EXPOSED PAD (PIN 11) IS IN, MUST BE SOLDERED TO PCB
MSE PACKAGE
12-LEAD PLASTIC MSOP
T
JMAX
= 150°C,
θ
JA
= 33°C/W,
θ
JC
= 8°C/W
EXPOSED PAD (PIN 13) IS IN, MUST BE SOLDERED TO PCB
orDer inForMaTion
LEAD FREE FINISH
LT3090EDD#PBF
LT3090IDD#PBF
LT3090HDD#PBF
LT3090MPDD#PBF
LT3090EMSE#PBF
LT3090IMSE#PBF
LT3090HMSE#PBF
LT3090MPMSE#PBF
TAPE AND REEL
LT3090EDD#TRPBF
LT3090IDD#TRPBF
LT3090HDD#TRPBF
LT3090MPDD#TRPBF
LT3090EMSE#TRPBF
LT3090IMSE#TRPBF
LT3090HMSE#TRPBF
LT3090MPMSE#TRPBF
PART MARKING*
LGHJ
LGHJ
LGHJ
LGHJ
3090
3090
3090
3090
PACKAGE DESCRIPTION
10-Lead (3mm x 3mm) Plastic DFN
10-Lead (3mm x 3mm) Plastic DFN
10-Lead (3mm x 3mm) Plastic DFN
10-Lead (3mm x 3mm) Plastic DFN
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
12-Lead Plastic MSOP
TEMPERATURE RANGE
–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.
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
3090fa
For more information
www.linear.com/LT3090
LT3090
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER
Minimum IN Voltage
(Note 11)
SET Pin Current (I
SET
)
Output Offset Voltage V
OS
(V
OUT
– V
SET
)
CONDITIONS
I
LOAD
= 100mA
I
LOAD
= 600mA
V
IN
= –1.9V, I
LOAD
= 1mA,
–36V < V
IN
< –1.9V, 1mA < I
LOAD
< 600mA (Note 5)
V
IN
= –1.9V, I
LOAD
= 1mA,
–36V < V
IN
< –1.9V, 1mA < I
LOAD
< 600mA (Note 5)
l
l
l
elecTrical characTerisTics
MIN
–1.9
49.5
49
–1
–2
TYP
–1.5
–1.5
50
50
MAX
UNITS
V
V
50.5
51
1
2
µA
µA
mV
mV
nA/V
µV/V
Line Regulation: ΔI
SET
/ΔV
IN
V
IN
= –1.9V to –36V, I
LOAD
= 1mA
Line Regulation: ΔV
OS
/ΔV
IN
V
IN
= –1.9V to –36V, I
LOAD
= 1mA
Load Regulation: ΔI
SET
Load Regulation: ΔV
OS
I
LOAD
= 1mA to 600mA
I
LOAD
= 1mA to 600mA, V
IN
= –1.9V (Note 6)
l
1.5
2.5
0.5
1.2
2.5
nA
mV
Output Regulation with SET
Pin Voltage Change:
V
SET
= 0V to –32V, V
IN
= –36V, I
LOAD
= 1mA
ΔI
SET
/ΔV
SET
ΔV
OS
/ΔV
SET
V
SET
= 0V to –32V, V
IN
= –36V, I
LOAD
= 1mA
Dropout Voltage
V
IN
= V
OUT(NOMINAL)
(Note 7)
I
LOAD
= 1mA
I
LOAD
= 1mA
I
LOAD
= 100mA
I
LOAD
= 100mA
I
LOAD
= 600mA
I
LOAD
= 600mA
I
LOAD
= 10µA
I
LOAD
= 1mA
I
LOAD
= 100mA
I
LOAD
= 600mA
l
l
l
0.2
2.5
185
195
1
30
230
270
240
300
360
450
1.4
1.4
5
22.5
nA/V
µV/V
mV
mV
mV
mV
mV
mV
mA
mA
mA
mA
µV
RMS
nA
RMS
dB
dB
dB
l
300
l
l
l
l
l
GND Pin Current
V
IN
= V
OUT(NOMINAL)
(Note 8)
1
1.05
2.6
11.5
18
10
70
85
50
20
1.23
–1.27
180
190
21
–4.5
0.1
Error Amplifier RMS Output I
LOAD
= 600mA, BW = 10Hz to 100kHz, C
OUT
= 4.7µF, C
SET
= 0.1µF
Noise (Note 12)
Reference Current RMS
Output Noise (Note 12)
Ripple Rejection
V
IN
– V
OUT
= –1.5V (Avg)
SHDN
Pin Turn-ON
Threshold
SHDN
Pin Hysteresis
SHDN
Pin Current
(Note 10)
Quiescent Current in
Shutdown
Internal Current Limit
(Note 13)
BW = 10Hz to 100kHz
V
RIPPLE
= 500mV
P-P
, f
RIPPLE
= 120Hz, I
LOAD
= 100mA, C
OUT
= 4.7µF, C
SET
= 0.47µF
V
RIPPLE
= 50mV
P-P
, f
RIPPLE
= 10kHz, I
LOAD
= 600mA, C
OUT
= 4.7µF, C
SET
= 0.47µF
V
RIPPLE
= 50mV
P-P
, f
RIPPLE
= 1MHz, I
LOAD
= 600mA, C
OUT
= 4.7µF, C
SET
= 0.47µF
Positive
SHDN
Rising
Negative
SHDN
Rising (in Magnitude)
Positive
SHDN
Hysteresis
Negative
SHDN
Hysteresis
V
SHDN
= 0V
V
SHDN
= 15V
V
SHDN
= –15V
V
IN
= –6V, V
SHDN
= 0V
V
IN
= –6V, V
SHDN
= 0V
V
IN
= –1.9V, V
OUT
= 0V
V
IN
= –13V, V
OUT
= 0V
V
IN
= –36V, V
OUT
= 0V
V
IN
= –1.9V, ΔV
OUT
< 10mV
Programming Scale Factor: –36V < V
IN
< –1.9V, I
OUT
> 50mA (Note 14)
Max I
OUT
: V
IN
= –1.9V, R
ILIM
= 20k
Max I
OUT
: V
IN
= –1.9V, R
ILIM
= 100k
l
l
l
l
l
l
l
l
1.14
–1.36
1.32
–1.18
V
V
mV
mV
–7
±1
30
1
10
850
60
830
540
115
µA
µA
µA
µA
µA
mA
mA
mA
mA
A•kΩ
mA
mA
650
20
630
460
85
750
350
35
730
10
500
100
Programmable Current
Limit
3090fa
For more information
www.linear.com/LT3090
3
LT3090
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C.
PARAMETER
Positive Current Monitor
(Note 15)
Negative Current Monitor
CONDITIONS
Positive Current Monitoring (IMONP) Scale Factor
I
OUT
= 600mA, V
IN
= –2.5V, V
IMONN
= 2V, V
IMONP
= 0V
I
OUT
= 100mA, V
IN
= –2.5V, V
IMONN
= 2V, V
IMONP
= 0V
Negative Current Monitoring (IMONN) Scale Factor
I
OUT
= 600mA, V
IN
= –2.5V, V
IMONN
= 0V, V
IMONP
= –2.5V
I
OUT
= 100mA, V
IN
= –2.5V, V
IMONN
= 0V, V
IMONP
= –2.5V
–36V < V
IN
< –1.9V
10ms Pulse
l
l
l
l
l
elecTrical characTerisTics
MIN
280
42.5
560
85
10
TYP
0.5
300
50
1
600
100
MAX
320
57.5
640
115
UNITS
mA/A
µA
µA
mA/A
µA
µA
µA
Minimum Required Load
Current (Note 4)
Thermal Regulation ISET
0.04
%/W
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.
The LT3090 is tested and specified under pulsed load conditions
such that T
J
≅
T
A
. The LT3090E is guaranteed to meet performance
specifications from 0°C to 125°C junction temperature. Specifications over
the –40°C to 125°C operating temperature range are assured by design,
characterization, and correlation with statistical process controls. The
LT3090I is guaranteed over the full –40°C to 125°C operating junction
temperature range. The LT3090MP is 100% tested and guaranteed
over the full –55°C to 150°C operating junction temperature range. The
LT3090H is 100% tested at the 150°C operating junction temperature.
High junction temperatures degrade operating lifetimes. Operating lifetime
is derated at junction temperatures greater than 125°C.
Note 3.
Parasitic diodes exist internally between the OUT, SET, ILIM,
SHDN,
IMONP, IMONN, and GND pins and the IN pin. Do not drive OUT,
SET, ILIM,
SHDN,
IMONP, IMONN, and GND pins more than 0.3V below
the IN pin during fault conditions. These pins must remain at a voltage
more positive than IN during normal operation.
Note 4.
The LT3090 may go out of regulation if the minimum output
current requirement is not satisfied.
Note 5.
Maximum junction temperature limits operating conditions. The
regulated output voltage specification does not apply for all possible
combinations of input voltage and output current, primarily due to the
internal current limit foldback which decreases current limit at V
OUT
– V
IN
≥ 7V. If operating at maximum output current, limit the input voltage
range. If operating at maximum input voltage, limit the output current
range.
Note 6.
Load regulation is Kelvin sensed at the package.
Note 7.
Dropout voltage is the minimum output-to-input voltage
differential needed to maintain regulation at a specified output current. In
dropout, the output voltage is: V
IN
+ V
DROPOUT
.
Note 8.
GND pin current is tested with V
IN
= V
OUT(NOMINAL)
and a current
source load. Therefore, the device is tested while operating in dropout.
This is the worst-case GND pin current. GND pin current decreases at
higher input voltages.
Note 9.
The SET pin is clamped to OUT with diodes through 12k resistors.
These resistors and diodes only carry current under transient overloads or
fault conditions.
Note 10.
Positive
SHDN
pin current flows into the
SHDN
pin.
Note 11.
The
SHDN
threshold must be met to ensure device operation.
Note 12.
Output noise decreases by adding a capacitor across the voltage
setting resistor. Adding this capacitor bypasses the voltage setting
resistor’s thermal noise as well as the reference current’s noise. Output
noise then equals the error amplifier noise (see Applications Information
section).
Note 13.
The internal back-up current limit circuitry incorporates foldback
protection that decreases current limit for V
OUT
– V
IN
≥ 7V. Some level of
output current is provided at all V
OUT
– V
IN
differential voltages. Please
consult the Typical Performance Characteristic graph for current limit vs
V
OUT
– V
IN
.
Note 14.
The current limit programming scale factor is specified while
the internal backup current limit is not active. Please note that the internal
current limit has foldback protection for V
OUT
-to-V
IN
differentials greater
than 7V.
Note 15.
For positive current monitoring, bias IMONN to ≥ 2V above
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