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LTC2979 Datasheet(PDF) 17 Page - Linear Technology

Part No. LTC2979
Description  16-Channel PMBus Low-Voltage Power System Manager
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Manufacturer  LINER [Linear Technology]
Direct Link  http://www.linear.com
Logo LINER - Linear Technology

LTC2979 Datasheet(HTML) 17 Page - Linear Technology

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LTC2979
17
2979f
For more information www.linear.com/LTC2979
Output Enables
n
Use appropriate pull-up resistors on all VOUT_ENn pins.
n
Verify that the absolute maximum ratings of the VOUT_
EN
n pins are not exceeded.
VIN Sense
n
No external resistive divider is required to sense VIN
over the range of 0V to 15V; VIN_SNS already has an
internal calibrated divider.
Logic Signals
n
Verify the absolute maximum ratings of the digital pins
(SCL, SDA, ALERTB, FAULTBzn, CONTROLn, SHARE_
CLK, WDI/RESETB, ASEL
n, PWRGD) are not exceeded.
n
Connect all SHARE_CLK pins in the system together
and pull up to 3.3V with a 5.49k resistor.
n
Do not leave CONTROLn pins floating. Pull up to 3.3V
with a 10k resistor.
n
Tie WDI/RESETB to VDD33 with a 10k resistor. Do not
connect a capacitor to the WDI/RESETB pin.
n
Tie WP to either VDD33 or GND. Do not leave floating.
APPLICATIONS INFORMATION
Unused Inputs
n
Connect all unused VSENSEPn, VSENSEMn and DACMn
pins to GND. Do not float unused inputs. Refer
to Unused ADC Sense Inputs in the Applications
Information section of the LTC2977 data sheet.
DAC Outputs
n
Select appropriate resistor for desired margin range.
Refer to the resistor selection tool in LTpowerPlay for
assistance.
For a more complete list of design considerations and
a schematic checklist, see the Design Checklist on the
LTC2979 product page:
www.linear.com/LTC2979


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