
C programmable, default off 100
I
= +5V, MAX8982X: V
IN1B
= 1.8V, C
= 50mA 50 mV
= 2.2FF, C
IN3
= V
IN1A
= 0.1FF, C
REFBP
= +3.3V, V
IN1B
= +25NC.) (Note 3)
A
SOURCE
SINK
= 0FA
= 500FA 0.3 V
BUCK2
= 2.2FF, TA = -40NC to +85NC, unless other-
OUT9
= 1.8V, C
BUCK2
V
BUCK2
- 0.3V
= 2.2FF, C
REFBP
= 0.1FF, TA =
MAX8982A/MAX8982X
I
V
IRQ ELECTRICAL CHARACTERISTICS
(MAX8982A: V
T
= -40NC to +85NC. Typical values are at T
A
PARAMETER CONDITION MIN TYP MAX UNITS
Output High Voltage Internal logic supply I
Output Low Voltage Internal logic supply I
Pullup Resistance to BUCK2 100 200 400 kI
IN1A
= V
= +5.0V, MAX8982X: V
IN1B
= V
IN1A
= +25NC, unless otherwise specified.) (Note 3)
A
SOURCE
SINK
= +3.3V, V
IN1B
= 0FA
= 500FA 0.3 V
BUCK2
= 1.8V, C
BUCK2
V
BUCK2
- 0.3V
= 2.2FF, C
REFBP
= 0.1FF,
CURRENT REGULATOR ELECTRICAL CHARACTERISTICS
(MAX8982A: V
T
= -40NC to +85NC, unless otherwise noted. Typical values are at T
A
PARAMETER CONDITION MIN TYP MAX UNITS
DR_ Sink Current Range 3 24 mA
DR_ Current Sink Programmable
DR_ Sink Current Accuracy
(Note 4)
Voltage Drop I
V
DR_
IN1A
= V
= +5V and V
IN1B
= 3.2V, MAX8982X: V
DD_
DR_[2:0] = 000 3
DR_[2:0] = 001 6
DR_[2:0] = 010 9
DR_[2:0] = 011 12
DR_[2:0] = 100 15
DR_[2:0] = 101 18
DR_[2:0] = 110 21
DR_[2:0] = 111 (default) 24
= +25NC -10 +10
T
A
= -40NC to +85NC -15 +15
T
A
= 24mA 60 120 mV
DR_
= V
IN1A
= +25NC.) (Note 3)
A
= +3.3V and V
IN1B
= 3.3V, C
DD_
REFBP
= 0.1FF,
V
mA
%
17
Power-Management ICs for
ICERA E400/E450 Platform
FLASH TIMER ELECTRICAL CHARACTERISTICS
(MAX8982A: V
= -40NC to +85NC, unless otherwise noted. Typical values are at T
T
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
Flash Timer Resolution 25 ms
Pattern Period, t
= V
IN1A
7-bit programmable in 25ms steps
P
= +5V and V
IN1B
= +3.2V, MAX8982X: V
DD_
= V
IN1A
= +25NC.) (Note 4, Figure 11)
A
= +3.3V and V
IN1B
= +3.3V, C
DD_
0 3175
0 (0000000)
25 (0000001)
50
75
.
.
3175 (1111111)
REFBP
= 0.1FF,
ms
Number of Programmable On
Threshold
MAX8982A/MAX8982X
Time for Flash to Turn On, t
Time for Flash to Turn On, t
Time for Flash to Turn On, t
Time for Flash to Turn On, t
7-bit programmable in 25ms steps
1
7-bit programmable in 25ms steps
2
7-bit programmable in 25ms steps
3
7-bit programmable in 25ms steps
4
4
0 3175
0 (0000000)
25 (0000001)
50
.
.
3175 (1111111)
0 3175
0 (0000000)
25 (0000001)
50
.
.
3175 (1111111)
0 3175
0 (0000000)
25 (0000001)
50
.
.
3175 (1111111)
0 3175
0 (0000000)
25 (0000001)
50
.
.
3175 (1111111)
ms
ms
ms
ms
18
Power-Management ICs for
ICERA E400/E450 Platform
FLASH TIMER ELECTRICAL CHARACTERISTICS (continued)
(MAX8982A: V
= -40NC to +85NC, unless otherwise noted. Typical values are at T
T
A
PARAMETER CONDITIONS MIN TYP MAX UNITS
Programmable On-Time, t
N32KHZ ELECTRICAL CHARACTERISTICS
(MAX8982A: V
unless otherwise noted. Typical values are at T
PARAMETER CONDITION MIN TYP MAX UNITS
Output High Voltage Internal logic supply I
Output Low Voltage Internal logic supply I
Output Duty Cycle 30 50 70 %
Output Frequency Range Including initial startup, 20% tolerance 25.6 32 38.4 kHz
Startup Time From BUCK2 enable (Figure 4) 225 Fs
Edge Jitter (Note 4) 10 ns
Note 3: Limits are 100% production tested at T
teed by design.
Note 4: Guaranteed by design, not production tested.
= V
IN1A
= +3.2V, MAX8982X: V
DD_
= +5V and V
IN1B
ON
= +3.2V, MAX8982X: V
DD_
= V
IN1A
= +25NC.) (Note 4, Figure 11)
A
= +3.3V and V
IN1B
4-bit programmable in 25ms steps, same for each flash
timer
= +3.3V, V
DD_
= +25NC.) (Note 3)
A
= +25NC, unless otherwise noted. Limits over the temperature range are guaran-
A
= 1.8V, C
BUCK2
SOURCE
SINK
= 2mA
= 2mA 0.45 V
BUCK2
= 2.2FF, C
= +3.3V, C
DD_
25 400
25 (0000)
50 (0001)
75
.
.
400 (1111)
= 0.1FF, T
REFBP
BUCK2
V
- 0.45V
= 0.1FF,
REFBP
= -40NC to +85NC,
A
MAX8982A/MAX8982X
ms
V
Typical Operating Characteristics
(MAX8982A: V
Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at T
unless otherwise noted. Limits over the temperature range are guaranteed by design.
4.0
3.5
3.0
2.5
2.0
1.5
SHUTDOWN CURRENT (µA)
1.0
0.5
0
4.0 5.5
IN1A
= V
= 5V, MAX8982X: V
IN1B
SHUTDOWN CURRENT
vs. INPUT VOLTAGE (MAX8982A)
5.04.5
INPUT VOLTAGE (V)
= V
IN1A
4.0
3.5
MAX8982A toc01
3.0
2.5
2.0
1.5
SHUTDOWN CURRENT (µA)
1.0
0.5
0
3.0 5.5
IN1B
= V
DDA
= V
= V
DDB
= +25°C. Limits are 100% production tested at T
A
SHUTDOWN CURRENT
vs. INPUT VOLTAGE (MAX8982X)
5.04.53.5 4.0
INPUT VOLTAGE (V)
= 3.3V, C
IN4
)
REFBP
300
280
260
MAX8982A toc02
240
220
200
180
160
SHUTDOWN CURRENT (µA)
140
120
100
4.0 5.5
= 0.1µF, TA = -40°C to +85°C,
= +25NC,
A
NO LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX8982A)
BUCK3, OUT3 ON
ALL OTHER OUTPUTS OFF
5.04.5
INPUT VOLTAGE (V)
19
MAX8982A toc03
Power-Management ICs for
ICERA E400/E450 Platform
Typical Operating Characteristics (continued)
(MAX8982A: V
Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at T
unless otherwise noted. Limits over the temperature range are guaranteed by design.
300
280
260
240
220
200
180
160
SHUTDOWN CURRENT (uA)
140
120
100
MAX8982A/MAX8982X
V
BUCK1
IN1A
= V
= 5V, MAX8982X: V
IN1B
NO LOAD SUPPLY CURRENT
vs. INPUT VOLTAGE (MAX8982X)
OUT3 ON
ALL OTHER OUTPUTS OFF
4.54.03.53.0 5.5
INPUT VOLTAGE (V)
BUCK1 LOAD TRANSIENT
5.0
MAX8982A toc06
= V
IN1A
MAX8982A toc04
AC-COUPLED
200mV/div
IN1B
= V
DDA
= V
= V
DDB
= +25°C. Limits are 100% production tested at T
A
= 3.3V, C
IN4
= 0.1µF, TA = -40°C to +85°C,
REFBP
)
BUCK1 LOAD REGULATION
0.950
L = 2.2µH, HITACHI METALS LTD
KSLI-252012AG-2R2
0.925
DCR = 100m
0.900
0.875
0.850
OUTPUT VOLTAGE (V)
0.825
0.800
0 1200
I
700200
LOAD CURRENT (mA)
BUCK1 EFFICIENCY
vs. LOAD CURRENT
100
V
= 4.5V
90
80
V
= 4.1V
IN
IN
A
MAX8982A toc05
MAX8982A toc07
= +25NC,
V
= 1V
I
BUCK1
OUT
C
OUT
= 10µF
100µs/div
BUCK1 SWITCHING FREQUENCY
vs. LOAD CURRENT
2.5
2.0
1.5
1.0
SWITCHING FREQUENCY (MHz)
0.5
0
0 1200
LOAD CURRENT (mA)
70
1.2A
1mA
60
EFFICIENCY (%)
50
40
30
1 1000
V
= 5V
IN
V
= 5.5V
IN
LOAD CURRENT (mA)
10010
V
= 0.9V
OUT
BUCK1 SWITCHING FREQUENCY
vs. TEMPERATURE
2.200
2.150
MAX8982A toc08
700200
2.100
2.050
2.000
1.950
1.900
1.850
SWITCHING FREQUENCY (MHz)
1.800
1.750
-40 85
TEMPERATURE (°C)
603510-15
MAX8982A toc09
20
Power-Management ICs for
ICERA E400/E450 Platform
Typical Operating Characteristics (continued)
(MAX8982A: V
Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at T
unless otherwise noted. Limits over the temperature range are guaranteed by design.
IN1A
= V
= 5V, MAX8982X: V
IN1B
IN1A
= V
IN1B
= V
DDA
= V
= V
DDB
= +25°C. Limits are 100% production tested at T
A
= 3.3V, C
IN4
= 0.1µF, TA = -40°C to +85°C,
REFBP
)
= +25NC,
A
MAX8982A/MAX8982X
BUCK1 RAMP-UP TRANSITION
V
BUCK1
NO LOAD
12.5mV/µs RAMP RATE
20µs/div
BUCK2 LOAD REGULATION
1.820
1.800
1.780
1.760
OUTPUT VOLTAGE (V)
1.740
L = 1.0µH, MURATA LQM2MPN1R0NG0
I
DCR = 85m
1.720
0 600
LOAD CURRENT (mA)
MAX8982A toc10
1.2V
0.6V
MAX8982A toc12
400200
V
BUCK1
V
BUCK2
I
BUCK2
BUCK1 RAMP-DOWN TRANSITION
I
= 1.2A
OUT
12.5mV/µs RAMP RATE
20µs/div
BUCK2 LOAD TRANSIENT
V
= 1.8V
OUT
40µs/div
MAX8982A toc11
MAX8982A toc13
1.2V
0.6V
AC-COUPLED
100mV/div
600mA
1mA
100
90
80
70
EFFICIENCY (%)
60
50
40
BUCK2 EFFICIENCY
vs. LOAD CURRENT
V
IN
V
= 4.1V
IN
V
= 5.5V
IN
100101 1000
LOAD CURRENT (mA)
= 4.5V
V
IN
= 5V
MAX8982A toc14
BUCK3 LOAD REGULATION
(MAX8982A ONLY)
3.300
L = 2.2µH, HITACHI METALS LTD
KSLI-252012AG-2R2
3.250
3.200
3.150
3.100
OUTPUT VOLTAGE (V)
3.050
3.000
0 600
DCR = 100m
I
LOAD CURRENT (mA)
MAX8982A toc15
500400300200100
21
Power-Management ICs for
ICERA E400/E450 Platform
Typical Operating Characteristics (continued)
(MAX8982A: V
Circuits of Figures 2 and 3, unless otherwise noted. Typical values are at T
unless otherwise noted. Limits over the temperature range are guaranteed by design.
V
BUCK3
I
BUCK3
MAX8982A/MAX8982X
3.410
3.400
3.390
3.380
3.370
3.360
OUTPUT VOLTAGE (V)
3.350
3.340
3.330
IN1A
= V
= 5V, MAX8982X: V
IN1B
BUCK3 LOAD TRANSIENT
(MAX8982A ONLY)
20µs/div
V
OUT
C
OUT
MAX8982A toc16
= 3.2V
= 10µF
BUCK4 LOAD REGULATION
(MAX8982A ONLY)
L = TAIYO YUDEN NR3015T1R0N
I
DCR = 30m
0 600
LOAD CURRENT (mA)
500400100 200 300
= V
IN1A
AC-COUPLED
100mV/div
600mA
1mA
MAX8982A toc18
IN1B
= V
DDA
= V
= V
DDB
= +25°C. Limits are 100% production tested at T
A
= 3.3V, C
IN4
= 0.1µF, TA = -40°C to +85°C,
REFBP
)
BUCK3 EFFICIENCY
vs. LOAD CURRENT (MAX8982A ONLY)
100
EFFICIENCY (%)
V
= 4.1V
95
90
85
80
75
70
65
60
55
50
IN
V
= 5.5V
IN
1 1000
LOAD CURRENT (mA)
BUCK4 LOAD TRANSIENT (MAX8982A ONLY)
V
BUCK4
I
BUCK4
V
= 3.4V
OUT
1mA TO 1.5A
20µs/div
V
= 4.5V
IN
V
= 5V
IN
V
= 3.2V
OUT
10010
MAX8982A toc19
A
MAX8982A toc17
AC-COUPLED
50mV/div
1.5A
1mA
= +25NC,
22
BUCK4 EFFICIENCY vs. LOAD CURRENT
(MAX8982A ONLY)
100
90
80
70
60
50
EFFICIENCY (%)
40
30
20
10
1 10,000
LOAD CURRENT (mA)
VIN = 4.1V
VIN = 4.5V
VIN = 5V
VIN = 5.5V
BUCK4 SWITCHING FREQUENCY
vs. LOAD CURRENT (MAX8982A ONLY)
2.5
MAX8982A toc20
V
= 3.4V
OUT
100010010
2.0
1.5
1.0
SWITCHING FREQUENCY (MHz)
0.5
0
0 600
LOAD CURRENT (mA)
400200
MAX8982A toc21
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