E-, I-Grades ....................................... –40°C to 125°C
H-Grade ............................................. –40°C to 150°C
MP-Grade .......................................... –55°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
M, ST Packages Only ........................................ 300°C
pin conFiguraTion
TOP VIEW
FRONT VIEW
OUT 1
OUT 2
OUT 3
SET 4
9
OUT
8
7
6
5
IN
IN
NC
NC
TAB IS
OUT
1
2
3
IN
OUT
SET
TAB IS
OUT
FRONT VIEW
3
2
1
M PACKAGE
3-LEAD PLASTIC DD-PAK
T
JMAX
= 150°C,
θ
JA
= 14°C/W,
θ
JC
= 3°C/W
IN
OUT
SET
DD PACKAGE
8-LEAD (3mm
×
3mm) PLASTIC DFN
T
JMAX
= 150°C,
θ
JA
= 28°C/W,
θ
JC
= 5.3°C/W
EXPOSED PAD (PIN 9) IS OUT, MUST BE SOLDERED TO PCB
ST PACKAGE
3-LEAD PLASTIC SOT-223
T
JMAX
= 150°C,
θ
JA
= 25°C/W,
θ
JC
= 15°C/W
orDer inForMaTion
LEAD FREE FINISH
LT3088EDD#PBF
LT3088IDD#PBF
LT3088HDD#PBF
LT3088EST#PBF
LT3088IST#PBF
LT3088HST#PBF
LT3088MPST#PBF
LT3088EM#PBF
LT3088IM#PBF
LT3088HM#PBF
LT3088MPM#PBF
TAPE AND REEL
LT3088EDD#TRPBF
LT3088IDD#TRPBF
LT3088HDD#TRPBF
LT3088EST#TRPBF
LT3088IST#TRPBF
LT3088HST#TRPBF
LT3088MPST#TRPBF
LT3088EM#TRPBF
LT3088IM#TRPBF
LT3088HM#TRPBF
LT3088MPM#TRPBF
PART MARKING*
LGSZ
LGSZ
LGSZ
3088
3088
3088
3088
LT3088M
LT3088M
LT3088M
LT3088M
PACKAGE DESCRIPTION
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
8-Lead (3mm
×
3mm) Plastic DFN
3-Lead Plastic SOT-223
3-Lead Plastic SOT-223
3-Lead Plastic SOT-223
3-Lead Plastic SOT-223
3-Lead Plastic DD-Pak
3-Lead Plastic DD-Pak
3-Lead Plastic DD-Pak
3-Lead Plastic DD-Pak
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°C
–40°C to 125°C
–40°C to 125°C
–40°C to 150°C
–55°C to 150°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 nonstandard 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/
2
3088f
For more information
www.linear.com/LT3088
LT3088
elecTrical characTerisTics
PARAMETER
SET Pin Current
Offset Voltage
(V
OUT
– V
SET
)
I
SET
Load Regulation
V
OS
Load Regulation
(Note 7)
Line Regulation
Minimum Load Current (Note 3)
Dropout Voltage (Note 4)
Current Limit
Reference Current RMS Output Noise (Note 5)
Error Amplifier RMS Output Noise (Note 5)
Ripple Rejection
V
RIPPLE
= 0.5V
P-P
, I
LOAD
= 0.1A, C
SET
= 0.1µF,
C
OUT
=10µF, V
IN
= V
OUT(NOMINAL)
+ 3V
Thermal Regulation, I
SET
∆I
LOAD
= 1mA to 800mA
∆I
SET
∆V
OS
I
SET
V
OS
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C. (Note 2)
CONDITIONS
V
IN
= 2V, I
LOAD
= 2mA
2V ≤ V
IN
≤ 36V, 2mA ≤ I
LOAD
≤ 800mA
V
IN
= 2V, I
LOAD
= 2mA
V
IN
= 2V, I
LOAD
= 2mA
∆I
LOAD
= 2mA to 800mA
DD Package
M, ST Packages
∆V
IN
= 2V to 36V, I
LOAD
= 2mA
∆V
IN
= 2V to 36V, I
LOAD
= 2mA
2V ≤ V
IN
≤ 36V
I
LOAD
= 100mA
I
LOAD
= 800mA
V
IN
= 5V, V
SET
= 0V, V
OUT
= –0.1V
10Hz ≤ f ≤ 100kHz
I
LOAD
= 800mA, 10Hz ≤ f ≤ 100kHz,
C
OUT
= 0µF, C
SET
= 0.1µF
f = 120Hz
f = 10kHz
f = 1MHz
10ms Pulse
75
l
l
l
l
l
l
l
MIN
49.5
49
–1.5
–3.5
TYP
50
50
0
0
–0.1
–0.5
–1.5
1.5
0.001
0.4
1.21
1.35
MAX
50.5
51
1.5
3.5
–3
–4
UNITS
µA
µA
mV
mV
nA
mV
mV
nA/V
mV/V
2
1.6
mA
V
V
A
nA
RMS
µV
RMS
dB
dB
dB
%/W
0.8
1.2
5.7
27
90
75
20
0.003
Note 1:
Stresses beyond those listed under Absolute Maximum Ratings
may cause permanent damage to the device. Exposure to any Absolute
Maximum Rating condition for extended periods may affect device
reliability and lifetime.
Note 2:
Unless otherwise specified, all voltages are with respect to V
OUT
.
The LT3088 is tested and specified under pulse load conditions such
that T
J
≈ T
A
. The LT3088E is tested at T
A
= 25°C and performance is
guaranteed from 0°C to 125°C. Performance of the LT3088E over the
full –40°C and 125°C operating temperature range is assured by design,
characterization, and correlation with statistical process controls. The
LT3088I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3088MP is 100% tested and guaranteed
over the –55°C to 150°C operating junction temperature range. The
LT3088H is tested at 150°C operating junction temperature. High junction
temperatures degrade operating lifetimes. Operating lifetime is degraded at
junction temperatures greater than 125°C.
Note 3:
Minimum load current is equivalent to the quiescent current of
the part. Since all quiescent and drive current is delivered to the output
of the part, the minimum load current is the minimum current required to
maintain regulation.
Note 4:
For the LT3088, dropout is specified as the minimum input-to-
output voltage differential required supplying a given output current.
Note 5:
Adding a small capacitor across the reference current resistor
lowers output noise. Adding this capacitor bypasses the resistor shot
noise and reference current noise; output noise is then equal to error
amplifier noise (see Applications Information section).
Note 6:
Diodes with series 400Ω resistors clamp the SET pin to the
OUT pin. These diodes and resistors only carry current under transient
overloads. During normal operation, keep the OUT-to-SET differential
voltage below 2V.
Note 7:
Load regulation is Kelvin sensed at the package.
Note 8:
This IC includes overtemperature protection that protects the
device during momentary overload conditions. Junction temperature
exceeds the maximum operating junction temperature when
overtemperature protection is active. Continuous operation above the
specified maximum operating junction temperature may impair device
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