SLUSF27 Data sheet

SLUSF27 November 2023 TPS546B24S

PRODUCTION DATA

Package Options

Mechanical Data (Package|Pins)

RVF|40
- MPQF268C

Thermal pad, mechanical data (Package|Pins)

RVF|40
- QFND333E

Orderable Information

6.6.28 (35h) VIN_ON

CMD Address	35h
Write Transaction:	Write Word
Read Transaction:	Read Word
Format:	SLINEAR11, per CAPABILITY
Phased:	No
NVM Back-up:	EEPROM
Updates:	On-the-fly

VIN_ON command sets the value of the input voltage, in Volts, at which the unit must start power conversion.

Figure 6-34 (35h) VIN_ON Register Map

15	14	13	12	11	10	9	8
RW	RW	RW	RW	RW	RW	RW	RW
VON_EXP					VON_MAN

7	6	5	4	3	2	1	0
RW	RW	RW	RW	RW	RW	RW	RW
VON_MAN

LEGEND: R/W = Read/Write; R = Read only

Table 6-44 Register Field Descriptions

Bit	Field	Access	Reset	Description
15:11	VON_ EXP	RW	11110b	Linear format two’s complement exponent, -2
10:0	VON_ MAN	RW	NVM	Linear format two’s complement mantissa. Refer to the following text for more information.

Attempts to write (35h) VIN_ON to any value outside those specified as valid will be considered invalid/unsupported data and cause the TPS546B24S to respond by flagging the appropriate status bits and notifying the host according to the PMBus 1.3.1 Part II specification section 10.9.3.

Command Resolution and NVM Store/Restore Behavior

(35h) VIN_ON and (36h) VIN_OFF have limited hardware range and resolution as well as limited NVM allocation. While the command will accept any binary value within the valid range, values not exactly represented by the hardware resolution will be rounded down to the next lower supported threshold for implementation or upon restore from NVM during Power-On Reset or (16h) RESTORE_USER_ALL. (35h) VIN_ON hardware supports all values from 2.50 V to 15.75 V in 0.25-V steps.

Note that the LOW_VIN fault condition is masked until the sensed input voltage exceeds the VIN_ON threshold for the first time following a power-on reset. Control/Enable pin toggles and EEPROM store/restore operations do not reset this masking.