参数资料
型号: LTC3880EUJ#PBF
厂商: Linear Technology
文件页数: 98/112页
文件大小: 0K
描述: IC REG CTRLR BUCK PWM CM 40-QFN
软件下载: LTpowerPlay™
标准包装: 61
系列: PolyPhase®
PWM 型: 电流模式
输出数: 2
频率 - 最大: 1MHz
电源电压: 4.5 V ~ 24 V
降压:
升压:
回扫:
反相:
倍增器:
除法器:
Cuk:
隔离:
工作温度: -40°C ~ 105°C
封装/外壳: 40-WFQFN 裸露焊盘
包装: 管件
LTC3880/LTC3880-1
PMBus COMMAND DETAILS
NVM MEMORY COMMANDS
Store/Restore
COMMAND NAME
STORE_USER_ALL
RESTORE_USER_ALL
MFR_COMPARE_USER_ALL
CMD
CODE
0x15
0x16
0xF0
DESCRIPTION
Store user operating memory to EEPROM.
Restore user operating memory from EEPROM.
Compares current command contents with NVM.
TYPE
Send Byte
Send Byte
Send Byte
PAGED FORMAT UNITS NVM
N
N
N
DEFAULT
VALUE
NA
NA
NA
STORE_USER_ALL
The STORE_USER_ALL command instructs the PMBus device to copy the non-volatile user contents of the Operating
Memory to the matching locations in the non-volatile User NVM memory.
Executing this command if the die temperature exceeds 85°C is not recommended and the data retention of 10 years
cannot be guaranteed. If the die temperature exceeds 130°C, the STORE_USER_ALL command is disabled. The com-
mand is re-enabled when the IC temperature drops below 125°C.
Communication with the LTC3880 and programming of the NVM can be initiated when VDD33 is available and VIN
is not applied. To enable the part in this state, using global address 0x5B write 0x2B followed by 0xC4. The part
can now be communicated with, and the project file updated. To write the updated project file to the NVM issue a
STORE_USER_ALL command. When VIN is applied, a MFR_RESET must be issued to allow the PWM to be enabled
and valid ADCs to be read.
This write-only command has no data bytes.
RESTORE_USER_ALL
The RESTORE_USER_ALL command instructs the PMBus device to copy the contents of the non-volatile User memory
to the matching locations in the Operating Memory. The values in the Operating Memory are overwritten by the value
retrieved from the User commands. When a RESTORE_USER_ALL command is issued, the RUN pins and SHARE_CLK
pin is asserted low until the restore is complete. The RUN pins and SHARE_CLK is then released. The RCONFIG resis-
tor dividers are not re-read, and the value stored in NVM is used with the exception of the ASEL pin. The ASEL value
read at power-up or when the part is reset is used to calculate the effective device address using the MSB from NVM
and the LSB based on the ASEL decode.
RESTORE_USER_ALL. RESTORE_USER_ALL commands are disabled if the die exceeds 130°C and are not re-enabled
until the die temperature drops below 125°C.
This write-only command has no data bytes.
MFR_COMPARE_USER_ALL
The MFR_COMPARE_USER_ALL command instructs the PMBus device to compare current command contents with
what is stored in non-volatile memory. If the compare operation detects differences, a CML bit 0 fault will be generated.
This write-only command has no data bytes.
3880fb
98
For more information www.linear.com/LTC3880
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