Operating Junction Temperature Range (Notes 2, 10)
E, I Grade ........................................... –40°C to 125°C
MP Grade........................................... –55°C to 125°C
Storage Temperature Range................... –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
MS8E Package Only .......................................... 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
OUT 1
OUT 2
SET 3
7
6 IN
5 IN
4 V
CONTROL
OUT
OUT
OUT
SET
1
2
3
4
8
7
6
5
IN
IN
NC
V
CONTROL
9
DCB PACKAGE
6-LEAD (2mm 3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 73°C/W,
θ
JC
= 10.6°C/W
EXPOSED PAD (PIN 7) IS OUT, MUST BE SOLDERED TO V
OUT
ON PCB
SEE THE APPLICATIONS INFORMATION SECTION
MS8E PACKAGE
8-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 60°C/W,
θ
JC
= 10°C/W
EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO V
OUT
ON PCB
SEE THE APPLICATIONS INFORMATION SECTION
ORDER INFORMATION
LEAD FREE FINISH
LT3085EDCB#PBF
LT3085EMS8E#PBF
LT3085IDCB#PBF
LT3085IMS8E#PBF
LT3085MPMS8E#PBF
LEAD BASED FINISH
LT3085EDCB
LT3085EMS8E
LT3085IDCB
LT3085IMS8E
LT3085MPMS8E
TAPE AND REEL
LT3085EDCB#TRPBF
LT3085EMS8E#TRPBF
LT3085IDCB#TRPBF
LT3085IMS8E#TRPBF
LT3085MPMS8E#TRPBF
TAPE AND REEL
LT3085EDCB#TR
LT3085EMS8E#TR
LT3085IDCB#TR
LT3085IMS8E#TR
LT3085MPMS8E#TR
PART MARKING*
LDQQ
LTDQP
LDQQ
LTDQP
LTDWQ
PART MARKING*
LDQQ
LTDQP
LDQQ
LTDQP
LTDWQ
PACKAGE DESCRIPTION
6-Lead (2mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
6-Lead (2mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
PACKAGE DESCRIPTION
6-Lead (2mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
6-Lead (2mm
×
3mm) Plastic DFN
8-Lead Plastic MSOP
8-Lead Plastic MSOP
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–55°C to 125°C
Consult LTC 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/
3085fb
2
LT3085
ELECTRICAL CHARACTERISTICS
PARAMETER
SET Pin Current
Output Offset Voltage (V
OUT
– V
SET
)
Load Regulation
Line Regulation
Minimum Load Current (Notes 3, 9)
V
CONTROL
Dropout Voltage (Note 4)
V
IN
Dropout Voltage (Note 4)
V
CONTROL
Pin Current (Note 5)
Current Limit (Note 9)
Error Amplifier RMS Output Noise (Note 6)
Ripple Rejection
CONDITIONS
I
SET
V
IN
= 1V, V
CONTROL
= 2V, I
LOAD
= 1mA, T
J
= 25°C
V
IN
≥ 1V, V
CONTROL
≥ 2V, 1mA ≤ I
LOAD
≤ 500mA (Note 9)
V
OS
V
IN
= 1V, V
CONTROL
= 2V, I
LOAD
= 1mA, T
J
= 25°C
V
IN
= 1V, V
CONTROL
= 2V, I
LOAD
= 1mA
ΔI
SET
ΔI
LOAD
= 1mA to 500mA
ΔV
OS
ΔI
LOAD
= 1mA to 500mA (Note 8)
ΔI
SET
ΔV
IN
= 1V to 36V,
ΔV
CONTROL
= 2V to 36V, I
LOAD
= 1mA
ΔV
OS
ΔV
IN
= 1V to 36V,
ΔV
CONTROL
= 2V to 36V, I
LOAD
= 1mA
V
IN
= V
CONTROL
= 10V
V
IN
= V
CONTROL
= 36V
I
LOAD
= 100mA
I
LOAD
= 500mA
I
LOAD
= 100mA
I
LOAD
= 500mA
I
LOAD
= 100mA
I
LOAD
= 500mA
V
IN
= 5V, V
CONTROL
= 5V, V
SET
= 0V, V
OUT
= –0.1V
,
I
LOAD
= 500mA, 10Hz ≤ f ≤ 100kHz, C
OUT
= 10μF C
SET
= 0.1μF
f = 120Hz, V
RIPPLE
= 0.5V
P-P
I
LOAD
= 0.1A, C
SET
= 0.1μF C
OUT
= 2.2μF
,
,
f=10kHz
f=1MHz
10ms Pulse
l
l
l
l
l
l
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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