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LTC3889 Datasheet(PDF) 84 Page - Analog Devices

Part # LTC3889
Description  Dual Loop 8-Phase Step-Down DC/DC Controller with Digital Power System Management
PDF  118 Pages
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Manufacturer  AD [Analog Devices]
Direct Link  http://www.analog.com
Logo AD - Analog Devices

LTC3889 Datasheet(HTML) 84 Page - Analog Devices

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LTC3888/LTC3888-1/
LTC3888-2
84
Rev. B
For more information www.analog.com
PMBus COMMAND DETAILS (PWM Configuration)
Bit Definitions
BIT
MEANING
7
(Reserved, must write as 0)
6
Slave IOUT Telemetry:
0: The LTC3888-1 provides continuous IOUT telemetry for all enabled phases.
1: The LTC3888-1 only provides IOUT telemetry for master channels PWM0 and PWM1.
5
SPI Logic Level (LTC3888 Only):
0: The LTC3888 SPI Interface uses SMBus 2.0V Input Logic Levels.
1: The LTC3888 SPI Interface uses 1.8V CMOS Input Logic Levels.
4
VOUT_OV_FAULT HW Response:
0: No special low level response, master phase obeys VOUT_OV_FAULT_RESPONSE of immediate off (PWM Hi-Z).
1: PWM of master phase driven low during VOUT_OV_FAULT, synchronous bottom power FET attempts to discharge VOUT with rail off.
3
Phase Expansion:
0: The power-good state for Channel 0 is output on PGOOD0.
1: A phase expansion clock (CLKOUT) is output on PGOOD0 to drive SYNC on a second LTC3888-1.
[2:0]
Value
Master/Slave Configuration
Master
Configuration / Slave
Phase (*)
111
PWM0
7-Phase
0
PWM0
PWM2
51.4
PWM0
PWM3
154.3
PWM0
PWM4
205.7
PWM0
PWM5
102.9
PWM0
PWM6
257.1
PWM0
PWM7
308.6
PWM1
1-Phase
25.7
110
PWM0
(6-Phase)
0
PWM0
PWM2
60
PWM0
PWM3
180
PWM0
PWM4
240
PWM0
PWM5
120
PWM0
PWM6
300
PWM1
(2-Phase)
30
PWM1
PWM7
210
101
PWM0
(6-Phase)
0
PWM0
PWM2
60
PWM0
PWM3
180
PWM0
PWM4
240
PWM0
PWM5
120
PWM0
PWM6
300
PWM1
(1-Phase)
30
PWM7
Off



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