E-, I-Grades ....................................... –40°C to 125°C
MP-Grade .......................................... –55°C to 150°C
H-Grade ............................................. –40°C to 150°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature: (Soldering, 10 sec)
MSOP Package Only ......................................... 300°C
PIN CONFIGURATION
TOP VIEW
TOP VIEW
IN
IN
SHDN
FAULT1
FAULT2
PWRGD
TEMP
I
MON
1
2
3
4
5
6
7
8
16
15
14
13
12
11
10
9
OUT
OUT
ADJ/SENSE**
GND/ADJ*
GND
REF/BYP
I
MAX
I
MIN
IN
IN
SHDN
FAULT1
FAULT2
PWRGD
TEMP
I
MON
1
2
3
4
5
6
7
8
17
GND
16 OUT
15 OUT
14 ADJ/SENSE**
13 GND/ADJ*
12 GND
11 REF/BYP
10 I
MAX
9 I
MIN
17
GND
MSE PACKAGE
16-LEAD PLASTIC MSOP
T
JMAX
= 125°C,
θ
JA
= 37°C/W,
θ
JC
= 5°C/W TO 10°C/W
T
JMAX
= 150°C FOR H-GRADE
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
*PIN 13 IS GND FOR LT3055; PIN 13 IS ADJ FOR LT3055-3.3 AND LT3055-5.
**PIN 14 IS ADJ FOR LT3055; PIN 14 IS SENSE FOR LT3055-3.3 AND LT3055-5.
DE PACKAGE
16-LEAD (4mm
×
3mm) PLASTIC DFN
T
JMAX
= 125°C,
θ
JA
= 38°C/W,
θ
JC
= 4.3°C/W
EXPOSED PAD (PIN 17) IS GND, MUST BE SOLDERED TO PCB
3055fa
2
For more information
www.linear.com/LT3055
LT3055 Series
ORDER INFORMATION
LEAD FREE FINISH
LT3055EMSE#PBF
LT3055IMSE#PBF
LT3055MPMSE#PBF
LT3055HMSE#PBF
LT3055EMSE-3.3#PBF
LT3055IMSE-3.3#PBF
LT3055MPMSE-3.3#PBF
LT3055HMSE-3.3#PBF
LT3055EMSE-5#PBF
LT3055IMSE-5#PBF
LT3055MPMSE-5#PBF
LT3055HMSE-5#PBF
LT3055EDE#PBF
LT3055IDE#PBF
LT3055EDE-3.3#PBF
LT3055IDE-3.3#PBF
LT3055EDE-5#PBF
LT3055IDE-5#PBF
TAPE AND REEL
LT3055EMSE#TRPBF
LT3055IMSE#TRPBF
LT3055MPMSE#TRPBF
LT3055HMSE#TRPBF
LT3055EMSE-3.3#TRPBF
LT3055IMSE-3.3#TRPBF
LT3055HMSE-3.3#TRPBF
LT3055EMSE-5#TRPBF
LT3055IMSE-5#TRPBF
LT3055MPMSE-5#TRPBF
LT3055HMSE-5#TRPBF
LT3055EDE#TRPBF
LT3055IDE#TRPBF
LT3055EDE-3.3#TRPBF
LT3055IDE-3.3#TRPBF
LT3055EDE-5#TRPBF
LT3055IDE-5#TRPBF
PART MARKING*
3055
3055
3055
3055
305533
305533
305533
30555
30555
30555
30555
3055
3055
05533
05533
30555
30555
PACKAGE DESCRIPTION
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead Plastic MSOP
16-Lead (4mm
×
3mm) Plastic DFN
16-Lead (4mm
×
3mm) Plastic DFN
16-Lead (4mm
×
3mm) Plastic DFN
16-Lead (4mm
×
3mm) Plastic DFN
16-Lead (4mm
×
3mm) Plastic DFN
16-Lead (4mm
×
3mm) Plastic DFN
TEMPERATURE RANGE
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°C
–40°C to 125°C
–40°C to 125°C
–55°C to 150°C
–40°C to 150°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
–40°C to 125°C
LT3055MPMSE-3.3#TRPBF 305533
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 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/
3055fa
For more information
www.linear.com/LT3055
3
LT3055 Series
ELECTRICAL CHARACTERISTICS
PARAMETER
Minimum Input Voltage (Note 3, 11)
Regulated Output Voltage (Note 4)
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
CONDITIONS
I
LOAD
= 500mA
LT3055-3.3: V
IN
= 3.9V, I
LOAD
= 1mA
3.9V < V
IN
< 45V, 1mA < I
LOAD
< 500mA
LT3055-5: V
IN
= 3.9V, I
LOAD
= 1mA
5.6V < V
IN
< 45V, 1mA < I
LOAD
< 500mA
ADJ Pin Voltage (Note 3, 4)
Line Regulation (Note 3)
LT3055: V
IN
= 2.2V, I
LOAD
= 1mA
2.2V < V
IN
< 45V, 10mA < I
LOAD
< 500mA
LT3055:
∆V
IN
= 2.2V to 45V, I
LOAD
= 1mA
LT3055-3.3:
∆V
IN
= 3.9V to 45V, I
LOAD
= 1mA
LT3055-5:
∆V
IN
= 5.6V to 45V, I
LOAD
= 1mA
LT3055: V
IN
= 2.2V, I
LOAD
= 1mA to 500mA
LT3055-3.3: V
IN
= 4.3V, I
LOAD
= 1mA to 500mA
LT3055-5: V
IN
= 6V, I
LOAD
= 1mA to 500mA
I
LOAD
= 10mA
l
l
l
l
l
l
l
l
l
l
l
MIN
3.267
3.234
4.95
4.9
594
588
TYP
1.8
3.3
3.3
5
5
600
0.25
1.4
2
0.5
3.5
5.25
140
200
MAX
2.2
3.333
3.336
5.05
5.1
606
612
3
19.5
30
4
22
33
175
260
250
370
275
410
400
590
130
200
550
4.5
25
1
60
UNITS
V
V
V
V
V
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
mV
μA
μA
μA
mA
mA
μA
nA
μV
RMS
μV
RMS
Load Regulation (Note 3)
Dropout Voltage, V
IN
= V
OUT(NOMINAL)
(Notes 5, 6)
I
LOAD
= 50mA
l
I
LOAD
= 100mA
l
225
350
l
l
l
l
l
l
I
LOAD
= 500mA
GND Pin Current, V
IN
= V
OUT(NOMINAL)
+ 0.6V
(Notes 6, 7)
I
LOAD
= 0mA
I
LOAD
= 1mA
I
LOAD
= 10mA
I
LOAD
= 100mA
I
LOAD
= 500mA
V
IN
= 45V, V
SHDN
= 0V
V
IN
= 12V
,
C
OUT
= 10µF I
LOAD
= 500mA, V
OUT
= 600mV,
BW = 10Hz to 100kHz
C
OUT
= 10µF C
BYP
= 10nF I
LOAD
= 500mA,
,
,
V
OUT
= 600mV, BW = 10Hz to 100kHz
Shutdown Threshold
SHDN
Pin Current (Note 13)
Ripple Rejection
V
OUT
= Off to On
V
OUT
= On to Off
V
SHDN
= 0V, V
IN
= 45V
V
SHDN
= 45V, V
IN
= 45V
V
IN
-V
OUT
= 2V, V
RIPPLE
= 0.5V
P-P
, f
RIPPLE
= 120Hz,
I
LOAD
= 500mA
LT3055, V
OUT
= 0.6V
LT3055-3.3
LT3055-5
V
IN
= –45V, V
OUT
= 0
V
OUT
= 1.2V, V
IN
= 0
V
IN
= 2.2V, V
OUT
= 0, V
IMAX
= 0
V
IN
= 2.2V,
∆V
OUT
= –5%
5.6V < V
IN
< 10V, V
OUT
= 5V, R
IMAX
= 1.5k,
FAULT2
Pin Threshold (I
FAULT
)
5.6V < V
IN
< 7V, V
OUT
= 5V, R
IMAX
= 604Ω,
FAULT2
Pin Threshold (I
FAULT
)
l
l
l
l
l
l
l
l
l
65
100
270
1.8
11
0.2
16
90
25
1.3
1.1
0.5
Quiescent Current in Shutdown
ADJ Pin Bias Current (Notes 3,12)
Output Voltage Noise
0.9
1.42
1
3
V
V
μA
µA
70
55
51
85
70
66
300
0
10
900
200
495
220
545
dB
dB
dB
μA
μA
mA
mA
mA
mA
Input Reverse Leakage Current
Reverse Output Current (Note 14)
Internal Current Limit (Note 3)
External Programmed Current Limit, V
OUT
= 5V
(Notes 6, 8)
520
180
445
3055fa
4
For more information
www.linear.com/LT3055
LT3055 Series
ELECTRICAL CHARACTERISTICS
PARAMETER
FAULT,
PWRGD Pins Logic Low Voltage
FAULT,
PWRGD Pins Leakage Current
I
MIN
Threshold Accuracy (Notes 6, 9)
PWRGD Trip Point
PWRGD Trip Point Hysteresis
The
l
denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. (Note 2)
CONDITIONS
Pull-Up Current = 50μA
V
FAULT1
, V
FAULT2
, V
PWRGD
= 5V
5.6V < V
IN
< 15V, V
OUT
= 5V, R
IMIN
= 1.2M
5.6V < V
IN
< 15V, V
OUT
= 5V, R
IMIN
= 120K
% of Nominal Output Voltage, Output Rising
% of Nominal Output Voltage
l
l
l
l
l
MIN
TYP
0.14
0.01
MAX
0.25
1
1.1
11
94
550
UNITS
V
μA
mA
mA
%
%
mA/mA
V
V
0.9
9
86
450
1
10
90
1
500
0.25
1.25
Current Monitor Ratio (Notes 6,10), Ratio = I
OUT
/I
MON
I
LOAD
= 10mA, 250mA, 500mA
TEMP Voltage (Note 16)
T
J
= 25°C
T
J
= 125°C
TEMP Error (Note 16)
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. Absolute maximum input-to-output differential
voltage is not achievable with all combinations of rated IN pin and OUT pin
voltages. With the IN pin at 50V, the OUT pin may not be pulled below 0V.
The total differential voltage from IN to OUT must not exceed +50V, –40V.
If OUT is pulled above GND and IN, the total differential voltage from OUT
to IN must not exceed 40V.
Note 2:
The LT3055 is tested and specified under pulse load conditions
such that T
J
~ T
A
. The LT3055E is 100% production tested at T
A
= 25°C
and performance is guaranteed from 0°C to 125°C. Performance at –40°C
and 125°C is assured by design, characterization and correlation with
statistical process controls. The LT3055I is guaranteed over the full –40°C
to 125°C operating junction temperature range. The LT3055MP is 100%
tested over the –55°C to 150°C operating junction temperature range. The
LT3055H is 100% tested at 150°C operating junction temperature.
Note 3:
The LT3055 adjustable version is tested and specified for these
conditions with ADJ pin connected to the OUT pin.
Note 4:
Maximum junction temperature limits operating conditions.
Regulated output voltage specifications do not apply for all possible
combinations of input voltage and output current. If operating at the
maximum input voltage, limit the output current range. If operating at
the maximum output current, limit the input voltage range. Current limit
foldback limits the maximum output current as a function of input-to-
output voltage. See Current Limit vs V
IN
-V
OUT
in the Typical Performance
Characteristics section.
Note 5:
Dropout voltage is the minimum differential IN-to-OUT voltage
needed to maintain regulation at a specified output current. In dropout,
the output voltage equals (V
IN
– V
DROPOUT
). For some output voltages,
minimum input voltage requirements limit dropout voltage.
Note 6:
To satisfy minimum input voltage requirements, the LT3055
adjustable version is tested and specified for these conditions with an
external resistor divider (60k bottom, 440k top) which sets V
OUT
to 5V. The
external resistor divider adds 10μA of DC load on the output. This external
current is not factored into GND pin current.
l
–0.08
0.08
V
Note 7:
GND pin current is tested with V
IN
= V
OUT(NOMINAL)
+ 0.6V and a
current source load. GND pin current increases in dropout. For the fixed
output voltage versions, an internal resistor divider adds about 10µA to
GND pin current. See GND pin current curves in the Typical Performance
Characteristics section.
Note 8:
Current limit varies inversely with the external resistor value tied
from the I
MAX
pin to GND. For detailed information on how to set the I
MAX
pin resistor value, please see the Operation section. If a programmed
current limit is not needed, tie the I
MAX
pin to GND and internal protection
circuitry implements short-circuit protection as specified.
Note 9:
The I
MIN
fault condition asserts if the output current falls below the
I
MIN
threshold defined by an external resistor from the I
MIN
pin to GND.
For detailed information on how to set the I
MIN
pin resistor value, please
see the Operation section. If the I
MIN
fault condition is not needed, the I
MIN
pin must be left floating (unconnected).
Note 10:
Current monitor ratio is tested with the I
MON
pin fixed at
V
OUT
– 0.5V and with the input range limited to V
OUT
+ 0.6V < V
IN
< V
OUT
+ 10V for I
OUT
= 10mA; V
OUT
+ 0.6V < V
IN
< V
OUT
+ 4V for I
OUT
= 250mA,
and V
OUT
+ 0.6V < V
IN
< V
OUT
+ 2V for I
OUT
= 500mA. Input voltage range
conditions are set to limit power dissipation in the IC to 1W maximum for
test purposes. The current monitor ratio varies slightly when in current
limit or when the I
MON
voltage exceeds V
OUT
– 0.5V. Please see the
Operation section for more information. If the current monitor function is
not needed, tie the IMON pin to GND.
Note 11:
To satisfy requirements for minimum input voltage, current limit
is tested at V
IN
= V
OUT(NOMINAL)
+ 1V or V
IN
= 2.2V, whichever is greater.
Note 12:
ADJ pin bias current flows out of the ADJ pin.
Note 13:
SHDN
pin current flows into the
SHDN
pin.
Note 14:
Reverse output current is tested with the IN pin grounded and the
OUT pin forced to the specified voltage. This current flows into the OUT
pin and out of the GND pin.
Note 15:
500mA of output current does not apply to the full range of input
voltage due to the internal current limit foldback.
Note 16:
The TEMP output voltage represents the average temperature of
the die while dissipating quiescent power. Due to the pass device power
dissipation and temperature gradients across the die, the TEMP output
voltage measurement does not guarantee that absolute maximum junction
