Linear Technology Analog Devices LTC3882-1 Manuals

Manuals and User Guides for Linear Technology Analog Devices LTC3882-1. We have 1 Linear Technology Analog Devices LTC3882-1 manual available for free PDF download: Datasheet

Linear Technology Analog Devices LTC3882-1 Datasheet (108 pages)

Dual Output PolyPhase Step-Down DC/DC Voltage Mode Controller with Digital Power System Management

Brand: Linear Technology | Category: Controller | Size: 0 MB

Features

1
Applications

1
Typical Application

1
Description

1
- Table of Contents
  2
Absolute Maximum Ratings

4
Order Information

4
Pin Configuration

4
Electrical Characteristics

5
Typical Performance Characteristics

9
Pin Functions

13
Block Diagram

15
Test Circuit

16
Timing Diagram

16
Operation

16
- Overview
  16
- Main Control Loop
  17
- Power-Up and Initialization
  19
- Soft-Start
  20
- Time-Based Output Sequencing
  20
- Output Ramping Control
  20
- Voltage-Based Output Sequencing
  20
- Minimum Output Disable Times
  21
- Output Short Cycle
  21
- Light Load Current Operation
  21
- Switching Frequency and Phase
  21
- Polyphase Load Sharing
  22
- Active Voltage Positioning
  22
- Input Supply Monitoring
  22
- Output Voltage Sensing and Monitoring
  22
- Output Current Sensing and Monitoring
  22
- External and Internal Temperature Sense
  23
- Resistor Configuration Pins
  23
- Internal EEPROM with CRC and ECC
  24
- Fault Detection
  24
- Input Supply Faults
  24
- Hardwired PWM Response to V
  24
- OUT Faults
  24
  - Power Good Indication (Master)
    25
  - Power Good Indication (Slave)
    25
- OUT Faults
  25
- Status Registers and ALERT Masking
  
  26
  - Fault Logging
    28
  - FAULT Pin I/O
    28
  - Factory Default Operation
    31
  - Serial Bus Addressing
    32
  - Serial Interface
    32
  - Serial Bus Timeout
    36
  - Serial Communication Errors
    36
Pmbus Command Summary

37
- Pmbus Commands
  37
- Data Formats
  37
Applications Information

42
- Efficiency Considerations
  42
- PWM Frequency and Inductor Selection
  42
- Power MOSFET Selection
  43
- MOSFET Driver Selection
  44
- Using PWM Protocols
  44
- Selection
  44
- Selection
  45
- Feedback Loop Compensation
  46
- Out
  47
- PCB Layout Considerations
  47
- Output Current Sensing
  48
- Output Voltage Sensing
  50
- Soft-Start and Stop
  51
- Time-Based Output Sequencing and Ramping
  51
- Voltage-Based Output Sequencing
  52
- Using Output Voltage Servo
  54
- Using AVP
  54
- PWM Frequency Synchronization
  55
- Polyphase Operation and Load Sharing
  56
- External Temperature Sense
  60
- Resistor Configuration Pins
  60
- Internal Regulator Outputs
  62
- IC Junction Temperature
  62
- Derating EEPROM Retention at Temperature
  63
- Configuring Open-Drain Pins
  63
- Pmbus Communication and Command Processing
  64
- Status and Fault Log Management
  65
- Ltpowerplay - an Interactive Digital Power GUI
  65
- Interfacing to the DC1613
  66
- Design Example
  66
Pmbus COMMAND DETAILS

69
- Addressing and Write Protect
  69
  - Page_Plus_Write
    69
  - Page_Plus_Read
    70
  - Write_Protect
    70
  - Mfr_Address
    71
  - Mfr_Rail_Address
    71
- General Device Configuration
  71
  - Pmbus_Revision
    71
  - Capability
    71
- On, off and Margin Control
  72
  - On_Off_Config
    72
  - Mfr_Config_All_Ltc3882-1
    72
  - Operation
    73
  - Mfr_Reset
    73
- PWM Configuration
  74
  - Frequency_Switch
    74
- Mfr_Pwm_Config_Ltc3882-1
  75
- Mfr_Chan_Config_Ltc3882-1
  76
- Mfr_Pwm_Mode_Ltc3882-1
  77
- Input Voltage and Limits
  78
  - Vin_On
    78
  - Vin_Off
    78
  - Vin_Ov_Fault_Limit
    78
  - Vin_Uv_Warn_Limit
    78
- Output Voltage and Limits
  79
  - Vout_Mode
    79
  - Vout_Command
    79
  - Mfr_Vout_Max
    79
  - Vout_Max
    80
  - Mfr_Vout_Avp
    80
  - Vout_Margin_High
    80
  - Vout_Margin_Low
    80
  - Vout_Ov_Fault_Limit
    80
  - Vout_Ov_Warn_Limit
    81
  - Vout_Uv_Warn_Limit
    81
  - Vout_Uv_Fault_Limit
    81
- Output Current and Limits
  82
  - Iout_Cal_Gain
    82
  - Mfr_Iout_Cal_Gain_Tc
    82
  - Iout_Oc_Fault_Limit
    82
  - Iout_Oc_Warn_Limit
    82
- Output Timing, Delays, and Ramping
  83
  - Mfr_Restart_Delay
    83
  - Ton_Delay
    83
  - Ton_Rise
    83
  - Ton_Max_Fault_Limit
    84
  - Vout_Transition_Rate
    84
  - Toff_Delay
    84
  - Toff_Fall
    84
  - Toff_Max_Warn_Limit
    84
- External Temperature and Limits
  85
  - Mfr_Temp_1_Gain
    85
  - Mfr_Temp_1_Offset
    85
  - Ot_Fault_Limit
    85
  - Ot_Warn_Limit
    85
- Status Reporting
  86
  - Status_Byte
    86
  - Ut_Fault_Limit
    86
  - Status_Word
    87
  - Status_Vout
    87
  - Status_Iout
    87
  - Status_Input
    88
  - Status_Temperature
    88
  - Status_Cml
    88
  - Status_Mfr_Specific
    89
  - Mfr_Pads_Ltc3882-1
    89
  - Mfr_Common
    90
    
    Mfr_Info
    90
    
    Clear_Faults
    90
  - Telemetry
    91
    
    Read_Vin
    91
    
    Mfr_Vin_Peak
    91
    
    Read_Vout
    91
    
    Mfr_Vout_Peak
    91
    
    Read_Iout
    92
    
    Mfr_Iout_Peak
    92
    
    Read_Pout
    92
    
    Read_Temperature_1
    92
    
    Mfr_Temperature_1_Peak
    92
    
    Read_Temperature_2
    92
    
    Mfr_Temperature_2_Peak
    93
    
    Read_Duty_Cycle
    93
    
    Read_Frequency
    93
    
    Mfr_Clear_Peaks
    93
  - Fault Response and Communication
    94
    
    Vin_Ov_Fault_Response
    94
    
    Vout_Ov_Fault_Response
    95
    
    Vout_Uv_Fault_Response
    95
    
    Iout_Oc_Fault_Response
    96
    
    Ot_Fault_Response
    97
    
    Ut_Fault_Response
    97
    
    Mfr_Ot_Fault_Response
    97
    
    Ton_Max_Fault_Response
    98
    
    Mfr_Retry_Delay
    98
    
    Smbalert_Mask
    98
    
    Mfr_Fault_Propagate_Ltc3882-1
    99
    
    Mfr_Fault_Response
    100
    
    Mfr_Fault_Log
    101
    
    Fault Log Operation
    101
    
    Mfr_Fault_Log_Clear
    101
  - EEPROM User Access
    102
    
    Store_User_All
    102
    
    Restore_User_All
    102
    
    Mfr_Compare_User_All
    102
    
    Mfr_Fault_Log_Store
    103
    
    Mfr_Ee_Xxxx
    103
    
    User_Data_0X
    103
  - Unit Identification
    103
    
    Mfr_Id
    103
    
    Mfr_Model
    103
    
    Mfr_Serial
    103
    
    Mfr_Special_Id
    103
Typical Applications

104
Package Description

106
Revision History

107
Typical Application

108
Related Parts

108

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Linear Technology Analog Devices LTC3882-1 Manuals

Linear Technology Analog Devices LTC3882-1 Datasheet (108 pages)

Table of Contents

Features

Applications

Typical Application

Description

Absolute Maximum Ratings

Order Information

Pin Configuration

Electrical Characteristics

Typical Performance Characteristics

Pin Functions

Block Diagram

Test Circuit

Timing Diagram

Operation

Status Registers and ALERT Masking

Pmbus Command Summary

Applications Information

Pmbus COMMAND DETAILS

Typical Applications

Package Description

Revision History

Typical Application

Related Parts

Related Products

Linear Technology Categories