Or 23 Channels, Set Top Resistor To 14.3K - Analog Devices LTM4683 Manual

LTM4683
OPERATION
Table 3. FSWPH_nn_CFG Pin Strapping Look-Up Table to Set the LTM4683's Switching Frequency and Channel Phase-Interleaving
Angle (Not Applicable if MFR_CONFIG_ALL[6] = 1b), nn = 01 or 23 Channels, Set Top Resistor to 14.3k.
R * SWITCHING
FSWPH_CFG
(kΩ) FREQUENCY (kHz)
NVM; LTM4683
Open Default = 425
32.4
22.6
18.0
15.4
12.7
10.7
7.68
6.34
5.23
4.22
3.24
2.43
1.65
0.787
0
*R value indicated is nominal. Select R
FSWPH_nn_CFG
in the table. Consider resistor initial tolerance, T.C.R. and resistor operating temperatures, soldering heat/IR reflow, and endurance of the resistor over
its lifetime. Thermal shock/cycling, moisture (humidity) and other effects (depending on one's specific application) could also affect R
value over time. All such effects must be considered in order for resistor pin-strapping to yield the expected result at every SV
execution of MFR_RESET or RESTORE_USER_ALL, over the lifetime of one's product.
**External setting corresponds to FREQUENCY_SWITCH (Register 0x33) value set to 0x0000; the device synchronizes its switching frequency to that of
the clock provided on the SYNC_nn pin, provided MFR_CONFIG_ALL[4] = 1b. R
Example:
V
DD25
36
θSYNC TO θ0,2
NVM; LTM4683
Default = 0°
250 0°
350 0°
425 0°
575 0°
650 0°
750 0°
500 120°
500 90°
External** 0°
External** 0°
External** 60°
External** 120°
External** 90°
External** 0°
External** 120°
from a resistor vendor such that its value is always within 3% of the value indicated
FSWPH_nn_CFG
_
nn
14.3k
FSWPH_ _CFG PIN
nn
R CFG BOT
FSWPH_
For more information
BITS [2:0] OF
θSYNC TO θ1,3 MFR_PWM_CONFIG
NVM; LTM4683 NVM; LTM4683
Default = 180° Default = 000b
180°
180°
180°
180°
180°
180°
240°
270°
240°
120°
240°
300°
270°
180°
240°
= 14.3k is external to the part.
TOP
www.analog.com
BIT [4] OF
MFR_CONFIG_ALL
NVM; LTM4683
Default = 0b
000b 0b
000b 0b
000b 0b
000b 0b
000b 0b
000b 0b
100b 0b
001b 0b
010b 1b
011b 1b
101b 1b
110b 1b
001b 1b
000b 1b
100b 1b
FSWPH_nn_CFG
power-up and/or every
IN
's
Rev. 0