Datasheet

LTC2945
3
2945fa
For more information www.linear.com/LTC2945
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LTC2945CUD#PBF LTC2945CUD#TRPBF LFWK
12-Lead (3mm × 3mm) Plastic QFN
0°C to 70°C
LTC2945IUD#PBF LTC2945IUD#TRPBF LFWK
12-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
LTC2945CUD-1#PBF LTC2945CUD-1#TRPBF LFYX
12-Lead (3mm × 3mm) Plastic QFN
0°C to 70°C
LTC2945IUD-1#PBF LTC2945IUD-1#TRPBF LFYX
12-Lead (3mm × 3mm) Plastic QFN
–40°C to 85°C
LTC2945CMS#PBF LTC2945CMS#TRPBF 2945 12-Lead Plastic MSOP 0°C to 70°C
LTC2945IMS#PBF LTC2945IMS#TRPBF 2945 12-Lead Plastic MSOP –40°C to 85°C
LTC2945CMS-1#PBF LTC2945CMS-1#TRPBF 29451 12-Lead Plastic MSOP 0°C to 70°C
LTC2945IMS-1#PBF LTC2945IMS-1#TRPBF 29451 12-Lead Plastic MSOP –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
elecTrical characTerisTics
SYMBOL PARAMETER CONDITIONS MIN TYP MAX UNITS
SUPPLIES
V
DD
V
DD
Supply Voltage Range
l
4 80 V
V
INTVCC
INTV
CC
Supply Voltage Range
l
2.7 5.9 V
I
DD
V
DD
Supply Current V
DD
= 48V, INTV
CC
Open
Shutdown
l
l
0.8
40
1.2
70
mA
µA
I
CC
INTV
CC
Supply Current INTV
CC
= V
DD
= 5V
Shutdown, INTV
CC
= V
DD
= 5V
l
l
0.6
20
0.9
80
mA
µA
I
CCSRC
INTV
CC
Linear Regulator Output Current V
DD
= 7V
l
–10 mA
V
CC
INTV
CC
Linear Regulator Voltage 7V < V
DD
< 80V, I
LOAD
= 1mA
l
4.5 5 5.5 V
ΔV
CC
INTV
CC
Linear Regulator Load Regulation 7V < V
DD
< 80V, I
LOAD
= 1mA to 10mA
l
100 200 mV
V
CCZ
INTV
CC
Shunt Regulator Voltage V
DD
= 48V, I
CC
= 1mA
l
5.9 6.3 6.7 V
ΔV
CCZ
INTV
CC
Shunt Regulator Load Regulation V
DD
= 48V, I
CC
= 1mA to 35mA
l
250 mV
V
CC(UVL)
INTV
CC
Supply Undervoltage Lockout INTV
CC
Rising, V
DD
= INTV
CC
l
2.2 2.6 2.69 V
V
DD(UVL)
V
DD
Supply Undervoltage Lockout V
DD
Rising, INTV
CC
Open
l
2.9 3.2 3.5 V
V
DDI2C(RST)
V
DD
I
2
C Logic Reset V
DD
Falling, INTV
CC
Open
l
2 2.5 V
V
CCI2C(RST)
INTV
CC
I
2
C Logic Reset INTV
CC
Falling, V
DD
= INTV
CC
l
1.5 1.8 V
SENSE INPUTS
V
CM
SENSE
+
, SENSE
–
Common Mode Voltage
l
0 80 V
I
SENSE
+
(HI)
48V SENSE
+
Input Current SENSE
+
, SENSE
–
, V
DD
= 48V
Shutdown
l
l
100 150
2
µA
µA
I
SENSE
–
(HI)
48V SENSE
–
Input Current SENSE
+
, SENSE
–
, V
DD
= 48V
Shutdown
l
l
20
1
µA
µA
I
SENSE
+
(LO)
0V SENSE
+
Source Current SENSE
+
, SENSE
–
= 0V V
DD
= 48V
Shutdown
l
l
–10
–2
µA
µA
I
SENSE
–
(LO)
0V SENSE
–
Source Current SENSE
+
, SENSE
–
= 0V, V
DD
= 48V
Shutdown
l
l
–5
±1
µA
µA
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. V
DD
is from 4V to 80V unless otherwise noted. (Note 2)