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LTM4676A 데이터시트(PDF) 49 Page - Linear Technology

부품명 LTM4676A
상세설명  Dual 13A or Single 26A 關Module Regulator with Digital Power System Management
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제조업체  LINER [Linear Technology]
홈페이지  http://www.linear.com
Logo LINER - Linear Technology

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LTM4676A
49
4676afa
For more information www.linear.com/LTM4676A
applicaTions inForMaTion
Table 4. FSWPHCFG Pin Strapping Look-Up Table to Set the LTM4676A's Switching Frequency and Channel Phase-Interleaving
Angle (Not Applicable if MFR_CONFIG_ALL[6] = 1b)
RFSWPHCFG*
(kΩ)
SWITCHING
FREQUENCY (kHz)
θSYNC TO θ0
θSYNC TO θ1
bits [2:0] of
MFR_PWM_CONFIG
bit [4] of
MFR_CONFIG_ALL
Open
NVM; LTM4676A
Default = 500
NVM; LTM4676A
Default = 0°
NVM; LTM4676A
Default = 180°
NVM; LTM4676A
Default = 000b
NVM; LTM4676A
Default = 0b
32.4
250
180°
000b
0b
22.6
350
180°
000b
0b
18.0
425
180°
000b
0b
15.4
575
180°
000b
0b
12.7
650
180°
000b
0b
10.7
750
180°
000b
0b
9.09
1000
180°
000b
0b
7.68
500
120°
240°
100b
0b
6.34
500
90°
270°
001b
0b
5.23
Sync Slave**
240°
010b
1b
4.22
Sync Slave**
120°
011b
1b
3.24
Sync Slave**
60°
240°
101b
1b
2.43
Sync Slave**
120°
300°
110b
1b
1.65
Sync Slave**
90°
270°
001b
1b
0.787
Sync Slave**
180°
000b
1b
0
Sync Slave**
120°
240°
100b
1b
*RFSWPHCFG value indicated is nominal. Select RFSWPHCFG from a resistor vendor such that its value is always within 3% of the value indicated in
the table. Take into account 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
RFSWPHCFG’s value over time. All such effects must be taken into account in order for resistor pin-strapping to yield the expected result at every
SVIN power-up and/or every execution of MFR_RESET or RESTORE_USER_ALL, over the lifetime of one’s product.
**The “Sync Slave” setting results in MFR_CONFIG_ALL[4] being set to 1b and FREQUENCY_SWITCH being set according to user-configurable
EEPROM contents corresponding to Command 0x33 (factory default: 500kHz). In this configuration, the module’s switching frequency
synchronizes to the SYNC signal, provided that the SYNC pin is driven in a manner consistent with specifications (see Switching Frequency and
Phase subsection of the Applications Information section for details).


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