E-, I-Grades ....................................... –40°C to 125°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec)
FE, R Packages Only ......................................... 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
OUT
OUT
OUT
OUT
I
LIM
SET
1
2
3
4
5
6
13
OUT
12 IN
11 IN
10 IN
9 IN
8 TEMP
7 I
MON
OUT
OUT
OUT
OUT
OUT
I
LIM
SET
OUT
1
2
3
4
5
6
7
8
17
OUT
16 OUT
15 IN
14 IN
13 IN
12 IN
11 TEMP
10 I
MON
9
OUT
TAB IS
OUT
FRONT VIEW
7
6
5
4
3
2
1
R PACKAGE
7-LEAD PLASTIC DD
T
JMAX
= 125°C,
θ
JA
= 34°C/W,
θ
JC
= 3°C/W
NC
IN
TEMP
OUT
I
MON
SET
I
LIM
DF PACKAGE
12-LEAD (4mm
×
4mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 41°C/W,
θ
JC
= 1.6°C/W
EXPOSED PAD (PIN 13) IS OUT, MUST BE SOLDERED TO PCB
FE PACKAGE
16-LEAD PLASTIC TSSOP
T
JMAX
= 125°C,
θ
JA
= 35°C/W,
θ
JC
= 2.3°C/W
EXPOSED PAD (PIN 17) IS OUT, MUST BE SOLDERED TO PCB
ORDER INFORMATION
LEAD FREE FINISH
LT3089EDF#PBF
LT3089IDF#PBF
LT3089EFE#PBF
LT3089IFE#PBF
LT3089ER#PBF
LT3089IR#PBF
TAPE AND REEL
LT3089EDF#TRPBF
LT3089IDF#TRPBF
LT3089EFE#TRPBF
LT3089IFE#TRPBF
LT3089ER#TRPBF
LT3089IR#TRPBF
PART MARKING*
3089
3089
3089FE
3089FE
LT3089R
LT3089R
PACKAGE DESCRIPTION
12-Lead (4mm × 4mm) Plastic DFN
12-Lead (4mm × 4mm) Plastic DFN
16-Lead Plastic TSSOP
16-Lead Plastic TSSOP
7-Lead Plastic DD-Pak
7-Lead Plastic DD-Pak
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°C to 125°C
–40°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/.
Some packages are available in 500 unit reels through
designated sales channels with #TRMPBF suffix.
2
3089f
For more information
www.linear.com/LT3089
LT3089
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)
Internal Current Limit
I
LIM
Programming Ratio
I
LIM
Minimum Output Current Resistance
I
MON
Full-Scale Output Current
I
MON
Scale Factor
I
MON
Operating Range
TEMP Output Current (Note 9)
TEMP Output Current Absolute Error (Note 9)
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
T
J
> 5°C
0°C <T
J
≤ 125°C
125°C <T
J
≤ 150°C
10Hz ≤ f ≤ 100kHz
I
LOAD
= 800mA, 10Hz ≤ f ≤ 100kHz, C
OUT
=10µF,
C
SET
= 0.1µF
f = 120Hz
f = 10kHz
f = 1MHz
10ms Pulse
75
–10
–15
5.7
27
90
75
20
0.003
I
LOAD
= 800mA
100mA ≤ I
LOAD
≤ 800mA
l
l
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
J
= 25°C. (Note 2)
CONDITIONS
I
SET
V
OS
V
IN
= 2V, I
LOAD
= 3mA
2V ≤ V
IN
≤ 36V, 3mA ≤ I
LOAD
≤ 800mA
V
IN
= 2V, I
LOAD
= 3mA
V
IN
= 2V, I
LOAD
= 3mA
∆I
LOAD
= 3mA to 800mA
∆I
LOAD
= 3mA to 800mA
∆I
SET
∆V
OS
DF, FE Packages
R Package
∆V
IN
= 2V to 36V, I
LOAD
= 3mA
∆V
IN
= 2V to 36V, I
LOAD
= 3mA
2V ≤ V
IN
≤ 36V
I
LOAD
= 100mA
I
LOAD
= 800mA
V
IN
= 5V, V
SET
= 0V, V
OUT
= –0.1V
l
l
l
l
l
l
l
l
MIN
49.5
48.75
–1.5
–3.5
TYP
50
50
0
0
–0.1
–0.5
–1.5
1.5
0.001
1.1
1.21
1.47
MAX
50.5
51.25
1.5
3.5
–3
–4
UNITS
µA
µA
mV
mV
nA
mV
mV
nA/V
mV/V
3
1.65
210
190
V
OUT
+ 0.4V
mA
V
V
A
mA/kΩ
Ω
µA
µA/A
V
µA/°C
µA
µA
nA
RMS
µV
RMS
dB
dB
dB
%/W
0.8
155
130
V
OUT
– 40V
1
175
300
160
200
1
10
15
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 LT3089 is tested and specified under pulse load conditions such
that T
J
≈ T
A
. The LT3089E is tested at T
A
= 25°C and performance is
guaranteed from 0°C to 125°C. Performance of the LT3089E over the
full –40°C and 125°C operating temperature range is assured by design,
characterization, and correlation with statistical process controls. The
LT3089I is guaranteed over the full –40°C to 125°C operating junction
temperature range. 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 LT3089, 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.
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
reliability.
Note 9:
The TEMP pin output current represents the average die junction
temperature. Due to power dissipation and thermal gradients across the
die, the TEMP pin output current measurement does not guarantee that
absolute maximum junction temperature is not exceeded.
京公网安备 11010802033920号
EEWORLD
