SLUSF28 Data sheet

SLUSF28 November 2023 TPS546A24S

PRODUCTION DATA

Package Options

Mechanical Data (Package|Pins)

RVF|40
- MPQF268C

Thermal pad, mechanical data (Package|Pins)

RVF|40
- QFND333E

Orderable Information

6.6.45 (55h) VIN_OV_FAULT_LIMIT

CMD Address	55h
Write Transaction:	Write Word
Read Transaction:	Read Word
Format:	SLINEAR11 per CAPABILITY
Phased:	No
NVM Back-up:	EEPROM
Updates:	On-the-fly

The (55h) VIN_OV_FAULT_LIMIT command sets the PVIN voltage, in volts, when a VIN_OV_FAULT is declared. The response to a detected VIN_OV_FAULT is determined by the settings of (56h) VIN_OV_FAULT_RESPONSE. (55h) VIN_OV_FAULT_LIMIT is typically used to stop switching in the event of excessive input voltage, which can result in over-stress damage to the power FETs due to ringing on the SW node.

Figure 6-51 (55h) VIN_OV_FAULT_LIMIT Register Map

15	14	13	12	11	10	9	8
RW	RW	RW	RW	RW	RW	RW	RW
VINOVF_EXP					VINOVF_MAN

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

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

Table 6-62 Register Field Descriptions

Bit	Field	Access	Reset	Description
15:11	VINOVF_ EXP	RW	11110b	Linear format two’s complement exponent
10:0	VINOVF_ MAN	RW	NVM	Linear format two’s complement mantissa

Attempts to write (55h) VIN_OV_FAULT_LIMIT beyond the supported range will be considered invalid/unsupported data and cause the TPS546A24S 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. (55h) VIN_OV_FAULT_LIMIT supports values from 5 V to 22 V in 0.25-V steps. Following a Power Cycle or STORE/RESTORE, (55h) VIN_OV_FAULT_LIMIT will be restored to the nearest supported value.