LTC2978A Datasheet, PDF (4/80 Pages) Linear Technology – 8-Channel PMBus Power System Manager Featuring Accurate Output Voltage Measurement

LTC2978A
Absolute Maximum Ratings
(Notes 1, 2)
Supply Voltages:
V_PWR to GND.......................................... –0.3V to 15V
V_DD33 to GND........................................ –0.3V to 3.6V
V_DD25 to GND...................................... –0.3V to 2.75V
Digital Input/Output Voltages:
ALERTB, SDA, SCL, CONTROL0,
CONTROL1............................................. –0.3V to 5.5V
PWRGD, SHARE_CLK,
WDI/RESETB, WP.....................–0.3V to V_DD33 + 0.3V
FAULTB00, FAULTB01, FAULTB10,
FAULTB11.................................–0.3V to V_DD33 + 0.3V
ASEL0, ASEL1...........................–0.3V to V_DD33 + 0.3V
Analog Voltages:
REFP.................................................... –0.3V to 1.35V
REFM to GND......................................... –0.3V to 0.3V
V_{IN_SNS} to GND...................................... –0.3V to 15V
V_SENSEP[7:0] to GND.................................. –0.3V to 6V
V_SENSEM[7:0] to GND................................. –0.3V to 6V
V_{OUT_EN[3:0]}, V_{IN_EN} to GND................... –0.3V to 15V
V_{OUT_EN[7:4]} to GND.................................. –0.3V to 6V
V_DACP[7:0] to GND..................................... –0.3V to 6V
V_DACM[7:0] to GND ................................. –0.3V to 0.3V
Operating Junction Temperature Range:
LTC2978AC............................................... 0°C to 70°C
LTC2978AI............................................–40°C to 85°C
Storage Temperature Range................... –65°C to 125°C
Maximum Junction Temperature......................... 125°C*
Pin Configuration
TOP VIEW
V_SENSEM6 1
V_SENSEP7 2
V_SENSEM7 3
V_{OUT_EN0} 4
V_{OUT_EN1} 5
V_{OUT_EN2} 6
V_{OUT_EN3} 7
V_{OUT_EN4} 8
V_{OUT_EN5} 9
V_{OUT_EN6} 10
V_{OUT_EN7} 11
V_{IN_EN} 12
DNC 13
V_{IN_SNS} 14
V_PWR 15
V_DD33 16
65
GND
48 V_SENSEP3
47 V_SENSEM2
46 V_SENSEP2
45 V_DACM2
44 V_DACP2
43 V_SENSEM1
42 V_SENSEP1
41 V_DACM1
40 V_DACP1
39 V_DACP0
38 V_DACM0
37 V_SENSEM0
36 V_SENSEP0
35 REFM
34 REFP
33 ASEL1
UP PACKAGE
64-LEAD (9mm × 9mm) PLASTIC QFN
T_JMAX = 125°C, θ_JA-TOP = 28°C/W, θ_JC-BOTTOM = 1°C/W
EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB
*See OPERATION section for detailed EEPROM de-
rating information for junction temperatures in excess
of 85°C.
Order Information
LEAD FREE FINISH
TAPE AND REEL
PART MARKING* PACKAGE DESCRIPTION
JUNCTION TEMPERATURE RANGE
LTC2978ACUP#PBF
LTC2978ACUP#TRPBF LTC2978AUP
64-Lead (9mm × 9mm) Plastic QFN 0°C to 70°C
LTC2978AIUP#PBF
LTC2978AIUP#TRPBF LTC2978AUP
64-Lead (9mm × 9mm) Plastic QFN –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping
container. Consult LTC Marketing for information on non-standard lead based finish parts.
For more information on lead free part marking, go to: http://www.linear.com/leadfree/
For more information on tape and reel specifications, go to: http://www.linear.com/tapeandreel/
2978af
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For more information www.linear.com/LTC2978A