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

6.6.21 (24h) VOUT_MAX

CMD Address	24h
Write Transaction:	Write Word
Read Transaction:	Read Word
Format:	ULINEAR16, Absolute Only per VOUT_MODE
Phased:	No
NVM Back-up:	EEPROM or Pin Detection
Updates:	On-the-fly

The VOUT_MAX command sets an upper limit on the output voltage the unit and can command regardless of any other commands or combinations. The intent of this command is to provide a safeguard against a user accidentally setting the output voltage to a possibly destructive level.

Figure 6-27 (24h) VOUT_MAX Register Map

15	14	13	12	11	10	9	8
RW	RW	RW	RW	RW	RW	RW	RW
VOUT_MAX (High Byte)

7	6	5	4	3	2	1	0
RW	RW	RW	RW	RW	RW	RW	RW
VOUT_MAX (Low Byte)

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

Table 6-35 Register Field Descriptions

Bit	Field	Access	Reset	Description
15:0	VOUT_ MAX	RW	NVM	Maximum output voltage. ULINEAR16 absolute per the setting of VOUT_ MODE. Refer to the following description for data validity.

While conversion is enabled, any output voltage change (including VOUT_COMMAND, VOUT_TRIM, margin operations) that causes the new target voltage to be greater than the current value of VOUT_MAX will cause the VOUT_MAX_MIN_WARNING fault condition, unless VOUT is limited by reference DAC range of 0.75 V/VOUT_SCALE_LOOP. This result causes the TPS546B24S to:

Set to the output voltage to current value of VOUT_MAX, at the slew rate defined by VOUT_TRANSITION_RATE.
Set the NONE OF THE ABOVE bit in the STATUS_BYTE.
Set the VOUT bit in the STATUS_WORD.
Set the VOUT_MIN_MAX warning bit in STATUS_VOUT.
Notify the host per PMBus 1.3.1 Part II specification, section 10.2.

Although the scenario is uncommon, note that the same response results if the user attempted to program VOUT_MAX less than the current output voltage target.