LTC3883 Datasheet, PDF (36/112 Pages) Linear Technology – Single Phase Step-Down DC/DC Controller with Digital Power System Management

LTC3883/LTC3883-1
PMBus Command Summary
*Data Format
L11 Linear_5s_11s
L16 Linear_16u
Reg Register
I16 Integer Word
CF Custom Format
ASC ASCII Format
PMBus data field b[15:0]
Value = Y • 2^N
where N = b[15:11] is a 5-bit two’s complement integer and Y = b[10:0] is an 11-bit
two’s complement integer
Example:
For b[15:0] = 0x9807 = ‘b10011_000_0000_0111
Value = 7 • 2^–13 = 854 • 10^–6
From “PMBus Spec Part II: Paragraph 7.1”
PMBus data field b[15:0]
Value = Y • 2^N
where Y = b[15:0] is an unsigned integer and N = Vout_mode_parameter is a 5-bit two’s
complement exponent that is hardwired to –12 decimal
Example:
For b[15:0] = 0x9807 = ‘b1001_1000_0000_0000
Value = 19456 • 2^–12 = 4.75
From “PMBus Spec Part II: Paragraph 8.2”
PMBus data field b[15:0] or b[7:0].
Bit field meaning is defined in detailed PMBus Command Description.
PMBus data field b[15:0]
Value = Y
where Y = b[15:0] is a 16 bit unsigned integer
Example:
For b[15:0] = 0x9807 = ‘b1001_1000_0000_0111
Value = 38919 (decimal)
Value is defined in detailed PMBus Command Description.
This is often an unsigned or two’s complement integer scaled by an MFR specific
constant.
A variable length string of text characters conforming to ISO/IEC 8859-1 standard.
3883f
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