LTM2987 datasheet(2/114 Pages) AD

2 / 114 page

LTC2971

Rev. 0

For more information www.analog.com

TABLE OF CONTENTS

Features............................................................................1

Applications .......................................................................1

Typical Application ...............................................................1

Description.........................................................................1

Absolute Maximum Ratings.....................................................4

Pin Configuration .................................................................4

Order Information.................................................................5

Electrical Characteristics........................................................5

PMBus Timing Diagram........................................................ 13

Typical Performance Characteristics ........................................ 14

Pin Functions .................................................................... 18

Block Diagram................................................................... 20

Operation......................................................................... 21

LTC2971 Operation Overview............................................................ 21

EEPROM....................................................................................... 22

AUXFAULTB ....................................................................................... 22

RESETB.............................................................................................. 22

VDDIO.....................................................................................................................23

PMBus Serial Digital Interface .......................................................... 23

PMBus.......................................................................................... 23

Device Address ............................................................................ 23

Processing Commands................................................................ 24

Addressing and Write Protect ........................................................... 33

PAGE ............................................................................................ 33

WRITE_PROTECT ........................................................................ 34

WRITE PROTECT Pin ................................................................... 34

MFR_PAGE_FF_MASK................................................................. 35

MFR_I2C_BASE_ADDRESS ........................................................ 35

MFR_COMMAND_PLUS.............................................................. 35

MFR_DATA_PLUS0 and MFR_DATA_PLUS1.............................. 35

MFR_STATUS_PLUS0, and MFR_STATUS_PLUS1 .................... 35

Reading Fault Log Using Command Plus and MFR_DATA_PLUS0.

Reading Energy Using MFR_COMMAND_PLUS and MFR_DATA_

PLUS0 .......................................................................................... 37

Peek Operation Using MFR_DATA_PLUS0.................................. 37

Enabling and Disabling Poke Operations..................................... 37

Poke Operation Using Mfr_data_plus0 ....................................... 38

Command Plus Operations Using MFR_DATA_PLUS1 ............... 38

On/Off Control, Margining and Configuration................................... 38

OPERATION.................................................................................. 39

ON_OFF_CONFIG ......................................................................... 40

MFR_CONFIG_LTC2971 .............................................................. 40

Cascade Sequence ON with Time-Based Sequence OFF............. 42

MFR_CONFIG2_LTC2971 ............................................................ 43

MFR_CONFIG3_LTC2971 ............................................................ 43

Tracking Supplies On and Off ...................................................... 44

Tracking Implementation ............................................................. 44

MFR_CONFIG_ALL_LTC2971...................................................... 46

Programming User EEPROM Space.................................................. 48

STORE_USER_ALL and RESTORE_USER_ALL.......................... 48

MFR_EE_UNLOCK ....................................................................... 49

MFR_EE_ERASE.......................................................................... 49

MFR_EE_DATA............................................................................. 49

Response When Part Is Busy....................................................... 50

MFR_EE Erase and Write Programming Time............................. 50

VIN_ON, VIN_OFF, VIN_OV_FAULT_LIMIT, VIN_OV_WARN_

LIMIT, VIN_UV_WARN_LIMIT and

VIN_UV_FAULT_LIMIT................................................................. 50

Input Voltage Commands and Limits ................................................ 50

Input Current and Energy ...................................................................51

Energy Measurement and Reporting............................................51

MFR_EIN ......................................................................................51

MFR_EIN_CONFIG ....................................................................... 52

MFR_IIN_CAL_GAIN ................................................................... 53

MFR_IIN_CAL_GAIN_TC ............................................................. 53

MFR_CLEAR_ENERGY ................................................................ 53

Output Voltage Commands and Limits.............................................. 54

VOUT_MODE................................................................................ 55

VOUT_COMMAND, VOUT_MAX, VOUT_MARGIN_HIGH, VOUT_

MARGIN_LOW, VOUT_OV_FAULT_LIMIT,

VOUT_OV_WARN_LIMIT, VOUT_UV_WARN_LIMIT, VOUT_UV_

FAULT_LIMIT, POWER_GOOD_ON and

POWER_GOOD_OFF .................................................................... 55

MFR_VOUT_DISCHARGE_THRESHOLD...................................... 55

MFR_DAC_STARTUP................................................................... 55

MFR_DAC..................................................................................... 56

Output Current Commands and Limits.............................................. 56

IOUT_CAL_GAIN and IOUT_CAL_OFFSET .................................. 56

IOUT_OC_WARN_LIMIT .............................................................. 57

MFR_IOUT_CAL_GAIN_TC.......................................................... 57

External Temperature Commands and Limits................................... 57

OT_FAULT_LIMIT, OT_WARN_LIMIT, UT_WARN_LIMIT and

UT_FAULT_LIMIT......................................................................... 58

MFR_TEMP_1_GAIN and MFR_TEMP_1_OFFSET ....................... 58

MFR_T_SELF_HEAT, MFR_IOUT_CAL_GAIN_TAU_INV and MFR_

IOUT_CAL_GAIN_THETA ............................................................. 58

Sequencing Timing Limits and Clock Sharing................................... 60

TON_DELAY, TON_RISE, TON_MAX_FAULT_LIMIT and TOFF_

DELAY .......................................................................................... 60

MFR_RESTART_DELAY............................................................... 61

Clock Sharing............................................................................... 61

Watchdog Timer and Power Good..................................................... 61

MFR_PG_CONFIG........................................................................ 62

MFR_PG_GPO ............................................................................. 64

MFR_PWRGD_EN........................................................................ 64

MFR_POWERGOOD_ASSERTION_DELAY.................................. 64

Watchdog Operation .................................................................... 65

MFR_WATCHDOG_T_FIRST and MFR_WATCHDOG_T ............... 65

Fault Responses ................................................................................ 65

Clearing Latched Faults ............................................................... 66

VOUT_OV_FAULT_RESPONSE and VOUT_UV_FAULT_RESPONSE

OT_FAULT_RESPONSE, UT_FAULT_RESPONSE, VIN_OV_FAULT_

RESPONSE and VIN_UV_FAULT_RESPONSE.............................. 67

TON_MAX_FAULT_RESPONSE ................................................... 67

MFR_RETRY_DELAY ................................................................... 68

MR_RETRY_COUNT .................................................................... 68

Shared External Faults....................................................................... 69

MFR_FAULTB0_PROPAGATE and MFR_FAULTB1_PROPAGATE 69

MFR_FAULTB0_RESPONSE and MFR_FAULTB1_RESPONSE ... 69

Fault Warning and Status .................................................................. 70

LTM2987 Datasheet(PDF) 2 Page - Analog Devices

LTM2987 Datasheet(HTML) 2 Page - Analog Devices

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 ...More

Datasheet Download

Link URL