Related Parts ..........................................................104
Rev. E
For more information
www.analog.com
3
LTC2974
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
PIN CONFIGURATION
64 V
SENSEM1
63 V
SENSEP1
62 V
SENSEM2
61 V
SENSEP2
60 NC
59 NC
58 V
DAC3
57 V
DAC2
56 NC
55 NC
54 V
DAC1
53 V
DAC0
52 NC
51 NC
50 V
SENSEM3
49 V
SENSEP3
V
SENSEP0
1
V
SENSEM0
2
V
OUT_EN0
3
V
OUT_EN1
4
V
OUT_EN2
5
V
OUT_EN3
6
AUXFAULTB 7
DNC 8
V
IN_SNS
9
V
PWR
10
V
DD33
11
V
DD33
12
V
DD25
13
V
DD25
14
T
SENSE0
15
T
SENSE1
16
65
GND
48 I
SENSEM3
47 I
SENSEP3
46 I
SENSEM2
45 I
SENSEP2
44 I
SENSEM1
43 I
SENSEP1
42 I
SENSEM0
41 I
SENSEP0
40 REFM
39 GND
38 REFP
37 GND
36 ASEL1
35 ASEL0
34 T
SENSE3
33 CONTROL1
UP PACKAGE
64-LEAD (9mm
×
9mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JCtop
= 7°C/W,
θ
JCbottom
= 1°C/W
EXPOSED PAD (PIN 65) IS GND, MUST BE SOLDERED TO PCB
TOP VIEW
Supply Voltages:
V
PWR
...................................................... –0.3V to 15V
V
DD33
.................................................... –0.3V to 3.6V
V
DD25
.................................................. –0.3V to 2.75V
Digital Input/Output Voltages:
ALERTB, SDA, SCL, CONTROL0, CONTROL1,
CONTROL2, CONTROL3 ....................... –0.3V to 3.6V
PWRGD, SHARE_CLK, WDI/RESETB, WP,
FAULTB0, FAULTB1 .............................. –0.3V to 3.6 V
ASEL0, ASEL1 ....................................... –0.3V to 3.6V
Analog Voltages:
REFP ................................................... –0.3V to 1.35V
REFM .................................................... –0.3V to 0.3V
V
IN_SNS
.................................................. –0.3V to 15V
V
SENSEP[3:0]
............................................. –0.3V to 6V
V
SENSEM[3:0]
............................................. –0.3V to 6V
I
SENSEP[3:0]
............................................... –0.3V to 6V
I
SENSEM[3:0]
.............................................. –0.3V to 6V
V
OUT_EN[3:0]
, AUXFAULTB ...................... –0.3V to 15V
V
DAC[3:0]
.................................................. –0.3V to 6V
T
SENSE[3:0]
............................................ –0.3V to 3.6V
Operating Junction Temperature Range:
LTC2974C ................................................ 0°C to 70°C
LTC2974I............................................ –40°C to 105°C
Storage Temperature Range ................ –65°C to 150°C*
Maximum Junction Temperature ........................ 125°C*
*See OPERATION section for detailed EEPROM de-
rating information for junction temperatures in excess
of 105°C.
ORDER INFORMATION
LEAD FREE FINISH
LTC2974CUP#PBF
LTC2974IUP#PBF
TAPE AND REEL
LTC2974CUP#TRPBF
LTC2974IUP#TRPBF
PART MARKING*
LTC2974UP
LTC2974UP
PACKAGE DESCRIPTION
64-Lead (9mm × 9mm) Plastic QFN
64-Lead (9mm × 9mm) Plastic QFN
TEMPERATURE RANGE
0°C to 70°C
–40°C to 105°C
Contact the factory for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
Tape and reel specifications.
Some packages are available in 500 unit reels through designated sales channels with #TRMPBF suffix.
PWRGD 17
SHARE_CLK 18
GND 19
GND 20
GND 21
CONTROL2 22
CONTROL3 23
WDI/RESETB 24
FAULTB0 25
FAULTB1 26
T
SENSE2
27
WP 28
SDA 29
SCL 30
ALERTB 31
CONTROL0 32
Rev. E
4
For more information
www.analog.com
LTC2974
ELECTRICAL CHARACTERISTICS
SYMBOL
V
PWR
I
PWR
I
VDD33
V
UVLO_VDD33
PARAMETER
V
PWR
Supply Input Operating Range
V
PWR
Supply Current
V
DD33
Supply Current
V
DD33
Undervoltage Lockout
V
DD33
Undervoltage Lockout
Hysteresis
V
DD33
Supply Input Operating Range
Regulator Output Voltage
V
DD25
t
INIT
V
PWR
= V
DD33
4.5V ≤ V
PWR
≤ 15V
l
l
l
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
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Embedded System
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