SLUSCT1B Data sheet

SLUSCT1B June 2017 – January 2019 TPS53681

PRODUCTION DATA.

Package Options

Mechanical Data (Package|Pins)

RSB|40
- MPQF185C

Thermal pad, mechanical data (Package|Pins)

RSB|40
- QFND255H

Orderable Information

7.5.9.2 (28h) VOUT_DROOP

The VOUT_DROOP command sets the rate, in mV/A (mΩ) at which the output voltage decreases (or increases) with increasing (or decreasing) output current for use with adaptive voltage positioning. This is also referred to as the DC Load Line (DCLL).

VOUT_DROOP is a linear format command. The VOUT_DROOP command must be accessed through Read Word/Write Word transactions.

VOUT_DROOP is a paged register. In order to access VOUT_DROOP for channel A, PAGE must be set to 00h. In order to access the VOUT_DROOP register for channel B, PAGE must be set to 01h. For simultaneous access of channels A and B, the PAGE command must be set to FFh.

15	14	13	12	11	10	9	8
R	R	R	R	R	RW	RW	RW
VDROOP_EXP					VDROOP_MAN

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

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

Figure 32. VOUT_DROOP

Table 34. VOUT_DROOP Register Field Descriptions

Bit	Field	Type	Reset	Description
15:11	VDROOP_EXP	R	11010b	Linear two's complement fixed exponent, –6. LSB = 0.015625 mΩ
10:0	VDROOP_MAN	RW	NVM	Linear two's complement mantissa. See table of acceptable values below, note that Channel A and Channel B support different acceptable values of VOUT_DROOP.

The table below summarizes the acceptable values of VOUT_DROOP for channel A and channel B. Attempts to write any value other than those specified below will be treated as invalid data - invalid data will be ignored, the appropriate flags in STATUS_CML and STATUS_WORD will be set, and the PMB_ALERT will be asserted to notify the system host of an invalid transaction.

Table 35. Acceptable VOUT_DROOP Values

Bin	VOUT_DROOP (hex)	Supported by Channel A	Supported by Channel B	DC Load Line (mΩ)
0	D000h	Yes	Yes	0
1	D008h	Yes	Yes	0.125
2	D010h	Yes	Yes	0.25
3	D014h	Yes	Yes	0.3125
4	D018h	Yes	Yes	0.375
5	D01Ch	Yes	Yes	0.4375
6	D020h	Yes	Yes	0.5
7	D024h	Yes	Yes	0.5625
8	D028h	Yes	Yes	0.625
9	D030h	Yes	Yes	0.7031
10	D033h	Yes	Yes	0.7969
11	D034h	Yes	Yes	0.8125
12	D035h	Yes	Yes	0.8281
13	D036h	Yes	Yes	0.8438
14	D037h	Yes	Yes	0.8594
15	D038h	Yes	Yes	0.875
16	D039h	Yes	No	0.8906
17	D03Ah	Yes	No	0.9063
18	D03Bh	Yes	No	0.9219
19	D03Ch	Yes	No	0.9375
20	D03Dh	Yes	No	0.9531
21	D03Eh	Yes	No	0.9688
22	D03Fh	Yes	No	0.9844
23	D040h	Yes	No	1
24	D041h	Yes	No	1.0156
25	D042h	Yes	No	1.0313
26	D043h	Yes	No	1.0469
27	D044h	Yes	No	1.0625
28	D048h	Yes	No	1.125
29	D050h	Yes	No	1.25
30	D058h	Yes	No	1.375
31	D060h	Yes	No	1.5
32	D068h	Yes	No	1.625
33	D070h	Yes	No	1.75
34	D078h	Yes	No	1.875
35	D07Ch	Yes	No	1.9375
36	D080h	Yes	No	2
37	D084h	Yes	No	2.0625
38	D088h	Yes	No	2.125
39	D08Ch	Yes	No	2.1875
40	D090h	Yes	No	2.25
41	D098h	Yes	No	2.328
42	D09Bh	Yes	No	2.4218
43	D09Ch	Yes	No	2.4375
44	D09Dh	Yes	No	2.4531
45	D09Eh	Yes	No	2.4687
46	D09Fh	Yes	No	2.4843
47	D0A0h	Yes	No	2.5
48	D0A1h	Yes	No	2.5156
49	D0A2h	Yes	No	2.5312
50	D0A3h	Yes	No	2.5468
51	D0A4h	Yes	No	2.5625
52	D0A5h	Yes	No	2.5781
53	D0A6h	Yes	No	2.5937
54	D0A7h	Yes	No	2.609
55	D0A8h	Yes	No	2.625
56	D0A9h	Yes	No	2.6406
57	D0AAh	Yes	No	2.6562
58	D0ABh	Yes	No	2.6718
59	D0ACh	Yes	No	2.6875
60	D0B0h	Yes	No	2.75
61	D0B8h	Yes	No	2.875
62	D0C0h	Yes	No	3
63	D0C8h	Yes	No	3.125