Related Parts ...................................................................112
2972fa
For more information
www.linear.com/LTC2972
3
LTC2972
ABSOLUTE MAXIMUM RATINGS
(Notes 1, 2)
PIN CONFIGURATION
TOP VIEW
AUXFAULTB
V
SENSEM1
V
OUT_EN0
V
OUT_EN1
V
SENSEP1
I
SENSEM1
35
34 I
SENSEP1
33 V
SENSEM0
32 V
SENSEP0
31 I
SENSEM0
30 I
SENSEP0
45
GND
29 REFM
28 REFP
27 ASEL1
26 ASEL0
25 V
DDIO
24 CONTROL1
23 CONTROL0
13
SHARE_CLK
14
PG0
15
PG1
16 17
WDI/RESETB
FAULTB0
18
FAULTB1
19 20
WP
SDA
21
SCL
22
ALERTB
I
IN_SNSM
I
IN_SNSP
V
DAC1
V
DAC0
38
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, PG[1:0], V
DDIO
................... –0.3V to 3.6V
PWRGD, SHARE_CLK, WDI/RESETB,
WP, FAULTB0, FAULTB1........................ –0.3V to 3.6V
ASEL0, ASEL1 ....................................... –0.3V to 3.6V
Analog Voltages:
REFP ................................................... –0.3V to 1.35V
REFM .................................................... –0.3V to 0.3V
V
IN_SNS
, V
IN_SNS_CAP
............................ –0.3V to 15V
I
IN_SNSP
, I
IN_SNSM
to V
IN_SNS
............... –0.3V to 0.3V
V
SENSEP[1:0]
.............................................. –0.3V to 6V
V
SENSEM[1:0]
............................................. –0.3V to 6V
I
SENSEP[1:0]
............................................... –0.3V to 6V
I
SENSEM[1:0]
.............................................. –0.3V to 6V
V
OUT_EN[1:0]
, AUXFAULTB ...................... –0.3V to 15V
V
DAC[1:0]
................................................... –0.3V to 6V
T
SENSE[1:0]
............................................. –0.3V to 3.6V
I
IN_SNSP
, I
IN_SNSM
.................................. –0.3V to 15V
Operating Junction Temperature Range:
LTC2972C ................................................ 0°C to 70°C
LTC2972I ........................................... –40°C to 105°C
Storage Temperature Range ................ –65°C to 150°C*
Maximum Junction Temperature ........................ 125°C*
*See OPERATION section for detailed EEPROM derating
information for junction temperatures in excess of 105°C.
44
V
IN_SNS_CAP
1
GND 2
DNC 3
V
IN_SNS
4
V
PWR
5
V
DD33
6
V
DD33
7
V
DD25
8
V
DD25
9
T
SENSE0
10
T
SENSE1
11
PWRGD 12
43
42
41
40 39
37 36
UJF PACKAGE
44-LEAD (6mm × 7mm) PLASTIC QFN
T
JMAX
= 125°C,
θ
JCtop
= 13.57°C/W,
θ
JCbottom
= 2.82°C/W
EXPOSED PAD (PIN 45) IS GND, MUST BE SOLDERED TO PCB
ORDER INFORMATION
TUBE
LTC2972CUJF#PBF
LTC2972IUJF#PBF
TAPE AND REEL
LTC2972CUJF#TRPBF
LTC2972IUJF#TRPBF
http://www.linear.com/product/LTC2972#orderinfo
PART MARKING*
LTC2972UJF
LTC2972UJF
PACKAGE DESCRIPTION
44-Lead (6mm × 7mm) Plastic QFN
44-Lead (6mm × 7mm) Plastic QFN
JUNCTION TEMPERATURE RANGE
0°C to 70°C
–40°C to 105°C
Consult ADI Marketing for parts specified with wider operating temperature ranges. *The temperature grade is identified by a label on the shipping container.
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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
4
2972fa
For more information
www.linear.com/LTC2972
LTC2972
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
Regulator Output Short-Circuit
Current
V
DD25
Regulator Output Voltage
Regulator Output Short-Circuit
Current
t
INIT
V
DDIO
R
IN
V
REF
Initialization Time
V
DDIO
Input Operating Range
V
DDIO
Input Resistance
Output Voltage (Note 3)
Temperature Coefficient
Hysteresis
ADC Characteristics
V
IN_ADC
Voltage Sense Input Range
Differential Voltage:
V
IN_ADC
= (V
SENSEPn
– V
SENSEMn
)
Single-Ended Voltage: V
SENSEMn
Current Sense Input Range
Single-Ended Voltage: I
SENSEPn
, I
SENSEMn
Differential Current Sense Voltage:
V
IN_ADC
= (I
SENSEPn
– I
SENSEMn
)
Mfr_config_imon_sel = 0
Mfr_config_imon_sel = 1
N_ADC
Voltage Sense Resolution
Current Sense Resolution
with IOUT_CAL_GAIN = 1Ω
0V ≤ V
IN_ADC
≤ 6V, READ_VOUT
0mV ≤ |V
IN_ADC
| < 16mV (Note 5)
16mV ≤ |V
IN_ADC
| < 32mV
32mV ≤ |V
IN_ADC
| < 63.9mV
63.9mV ≤ |V
IN_ADC
| < 127.9mV
127.9mV ≤ |V
IN_ADC
|
Voltage Sense Inputs V
IN_ADC
≥ 1V
Voltage Sense Inputs 0 ≤ V
IN_ADC
≤ 1V
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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