Datasheet

Exponent
IN(min)
V Mantissa 2= ´
Exponent
OUT(max)
V Mantissa 2= ´
TPS40400
SLUS930B –APRIL 2011– REVISED OCTOBER 2011 www.ti.com
Exponent
Fixed at –2.
Mantissa
Fixed at 12.
MFR_VIN_MAX (A1h)
The MFR_VIN_MAX returns a two-byte linear formatted result that represents the maximum voltage that the
TPS40400 is specified to operate at. The data is formatted as follows:
Command MFR_VIN_MAX
Format
Bit Position 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
Access r r r r r r r r r r r r r r r r
Function Exponent Mantissa
Default Value 1 1 1 1 0 0 0 0 0 1 0 1 0 0 0 0
The maximum input voltage can be found from:
(29)
This equals 20 V when evaluated with the default values.
Exponent
Fixed at –2.
Mantissa
Fixed at 80.
MFR_VOUT_MIN (A4h)
This command returns a two byte result that represents the minimum output voltage the TPS40400 supports.
Command MFR_VOUT_MIN
Format Linear, two's complement binary
Bit Position 7 6 5 4 3 2 1 0 7 6 5 4 3 2 1 0
Access r r r r r r r r r r r r r r r r
Function Mantissa
Default Value 0 0 0 0 0 0 1 0 0 1 1 0 0 1 1 0
The setting of the VOUT_MODE affects the results of this command as well. In the TPS40400, VOUT_MODE is
set to linear mode with an exponent of -10 and cannot be altered. The minimum nominal output voltage can be
found by:
(30)
This equals to 600 mV using the pre-set values. Using VOUT_TRIM, it is possible to adjust this voltage down to
approximately 450 mV.
Exponent
Fixed at –10.
Mantissa
Fixed at 614.
46 Submit Documentation Feedback Copyright © 2011, Texas Instruments Incorporated
Product Folder Link(s) :TPS40400