Linear Analog Devices LTM4673 Manuals

Manuals and User Guides for Linear Analog Devices LTM4673. We have 1 Linear Analog Devices LTM4673 manual available for free PDF download: User Manual

Linear Analog Devices LTM4673 User Manual (122 pages)

Quad Output μModule Regulator with Digital Power System Management

Brand: Linear | Category: Computer Hardware | Size: 3.8 MB

Features
1
Applications
1
Typical Application
1
Description
1
Table of Contents
2
Absolute Maximum Ratings
4
Pin Configuration
5
Order Information
5
Electrical Characteristics
6
Pmbus Timing Diagram
12
Typical Performance Characteristics
13
Pin Functions
17
Pins for Dual 12A Channels
17
Pins for Dual 5A Channels
19
Pins for Digital Power System Management
20
Block Diagram
21
Decoupling Requirements
22
Operation
22
Eeprom
24
Auxfault
24
Reset
25
Pmbus Serial Digital Interface
25
Pmbus
25
Device Address
25
Processing Commands
26
Pmbus Command Summary
29
Applications Information
36
Overview
36
Powering LTM4673
36
Vin out
36
Input Decoupling Capacitors
36
OUT Step-Down Ratios
36
Output Voltage Programming and Trimming
37
Output Decoupling Capacitors
37
Forced Continuous Current Mode (CCM)
37
Discontinuous Mode/Burst Mode Operation
37
Operating Frequency
38
Frequency Synchronization and Clock in
38
Soft-Start
39
Power Good
39
Stability Compensation
39
Setting Command Register Values
39
Measuring Input Current
39
Measuring Input Voltage
40
Measuring Input Power
40
Measuring INPUT ENERGY
41
Sequence, Servo, Margin and Restart Operations
41
Command Units on or off
41
On Sequencing
41
On State Operation
42
Servo Modes
42
DAC Modes
42
Margining
42
Off Sequencing
43
VOUT off Threshold Voltage
43
Automatic Restart Via MFR_RESTART_DELAY and
43
CONTROL Pin
43
Fault Management
43
Output Overvoltage, Undervoltage, Overcurrent and Undercurrent Faults
43
Output Overvoltage, Undervoltage, and Overcurrent Warnings
43
Configuring the AUXFAULT Output
44
Multichannel Parallel Operation
44
Input RMS Ripple Current Cancellation
44
Cascade Sequence on with Time-Based Sequence off
44
Output Voltage Tracking
45
Multi-Channel Fault Management
49
Interconnect between Multiple Analog Devices POWER MANAGERS
50
Controller to the LTM4673 in System
50
Ltpowerplay: an Interactive GUI for Power Managers
53
Four-Step Resistor Selection Procedure for Resistors
53
Between VDAC
53
Thermal Considerations and Output Current Derating
55
Safety Considerations
61
Layout Checklist/Example
61
Typical Applications
63
Pmbus Command Description
67
Addressing and Write Protect
67
Write_Protect
68
WRITE-PROTECT Pin
68
Mfr_Page_Ff_Mask
68
Mfr_I2C_Base_Address
69
Mfr_Command_Plus
69
MFR_DATA_PLUS0 and MFR_DATA_PLUS1
69
MFR_STATUS_PLUS0, and MFR_STATUS_PLUS1
69
Plus0
70
Data_Plus0
71
Peek Operation Using Mfr_Data_Plus0
71
Enabling and Disabling Poke Operations
71
Poke Operation Using Mfr_Data_Plus0
71
Command Plus Operations Using Mfr_Data_Plus1
72
On/Off Control, Margining and Configuration
72
Operation
72
On_Off_Config
73
Mfr_Config_Ltm4673
74
Mfr_Config2_Ltm4673
75
Mfr_Config3_Ltm4673
76
Mfr_Config_All_Ltm4673
77
Programming User EEPROM Space
78
STORE_USER_ALL and RESTORE_USER_ALL
79
Bulk Programming the User EEPROM Space
79
Mfr_Ee_Unlock
79
Mfr_Ee_Erase
80
Mfr_Ee_Data
80
Response When Part Is Busy
81
MFR_EE Erase and Write Programming Time
81
Input Voltage Commands and Limits
81
LIMIT, VIN_UV_WARN_LIMIT and
81
Vin_Uv_Fault_Limit
81
INPUT Current and ENERGY
82
Energy Measurement and Reporting
82
Mfr_Ein
83
Mfr_Ein_Config
83
Mfr_Iin_Cal_Gain
84
Mfr_Iin_Cal_Gain_Tc
84
Output Voltage Commands and Limits
85
Vout_Mode
86
Vout_Command, Vout_Max, Vout_Margin_High
86
LIMIT, POWER_GOOD_ON and POWER_GOOD_OFF
86
Mfr_Vout_Discharge_Threshold
86
Mfr_Dac
86
Output Current Commands and Limits
87
Iout_Cal_Gain
87
Iout_Uc_Fault_Limit
88
Mfr_Iout_Cal_Gain_Tc
88
External Temperature Commands and Limits
88
OT_FAULT_LIMIT, OT_WARN_LIMIT, UT_WARN_LIMIT and
89
Ut_Fault_Limit
89
MFR_TEMP_1_GAIN and MFR_TEMP_1_OFFSET
89
MFR_T_SELF_HEAT, MFR_IOUT_CAL_GAIN_TAU_INV and
89
Mfr_Iout_Cal_Gain_Theta
90
Sequencing Timing Limits and Clock Sharing
91
TON_DELAY, TON_RISE, TON_MAX_FAULT_LIMIT and
91
Toff_Delay
91
Mfr_Restart_Delay
92
Clock Sharing
92
Watchdog Timer and Power Good
92
Mfr_Pwrgd_En
92
Mfr_Powergood_Assertion_Delay
93
Watchdog Operation
93
MFR_WATCHDOG_T_FIRST and MFR_WATCHDOG_T
93
Fault Responses
94
Clearing Latched Faults
94
VOUT_OV_FAULT_RESPONSE and VOUT_UV_FAULT
95
Response
95
IOUT_OC_FAULT_RESPONSE and IOUT_UC_FAULT
95
Ot_Fault_Response, Ut_Fault_Response, Vin_Ov
96
FAULT_RESPONSE and VIN_UV_FAULT_RESPONSE
96
Ton_Max_Fault_Response
97
Mfr_Retry_Delay
97
Mfr_Retry_Count
97
Shared External Faults
98
MFR_FAULTB0_PROPAGATE and MFR_FAULTB1
98
Propagate
98
MFR_FAULTB0_RESPONSE and MFR_FAULTB1
99
Response
99
Fault Warning and Status
99
Clear_Faults
99
Status_Byte
100
Status_Word
100
Status_Vout
101
Status_Iout
101
Status_Input
101
Status_Temperature
102
Status_Cml
102
Status_Mfr_Specific
103
Mfr_Pads
103
Mfr_Common
104
Telemetry
105
Read_Vin
105
Read_Iin
105
Read_Pin
105
Read_Vout
105
Read_Iout
106
Mfr_Iin_Peak
106
Mfr_Iin_Min
106
Mfr_Pin_Peak
106
Mfr_Pin_Min
106
Read_Temperature_1
106
Read_Temperature_2
106
Read_Pout
106
Mfr_Read_Iout
107
Mfr_Iout_Sense_Voltage
108
Mfr_Vin_Peak
108
Mfr_Vout_Peak
108
Mfr_Iout_Peak
108
Mfr_Temperature_1_Peak
108
Mfr_Vin_Min
108
Mfr_Vout_Min
108
Mfr_Iout_Min
108
Mfr_Temperature_1_Min
109
Fault Logging
109
Fault Log Operation
109
Mfr_Fault_Log_Store
109
Mfr_Fault_Log_Restore
109
Mfr_Fault_Log_Clear
110
Mfr_Fault_Log_Status
110
Mfr_Fault_Log
110
MFR_FAULT_LOG Read Example
113
Identification/Information
117
Capability
118
Pmbus_Revision
118
Mfr_Special_Id
118
Mfr_Special_Lot
118
User Scratchpad
118
User_Data_00, User_Data_01, User_Data_02
118
User_Data_03, User_Data_04, Mfr_Ltc
118
RESERVED_1 and MFR_LTC_RESERVED_2
118
Package Description
119
Package Photos
122
Design Resources
122
Related Parts
122

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