LT1118-2.85_15 [Linear]

800mA, Source and Sink Regulators Adjustable and Fixed 2.5V, 2.85V, 5V Output;
LT1118-2.85_15
型号: LT1118-2.85_15
厂家: Linear    Linear
描述:

800mA, Source and Sink Regulators Adjustable and Fixed 2.5V, 2.85V, 5V Output

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LT1118/LT1118-2.5  
LT1118-2.85/LT1118-5  
Low I , Low Dropout,  
Q
800mA, Source and Sink  
Regulators Adjustable and  
Fixed 2.5V, 2.85V, 5V Output  
DESCRIPTION  
FEATURES  
The LT®1118 family of low dropout regulators has the  
unique capability of maintaining output regulation while  
sourcingorsinkingloadcurrent. The2.85Voutputvoltage  
regulator is ideal for use as a Boulay termination of up  
to 27 SCSI data lines. The regulator maintains regulation  
while both sourcing and sinking current, enabling the use  
of active negation drivers for improved noise immunity on  
the data lines. Regulation of output voltage is maintained  
for TERMPWR voltages as low as 4.0V. When unloaded,  
quiescentsupplycurrentisalow600μA,allowingcontinu-  
ous connection to the TERMPWR lines. An ultralow power  
shutdown mode is also available on the SO-8 version. In  
Shutdown the output is high impedance and supply cur-  
rent drops to less than 10μA.  
n
Regulates While Sourcing or Sinking Current  
n
Provides Termination for up to 27 SCSI Lines  
n
600μA Quiescent Current  
Ultralow Power Shutdown Mode  
n
n
Current Limit and Thermal Shutdown Protection  
n
Stable for Any C  
≥ 0.22μF  
LOAD  
n
n
Fast Settling Time  
1V Dropout Voltage  
APPLICATIONS  
n
Active Negation SCSI Terminations  
n
n
n
n
Computers  
Disk Drives  
CD-ROM  
Supply Splitter  
Current limits in both sourcing and sinking modes, plus  
on-chip thermal shutdown make the circuit tolerant of  
output fault conditions.  
L, LT, LTC and LTM are registered trademarks of Linear Technology Corporation.  
All other trademarks are the property of their respective owners.  
The LT1118 is available in 3-lead SOT-223 and 8-lead SO  
packages.  
TYPICAL APPLICATION  
Load Transient Response  
0.2V  
LT1118-2.85 OUT  
GND  
IN  
0V  
$V  
OUT  
–0.2V  
1μF  
CERAMIC  
5V  
2.2μF  
800mA  
I
LOAD  
I
LOAD  
1118 TA01  
0mA  
–400mA  
1118 TA02  
1118fd  
1
LT1118/LT1118-2.5/  
LT1118-2.85/LT1118-5  
(Note 1)  
ABSOLUTE MAXIMUM RATINGS  
Supply Voltage (V ) ................................................15V  
Operating Temperature Range...................... 0°C to 70°C  
Storage Temperature Range...................65°C to 150°C  
Lead Temperature (Soldering, 10 sec) .................. 300°C  
CC  
Input Voltage (Enable).................................0.2V to 7V  
Output Voltage ............................... 0.2V to V + 0.5V  
CC  
Short-Circuit Duration ..................................... Indefinite  
PIN CONFIGURATION  
TOP VIEW  
TOP VIEW  
FRONT VIEW  
3
2
1
IN  
IN  
OUT  
GND  
IN  
1
2
3
4
8
7
6
5
EN  
GND  
NC  
EN  
1
2
3
4
8
7
6
5
GND  
IN  
GND  
GND  
NC  
TAB IS  
GND  
GND  
OUT  
OUT  
IN  
FB  
S8 PACKAGE  
8-LEAD PLASTIC SO  
S8 PACKAGE  
8-LEAD PLASTIC SO  
ST PACKAGE  
3-LEAD PLASTIC SOT-223  
T
= 125°C, θ = 15°C/W  
T
= 125°C, θ = 15°C/W  
JA  
T
= 125°C, θ = 15°C/W  
JMAX  
JC  
JMAX  
JMAX  
JA  
ORDER INFORMATION  
LEAD FREE FINISH  
LT1118CS8#PBF  
LT1118CS8-2.5#PBF  
LT1118CS8-2.85#PBF  
LT1118CS8-5#PBF  
LT1118CST-2.5#PBF  
LT1118CST-2.85#PBF  
LT1118CST-5#PBF  
LEAD BASED FINISH  
LT1118CS8  
TAPE AND REEL  
PART MARKING  
1118  
PACKAGE DESCRIPTION  
8-Lead Plastic SO  
TEMPERATURE RANGE  
0°C to 70°C  
LT1118CS8#TRPBF  
LT1118CS8-2.5#TRPBF  
111825  
8-Lead Plastic SO  
0°C to 70°C  
LT1118CS8-2.85#TRPBF 111828  
8-Lead Plastic SO  
0°C to 70°C  
LT1118CS8-5#TRPBF  
LT1118CST-2.5#TRPBF  
11185  
8-Lead Plastic SO  
0°C to 70°C  
111825  
3-Lead Plastic SOT-223  
3-Lead Plastic SOT-223  
3-Lead Plastic SOT-223  
PACKAGE DESCRIPTION  
8-Lead Plastic SO  
0°C to 70°C  
LT1118CST-2.85#TRPBF 111828  
0°C to 70°C  
LT1118CST-5#TRPBF  
TAPE AND REEL  
11185  
0°C to 70°C  
PART MARKING*  
1118  
TEMPERATURE RANGE  
0°C to 70°C  
LT1118CS8#TR  
LT1118CS8-2.5  
LT1118CS8-2.5#TR  
LT1118CS8-2.85#TR  
LT1118CS8-5#TR  
LT1118CST-2.5#TR  
LT1118CST-2.85#TR  
LT1118CST-5#TR  
111825  
111828  
11185  
8-Lead Plastic SO  
0°C to 70°C  
LT1118CS8-2.85  
LT1118CS8-5  
8-Lead Plastic SO  
0°C to 70°C  
8-Lead Plastic SO  
0°C to 70°C  
LT1118CST-2.5  
111825  
111828  
11185  
3-Lead Plastic SOT-223  
3-Lead Plastic SOT-223  
3-Lead Plastic SOT-223  
0°C to 70°C  
LT1118CST-2.85  
LT1118CST-5  
0°C to 70°C  
0°C to 70°C  
Consult LTC Marketing for parts specified with wider operating temperature ranges.  
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/  
1118fd  
2
LT1118/LT1118-2.5  
LT1118-2.85/LT1118-5  
ELECTRICAL CHARACTERISTICS The l denotes the specifications which apply over the full operating  
temperature range, otherwise specifications are at TA = 25°C. (Note 2)  
PARAMETER  
Quiescent Current (V )  
CONDITIONS  
MIN  
TYP  
0.6  
1
MAX  
1
UNITS  
mA  
l
l
V
EN  
V
EN  
= 5V  
= 0V  
IN  
Quiescent Current in Shutdown (V )  
10  
μA  
IN  
l
l
Enable Input Thresholds  
Input Low Level  
Input High Level  
0.4  
–1  
1.4  
1.4  
V
V
2
l
l
l
l
l
Enable Input Current  
Feedback Voltage  
0V ≤ V ≤ 5V  
25  
μA  
EN  
No Load (25°C) (LT1118)  
All Operating Conditions (Note 3)  
1.213  
1.200  
1.225  
1.225  
1.237  
1.250  
V
V
Output Voltage  
No Load (25°C) (LT1118-2.5)  
All Operating Conditions (Note 3)  
2.47  
2.45  
2.5  
2.5  
2.53  
2.55  
V
V
No Load (25°C) (LT1118-2.85)  
All Operating Conditions (Note 3)  
2.82  
2.79  
2.85  
2.85  
2.88  
2.91  
V
V
No Load (25°C) (LT1118-5)  
All Operating Conditions (Note 3)  
4.95  
4.90  
5
5
5.05  
5.10  
V
V
l
l
l
l
Line Regulation (Note 4)  
Load Regulation (Note 4)  
I = 0mA, 4.2V ≤ V ≤ 15V (LT1118)  
6
6
mV  
mV  
mV  
mV  
L
IN  
I = 0mA, 4.2V ≤ V ≤ 15V (LT1118-2.5)  
L
IN  
I = 0mA, 4.75V ≤ V ≤ 15V (LT1118-2.85)  
6
L
IN  
I = 0mA, 6.5V ≤ V ≤ 15V (LT1118-5)  
10  
L
IN  
l
l
0mA ≤ I ≤ 800mA (LT1118)  
6
6
mV  
mV  
L
400mA ≤ I ≤ 0mA  
L
l
l
0mA ≤ I ≤ 800mA (LT1118-2.5)  
12  
12  
mV  
mV  
L
400mA ≤ I ≤ 0mA  
L
l
l
0mA ≤ I ≤ 800mA (LT1118-2.85)  
12  
12  
mV  
mV  
L
400mA ≤ I ≤ 0mA  
L
l
l
0mA ≤ I ≤ 800mA (LT1118-5)  
25  
25  
mV  
mV  
L
400mA ≤ I ≤ 0mA  
L
Dropout Voltage (Note 5)  
I = 100mA  
L
0.85  
1
1.1  
1.3  
V
V
L
I = 800mA  
FB Pin Bias Current  
Minimum Output Voltage  
Ripple Rejection  
LT1118  
LT1118  
0.35  
1
μA  
V
l
2.1  
f
= 120Hz, V – V = 2V  
OUT  
60  
80  
dB  
RIPPLE  
IN  
V
= 0.5V  
P-P  
RIPPLE  
Load Transient Settling Time,  
ΔV = 1%  
0mA ≤ I ≤ 800mA, C  
= 1μF  
LOAD  
5
5
μs  
μs  
L
–400mA ≤ I ≤ 0mA, C  
= 1μF  
LOAD  
L
Output Short-Circuit Current  
V
V
= 0V, Sourcing  
800  
1200  
–700  
mA  
mA  
OUT  
OUT  
= V , Sinking  
–400  
IN  
Thermal Shutdown Junction Temperature  
Enable Turn-On Delay  
No Load  
No Load  
170  
50  
°C  
μs  
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 3: All operating conditions include the combined effects of load  
current, input voltage and temperature over each parameter’s full range.  
Note 4: Load and line regulation are tested at a constant junction  
temperature by low duty cycle pulse testing.  
Note 2: Unless otherwide specified, testing done at V = 5V  
Note 5: Dropout voltage is defined as the minimum input to output voltage  
measured while sourcing the specified current.  
CC  
(LT1118-2.5, LT1118-2.85) or V = 7V (LT1118-5). V = V .  
CC  
EN  
CC  
Output C  
= 1μF, I  
= 0.  
LOAD  
LOAD  
1118fd  
3
LT1118/LT1118-2.5/  
LT1118-2.85/LT1118-5  
TYPICAL PERFORMANCE CHARACTERISTICS  
Dropout Voltage vs Output Current  
Ripple Rejection vs Frequency  
Ripple Rejection vs Frequency  
80  
60  
40  
20  
0
1.4  
1.2  
1
80  
60  
40  
20  
0
800mA  
400mA  
T
= 75°C  
J
T
= 25°C  
J
10mA  
10mA  
0.8  
0.6  
0.4  
0.2  
0
T
= 125°C  
J
NO LOAD  
NO LOAD  
SOURCING CURRENT  
SINKING CURRENT  
100  
10  
100  
1k  
10k  
100k  
10  
1k  
10k  
100k  
0
200  
400  
600  
800  
FREQUENCY (Hz)  
FREQUENCY (Hz)  
OUTPUT CURRENT (mA)  
1118 G02  
1118 G03  
1118 G01  
Output Impedance vs Frequency  
Feedback Current vs Temperature  
Ripple Rejection vs Load Current  
10  
1
450  
80  
60  
40  
20  
0
C
= C  
= 1μF  
LOAD  
IN  
400  
350  
300  
250  
200  
150  
100  
50  
NO CURRENT  
100mA SOURCE  
10mA SOURCE  
0.1  
0.01  
0.001  
100mA SINK  
10mA SINK  
0
2
3
4
5
6
–400 –200  
0
200  
400  
600  
800  
–55 –35 –15  
5
25 45 65 85 105 125  
10  
10  
10  
FREQUENCY (Hz)  
10  
10  
LOAD CURRENT (mA)  
TEMPERATURE (°C)  
1118 G04  
1118 G06  
1118 G05  
Input Current  
vs Output Sink Current  
Ground Pin Current  
vs Output Source Current  
2000  
1750  
1500  
1250  
1000  
750  
800  
700  
600  
500  
400  
300  
200  
100  
500  
250  
0
0
0
200 250  
0
50 100 150  
300 350 400  
400  
OUTPUT SOURCING CURRENT (mA)  
200  
600  
800  
OUTPUT SINK CURRENT (mA)  
1118 G07  
1118 G08  
1118fd  
4
LT1118/LT1118-2.5  
LT1118-2.85/LT1118-5  
PIN FUNCTIONS  
IN: Input Supply Pin. This pin should be decoupled with  
a 1μF or larger low ESR capacitor. The two IN pins on the  
SO-8 package must be directly connected on the printed  
circuit board to prevent voltage drops between the two  
inputs. When used as a SCSI active termination, IN con-  
nects to term power. When used as a supply splitter, IN is  
also the positive supply output.  
OUT: Regulated Output Voltage. Output can source or sink  
current. Current limit for sourcing and sinking current is  
provided to protect the device from fault conditons. The  
output must have a low ESR output filter capacitor. C  
OUT  
≥ 0.22μF to guarantee stability. A 0.1μF ceramic capacitor  
may be needed in parallel with C if the ESR of the main  
OUT  
C
is too high.  
OUT  
GND: Ground Pin. The multiple GND pins on the SO-8  
packageareinternallyconnected,butlowestloadregulation  
errors will result if these pins are tightly connected on the  
printed circuit board. This will also aid heat dissipation at  
high power levels.  
FB: Feedback Pin. The feedback pin is used to program  
the output voltage of the adjustable S8 part. The output  
voltage range that can be achieved is 2.1V to 6.5V. The  
output voltage is determined by the selection of feedback  
resistors defined by the following formula:  
EN: TTL/CMOS Logic Input. A high level allows normal  
V
= V (1 + R /R ) + I R  
OUT  
FB  
1
2
FB 1  
operation. A low level reduces supply current to zero. This  
pin is internally connected to V on 3-lead ST packaged  
IN  
LT1118 Adjustable  
devices.  
R
R
1
V
IN  
OUT  
V
OUT  
= V 1 +  
+ I  
R
FB 1  
IN  
FB  
(
)
2
1μF  
1μF  
LT1118  
GND  
R
R
1
2
EN  
FB  
1118 TA06  
OPERATION  
Output Capacitor  
Worst case transient response of the LT1118 regulators  
occursatzerooutputcurrent. Inordertoobtainthefastest  
transient settling performance, the regulator output may  
be preloaded with a small current. The preload current  
reduces the regulator output impedance, reducing output  
voltage settling time.  
The LT1118 family of voltage regulators require an output  
capacitor for stability. The regulators are stable with out-  
put capacitors larger than 0.2μF. Load transient response  
is very sensitive to output capacitor value and dielectric  
choice. Low ESR ceramic capacitors are the best choice  
for fast settling to load transients. Output capacitors  
between 0.2μF and 1μF give good performance in most  
applications. Larger tantalum output capacitors may be  
used to reduce load transient amplitudes. Larger capaci-  
tors should be paralleled with a 0.1μF ceramic capacitor  
to maintain quick settling time performance and to insure  
stability of the regulator control loop. Capacitors larger  
than 10μF may be safely used with the regulators, but  
little transient settling performance improvement results  
from their use.  
Thermal Considerations  
TheLT1118regulatorsarepackagedinplasticSOT-223and  
fused lead S8 packages. These small footprint packages  
are unable to convectively dissipate the heat generated  
when the regulator is operating at high current levels. In  
order to control die operating temperatures, the PC board  
layout should allow for maximum possible copper area at  
the ground pins of the LT1118. The ground pins and the  
tab on the SOT-223 package are electrically and thermally  
1118fd  
5
LT1118/LT1118-2.5/  
LT1118-2.85/LT1118-5  
OPERATION  
connected to the die substrate. Table 1 shows measured  
thermalresistancefromjunctiontoambientfortheLT1118  
connected to various sized PC board ground planes. The  
power dissipated in the LT1118 varies with input voltage  
and loading. When the regulator is sourcing current the  
power which must be dissipated by the package is:  
When the regulator is sinking load current, power dissipa-  
tion is nearly independent of V and can be calculated  
IN  
as:  
P = V  
• I  
D
OUT LOAD  
Heat sinking to the IC package must consider the worst  
case power dissipation which may occur.  
P = (V – V ) • I  
LOAD  
D
IN  
OUT  
Table 1. Measured Thermal Resistance from Junction to Ambient  
for the LT1118  
S8 Package  
SOT-223  
Free Air  
1 Sq Inch Copper  
120°C/W  
55°C/W  
95°C/W  
53°C/W  
4 Sq Inch Copper  
35°C/W  
38°C/W  
TYPICAL APPLICATIONS  
SCSI Active Terminator  
110Ω  
TERMPWR  
110Ω  
110Ω  
110Ω  
27 LINES  
LT1118-2.85 OUT  
GND  
IN  
110Ω  
+
5V  
2.2μF  
1μF  
1118 TA03  
Power Supply Splitter  
V
IN  
5V  
5V  
ANALOG  
COMMON  
2.5V  
LT1118-2.5 OUT  
GND  
IN  
1μF  
1μF  
1118 TA04  
1118fd  
6
LT1118/LT1118-2.5  
LT1118-2.85/LT1118-5  
PACKAGE DESCRIPTION  
ST Package  
3-Lead Plastic SOT-223  
(Reference LTC DWG # 05-08-1630)  
.248 – .264  
(6.30 – 6.71)  
.129 MAX  
.114 – .124  
(2.90 – 3.15)  
.059 MAX  
.264 – .287  
(6.70 – 7.30)  
.248 BSC  
.130 – .146  
(3.30 – 3.71)  
.039 MAX  
.059 MAX  
.090  
BSC  
.181 MAX  
RECOMMENDED SOLDER PAD LAYOUT  
.033 – .041  
(0.84 – 1.04)  
.0905  
(2.30)  
BSC  
10° – 16°  
.010 – .014  
10°  
MAX  
.071  
(1.80)  
MAX  
(0.25 – 0.36)  
10° – 16°  
.0008 – .0040  
(0.0203 – 0.1016)  
.024 – .033  
(0.60 – 0.84)  
.012  
(0.31)  
MIN  
.181  
(4.60)  
BSC  
ST3 (SOT-233) 0502  
S8 Package  
8-Lead Plastic Small Outline (Narrow 0.150)  
(Reference LTC DWG # 05-08-1610)  
.189 – .197  
(4.801 – 5.004)  
NOTE 3  
.045 .005  
.050 BSC  
7
5
8
6
.245  
MIN  
.160 .005  
.150 – .157  
(3.810 – 3.988)  
NOTE 3  
.228 – .244  
(5.791 – 6.197)  
.030 .005  
TYP  
1
3
4
2
RECOMMENDED SOLDER PAD LAYOUT  
.010 – .020  
(0.254 – 0.508)  
× 45°  
.053 – .069  
(1.346 – 1.752)  
.004 – .010  
(0.101 – 0.254)  
.008 – .010  
(0.203 – 0.254)  
0°– 8° TYP  
.016 – .050  
(0.406 – 1.270)  
.050  
(1.270)  
BSC  
.014 – .019  
(0.355 – 0.483)  
TYP  
NOTE:  
INCHES  
1. DIMENSIONS IN  
(MILLIMETERS)  
2. DRAWING NOT TO SCALE  
3. THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR PROTRUSIONS.  
MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm)  
SO8 0303  
1118fd  
Information furnished by Linear Technology Corporation is believed to be accurate and reliable.  
However, no responsibility is assumed for its use. Linear Technology Corporation makes no representa-  
tion that the interconnection of its circuits as described herein will not infringe on existing patent rights.  
7
LT1118/LT1118-2.5/  
LT1118-2.85/LT1118-5  
TYPICAL APPLICATION  
Variable 2.1V to 6.5V Regulator with DIgital Control  
12V  
0.1μF  
IN  
OUT  
FB  
V
OUT  
1μF  
0.22μF  
R
1
LT1118  
GND  
V
D
IN  
CC  
13.3k  
R
2
6.19k  
V
DAC  
μP  
V
LTC1257  
GND  
CLK  
LOAD  
EN  
OUT  
R
3
V
REF  
6.19k  
1118 TA05  
R
1
R
1
V
OUT  
= 1.225 1 +  
– V  
DAC  
R
|| R  
R
2
2
3
)
(
RELATED PARTS  
PART NUMBER DESCRIPTION  
COMMENTS  
V : 4.2V to 30V, V  
LT1129  
700mA, Micropower, LDO  
= 3.8V, V = 0.40V, I = 50μA, I = 16μA;  
OUT(MIN) DO Q SD  
IN  
DD, SOT-223, S8, TO220-5 and TSSOP20 Packages  
LT1206  
LT1210  
LT1763  
250mA/60MHz Current Feedback Amplifier High Output Current Drive Capability, Can Sink/Source  
1.1A, 35MHz Current Feedback Amplifer  
500mA, Low Noise Micropower, LDO  
High Output Current Drive Capability, Can Sink/Source  
V : 1.8V to 20V, V = 1.22V, V = 0.30V, I = 30μA, I = < 1μA,  
IN  
OUT(MIN)  
DO  
Q
SD  
Low Noise < 20μV  
, S8 Package  
RMS  
LT1764/  
LT1764A  
3A, Low Noise, Fast Transient Response,  
LDO  
V : 2.7V to 20V, V  
= 1.21V, V = 0.34V, I = 1mA, I = < 1μA, Low Noise  
OUT(MIN) DO Q SD  
IN  
< 40μV  
, “A” Version Stable with Ceramic Capacitors, DD and TO220-5 Packages  
RMS  
LTC1844  
150mA, Very Low Drop-Out LDO  
V : 1.6V to 6.5V, V  
= 1.25V, V = 0.08V, I = 35μA, I = < 1μA,  
IN  
OUT(MIN) DO Q SD  
Low Noise < 60μV  
, ThinSOT™ Package  
RMS  
LT1962  
300mA, Low Noise Micropower, LDO  
V : 1.8V to 20V, V  
= 1.22V, V = 0.27V, I = 30μA, I = < 1μA,  
OUT(MIN) DO Q SD  
IN  
Low Noise < 20μV  
, MS8 Package  
RMS  
LT1963/  
LT1963A  
1.5A, Low Noise, Fast Transient Response, V : 2.1V to 20V, V  
= 1.21V, V = 0.34V, I = 1mA, I = < 1μA,  
OUT(MIN) DO Q SD  
IN  
LDO  
Low Noise < 40μV  
, “A” Version Stable with Ceramic Capacitors;  
RMS  
DD, TO220-5, SOT-223 and S8 Packages  
LT3021  
LT3024  
LT3028  
500mA, Low Voltage V , V  
= 0.9V, V : 0.9V to 10V, V  
= 0.20V, V = 0.16V, I = 120μA, I = 3μA, DFN and  
DO Q SD  
DO IN(MIN)  
IN  
OUT(MIN)  
OUT(MIN)  
OUT(MIN)  
LDO  
S8 Packages  
Dual, 100mA/500mA, Low Noise  
Micropower, LDO  
V : 1.8V to 20V, V  
= 1.22V, V = 0.30V, I = 60μA, I = < 1μA, DFN and  
DO Q SD  
IN  
TSSOP Packages  
Dual, 100mA/500mA, Low Noise  
Micropower, LDO with Independent Inputs Low Noise < 20μV  
V : 1.8V to 20V, V  
= 1.22V, V = 0.30V, I = 30μA, I = < 1μA,  
DO Q SD  
, DFN and TSSOP Packages  
IN  
RMS  
LT3080/  
LT3080-1  
1.1A Parallelable, Low Noise, Low Dropout 300mV Dropout Voltage (2-Supply Operation), Low Noise: 40μV  
, V : 1.2V to 36V, V  
:
RMS IN  
OUT  
Linear Regulator  
0V to 35.7V, Current-Based Reference with 1-Resistor V  
Set; Directly Parallelable (No Op  
OUT  
Amp Required), Stable with Ceramic Caps, TO-220, SOT-223, MSOP and 3mm × 3mm DFN  
Packages; LT3080-1 Version Has Integrated Internal Ballast Resistor  
LT3085  
500mA, Parallelable Low Noise Low  
Dropout Linear Regulator  
275mV Dropout Voltage (2 Supply Operation), Low Noise: 40μV  
OUT  
, V : 1.2V to 36V,  
RMS IN  
V
: 0V to 35.7V, Current Reference, MSOP-8 and 2mm × 3mm DFN-6 Packages  
ThinSOT is a trademark of Linear Technology Corporation  
1118fd  
LT 0209 REV D • PRINTED IN USA  
LinearTechnology Corporation  
1630 McCarthy Blvd., Milpitas, CA 95035-7417  
8
© LINEAR TECHNOLOGY CORPORATION 1995  
(408) 432-1900 FAX: (408) 434-0507 www.linear.com  

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