LTC2978_15 Datasheet, PDF (33/80 Pages) Linear Technology – Octal Digital Power Supply Manager with EEPROM

LTC2978
PMBus Command Description
VOUT_MODE
This command is read only and specifies the mode and exponent for all commands with a L16 data format. See Data
Formats table on page 28.
VOUT_MODE Data Contents
BIT(S) SYMBOL
OPERATION
b[7:5] Vout_mode_type
Reports linear mode. Hard wired to 000b.
b[4:0] Vout_mode_parameter Linear mode exponent. 5-bit two’s complement integer. Hardwired to 0x13 (–13 decimal).
Output Voltage Related Commands
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
These commands all use the same format and provide various servo, margining, and supervising limits for a channel’s
output voltage. When odd channels are configured to measure current, the OV_WARN_LIMIT, UV_WARN_LIMIT,
OV_FAULT_LIMIT and UV_FAULT_LIMIT commands are not supported.
Data Contents
BIT(S) SYMBOL
b[15:0] Vout_command[15:0],
Vout_max[15:0],
Vout_margin_high[15:0],
Vout_margin_low[15:0],
Vout_ov_fault_limit[15:0],
Vout_ov_warn_limit[15:0],
Vout_uv_warn_limit[15:0],
Vout_uv_fault_limit[15:0],
Power_good_on[15:0],
Power_good_off[15:0]
OPERATION
These commands relate to output voltage. The data uses the L16 format.
Units: V
Input Voltage Related Commands
VIN_ON, VIN_OFF, VIN_OV_FAULT_LIMIT, VIN_OV_WARN_LIMIT, VIN_UV_WARN_LIMIT and VIN_UV_
FAULT_LIMIT
These commands use the same format and provide voltage supervising limits for the input voltage V_{IN_SNS}.
Data Contents
BIT(S) SYMBOL
b[15:0] Vin_on[15:0],
Vin_off[15:0],
Vin_ov_fault_limit[15:0],
Vin_ov_warn_limit[15:0],
Vin_uv_warn_limit[15:0],
Vin_uv_fault_limit[15:0]
OPERATION
These commands relate to input voltage. The data uses the L11 format.
Units: V.
2978fd
For more information www.linear.com/LTC2978
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