The LT1085 voltage regulators are monolithic inte-
grated circuits designed for use in applications
requiring a well regulated positive output voltage
with low input-output differential voltage.
Note
1) –XX = Voltage Option: 3.3, 5 or 12
–XX = Left blank for Adjustable Option.
Features include full power usage of up to 3A load current, internal current limiting and thermal shutdown. Safe area
protection on the die is also included, providing protection of the series pass Darlington transistor under most conditions.
The hermetically sealed packages are utilised for high reliability and low thermal resistance, whilst the SMD1 package
is also designed for surface mount applications.
ABSOLUTE MAXIMUM RATINGS
(T
case
= 25°C unless otherwise stated)
V
IN
P
D
R
θJC
R
θJC
R
θJC
T
J
T
STG
T
LEAD
Input – Output Voltage Differential
Power Dissipation
Thermal Resistance Junction To Case
Thermal Resistance Junction To Case
Thermal Resistance Junction To Case
Operating Junction Temperature Range
Storage Temperature Range
Lead Temperature (for 10 sec.)
TO–3
TO–3
SMD1
SMD1
TO–257
TO–257
Control
Power
Control
Power
Control
Power
Control
Power
35V
Internally limited *
0.93°C / W
3.0°C / W
0.79°C / W
4.0°C / W
0.79°C / W
4.0°C / W
–55 to 150°C
–55 to 200°C
–65 to 150°C
300°C
* These ratings are only applicable for power dissipations of 28 Watts over a limited range of V
IN
– V
OUT
.
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is
believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in
its use. Semelab encourages customers to verify that datasheets are current before placing orders.
denotes specification is applicable over full operating temperature range.
Min. Typ. Max. Unit
3.270 3.300 3.333
V
♦
3.235 3.300 3.365
4.950 5.000 5.050
♦
4.900 5.000 5.100
11.88 12.00 12.12
♦
11.76 12.00 12.24
1.238 1.250 1.262
V
V
V
mV
mV
mV
Parameter
Output
Voltage Test Conditions
V
IN
= 5V, I
OUT
= 0, T
J
= 25°C (K Pack)
3.3V
4.8V
≤
V
IN
≤
15V, 0
≤
I
OUT
≤
I
MAXLOAD
5.0V
12V
V
IN
= 8V, I
OUT
= 0, T
J
= 25°C (K Pack)
6.5V
≤
V
IN
≤
20V, 0
≤
I
OUT
≤
I
MAXLOAD
V
IN
= 15V, I
OUT
= 0, T
J
= 25°C (K Pack)
13.5V
≤
V
IN
≤
25V, 0
≤
I
OUT
≤
I
MAXLOAD
(V
IN
- V
OUT
)= 3V, I
OUT
= 10mA, T
J
= 25°C
V
O
Output Voltage
3,4,6
V
REF
Reference Voltage
4
ADJ.
3.3V
5.0V
1.5V
≤
(V
IN
-
V
OUT
)
≤
25V, 10mA
≤
I
OUT
≤
I
MAXLOAD
♦
1.225 1.250 1.270
4.8V
≤
V
IN
≤
15V, I
OUT
= 0, T
J
= 25°C
0.5
6
4.8V
≤
V
IN
≤
15V, I
OUT
= 0
♦
1.0
6
6.5V
≤
V
IN
≤
20V, I
OUT
= 0, T
J
= 25°C
0.5
10
6.5V
≤
V
IN
≤
20V, I
OUT
= 0
13.5V
≤
V
IN
≤
25V, I
OUT
= 0, T
J
= 25°C
13.5V
≤
V
IN
≤
25V, I
OUT
= 0
1.5V
≤
(V
IN
-
V
OUT
)
≤
15V, I
LOAD
= 10mA, T
J
= 25°C
♦
♦
♦
♦
♦
♦
T
J
= 25°C
(V
IN
- V
OUT
) = 3V, 10mA
≤
I
OUT
≤
I
MAXLOAD
♦
♦
♦
♦
♦
ΔV
OUT
= 33mV,I
OUT
= I
MAXLOAD
ΔV
OUT
= 50mV,I
OUT
= I
MAXLOAD
ΔV
OUT
= 120mV,I
OUT
= I
MAXLOAD
ΔV
OUT
= 1%V ,I
OUT
= I
MAXLOAD
♦
1.0
1.0
2.0
0.015
0.035
0.050
3
7
5
10
12
24
0.1
0.2
1.3
1.3
1.3
1.3
10
25
25
0.2
0.2
0.5
15
20
20
35
36
72
0.3
0.4
1.5
1.5
1.5
1.5
REG
(LINE)
Line Regulation
2,3
12V
ADJ. 1.5V
≤
(V
IN
-
V
OUT
)
≤
15V, I
LOAD
= 10mA
15V
≤
(V
IN
-
V
OUT
)
≤
35V
3.3V
5.0V
REG
(LOAD)
Load Regulation
2,3,4
12V
V
IN
= 5V, 0
≤
I
OUT
≤
3A, T
J
= 25°C
V
IN
= 5V, 0
≤
I
OUT
≤
3A
V
IN
= 8V, 0
≤
I
OUT
≤
I
MAXLOAD,
T
J
= 25°C
V
IN
= 8V, 0
≤
I
OUT
≤
I
MAXLOAD
V
IN
= 15V, 0
≤
I
OUT
≤
I
MAXLOAD,
T
J
= 25°C
V
IN
= 15V, 0
≤
I
OUT
≤
I
MAXLOAD
(V
IN
- V
OUT
) = 3V,10mA
≤
I
OUT
≤
I
MAXLOAD
,
ADJ.
3.3V
V
D
Dropout Voltage
5
%
mV
mV
mV
%
5.0V
12V
ADJ
V
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is
believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in
its use. Semelab encourages customers to verify that datasheets are current before placing orders.
denotes specification is applicable over full operating temperature range.
Min. Typ. Max. Unit
3.270 3.300 3.333
V
♦
3.235 3.300 3.365
4.950 5.000 5.050
♦
4.900 5.000 5.100
11.88 12.00 12.12
♦
11.76 12.00 12.24
1.231 1.250 1.268
V
V
V
mV
mV
mV
Parameter
Output
Voltage Test Conditions
V
IN
= 5V, I
OUT
= 0, T
J
= 25°C (K Pack)
3.3V
4.8V
≤
V
IN
≤
15V, 0
≤
I
OUT
≤
I
MAXLOAD
5.0V
12V
V
IN
= 8V, I
OUT
= 0, T
J
= 25°C (K Pack)
6.5V
≤
V
IN
≤
20V, 0
≤
I
OUT
≤
I
MAXLOAD
V
IN
= 15V, I
OUT
= 0, T
J
= 25°C (K Pack)
13.5V
≤
V
IN
≤
25V, 0
≤
I
OUT
≤
I
MAXLOAD
(V
IN
- V
OUT
)= 3V, I
OUT
= 10mA, T
J
= 25°C
V
O
Output Voltage
3,4,6
V
REF
Reference Voltage
4
ADJ.
3.3V
5.0V
1.5V
≤
(V
IN
-
V
OUT
)
≤
25V, 10mA
≤
I
OUT
≤
I
MAXLOAD
♦
1.219 1.250 1.281
4.8V
≤
V
IN
≤
15V, I
OUT
= 0, T
J
= 25°C
0.5
6
4.8V
≤
V
IN
≤
15V, I
OUT
= 0
♦
1.0
6
6.5V
≤
V
IN
≤
20V, I
OUT
= 0, T
J
= 25°C
0.5
10
6.5V
≤
V
IN
≤
20V, I
OUT
= 0
13.5V
≤
V
IN
≤
25V, I
OUT
= 0, T
J
= 25°C
13.5V
≤
V
IN
≤
25V, I
OUT
= 0
1.5V
≤
(V
IN
-
V
OUT
)
≤
15V, I
LOAD
= 10mA, T
J
= 25°C
♦
♦
♦
♦
♦
♦
T
J
= 25°C
(V
IN
- V
OUT
) = 3V, 10mA
≤
I
OUT
≤
I
MAXLOAD
♦
♦
♦
♦
♦
ΔV
OUT
= 33mV,I
OUT
= I
MAXLOAD
ΔV
OUT
= 50mV,I
OUT
= I
MAXLOAD
ΔV
OUT
= 120mV,I
OUT
= I
MAXLOAD
ΔV
OUT
= 1%V ,I
OUT
= I
MAXLOAD
♦
1.0
1.0
2.0
0.015
0.035
0.050
3
7
5
10
12
24
0.7
0.8
1.3
1.3
1.3
1.3
10
25
25
0.2
0.2
0.5
15
20
20
35
36
72
1.25
1.65
1.5
1.5
1.5
1.5
REG
(LINE)
Line Regulation
2,3
12V
ADJ. 1.5V
≤
(V
IN
-
V
OUT
)
≤
15V, I
LOAD
= 10mA
15V
≤
(V
IN
-
V
OUT
)
≤
35V
3.3V
5.0V
REG
(LOAD)
Load Regulation
2,3,4
12V
V
IN
= 5V, 0
≤
I
OUT
≤
3A, T
J
= 25°C
V
IN
= 5V, 0
≤
I
OUT
≤
3A
V
IN
= 8V, 0
≤
I
OUT
≤
I
MAXLOAD,
T
J
= 25°C
V
IN
= 8V, 0
≤
I
OUT
≤
I
MAXLOAD
V
IN
= 15V, 0
≤
I
OUT
≤
I
MAXLOAD,
T
J
= 25°C
V
IN
= 15V, 0
≤
I
OUT
≤
I
MAXLOAD
(V
IN
- V
OUT
) = 3V,10mA
≤
I
OUT
≤
I
MAXLOAD
,
ADJ.
3.3V
V
D
Dropout Voltage
5
5.0V
12V
ADJ
%
mV
mV
mV
%
V
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is
believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in
its use. Semelab encourages customers to verify that datasheets are current before placing orders.
denotes specification is applicable over full operating temperature range.
Parameter
Output
Voltage Test Conditions
3.3V V
IN
= 8V
5.0V
V
IN
= 10V
V
IN
= 17V
(V
IN
-V
OUT
) = 5V
(V
IN
-V
OUT
) = 25V
V
IN
= 18V
V
IN
≤
20V
V
IN
≤
25V
Over Full Operating Temperature Range
ADJ.
ALL
3.3V
5.0V
1.5V
≤
(V
IN
-
V
OUT
)
≤
25V, 10mA
≤
I
OUT
≤
I
MAXLOAD
T
A
= 25°C, 30ms Pulse
V
IN
= 6.3V, f = 120Hz, C
OUT
=25μF, I
OUT
= 3A
V
IN
= 8V, f = 120Hz, C
OUT
=25μF, I
OUT
= 3A
V
IN
= 15V, f = 120Hz, C
OUT
=25μF, I
OUT
= 3A
(V
IN
-V
OUT
) = 3V, f = 120Hz, C
OUT
=25μF,
C
ADJ
=25μF, I
OUT
= IMAXLOAD ,
Over Full Operating Temperature Range
T
A
= 125°C, 1000 Hours
T
A
= 25°C, 10Hz
≤
f
≤
10kHz
12V
ADJ.
3.3V
Min.
♦
3.2
♦
♦
♦
♦
♦
♦
♦
♦
♦
♦
3.2
3.2
3.2
0.2
Typ.
4.0
4.0
4.0
4.0
0.5
5.0
5.0
5.0
5.0
Max.
Unit
I
L
Current Limit
A
10.0
10.0
10.0
10.0
120
μA
mA
I
Q
Quiescient/MinLoad
Current
Adjust Pin Current
Adjust Pin Current
Change
5.0V
12V
ADJ. (V
IN
-V
OUT
) = 25V
I
PIN
ΔI
PIN
0.2
5.0
Thermal Regulation
0.004 0.020 %/W
♦
♦
♦
♦
♦
60
60
54
60
72
68
60
75
0.5
0.3
0.003
1.0
%
%
%
dB
Ripple Rejection
4
12V
ADJ.
Temperature Stability
Long Term Stability
RMS Output Noise
(% of V
OUT
)
ALL
ALL
ALL
Note 1
: Absolute Maximum Rating area those values beyond which the
life of a device may be impaired.
Note 2
: See thermal regulation specifications for changes in output volt-
age due to heating effects. Load and line regulation are measured at a
constant junction temperature by low duty cycle pulse testing.
Note 3
: Line and load regulation are guaranteed up to the maximum
power dissipation of 30W. Power dissipation is determined by the
input/output differential and the output current. Guaranteed maximum
power dissipation will not be available over the full input/output range.
Note 4
: I
MAXLOAD
curve is defined as the minimum value of current limit
as a function of input to output voltage. Note that the 30W power dissipa-
tion for the LT1085 series is only achievable over a limited range of input
to output.voltage.
Note 5
: Dropout voltage is specified over the full output current range of
the device.
Note 6
: Full load current is not available at all input-output voltages. See
Notes 3, 4,
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is
believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in
its use. Semelab encourages customers to verify that datasheets are current before placing orders.
Semelab Plc reserves the right to change test conditions, parameter limits and package dimensions without notice. Information furnished by Semelab is
believed to be both accurate and reliable at the time of going to press. However Semelab assumes no responsibility for any errors or omissions discovered in
its use. Semelab encourages customers to verify that datasheets are current before placing orders.
This paper mainly analyzes the basic principle of automatic gain control (AGC) , then describes three implementation forms of the AGC loop , and finally simulates its performance based on the actual I...
[i=s]This post was last edited by btty038 on 2022-2-21 22:01[/i]This picture is like thisThen start building verificationData is so beautifulOptimize data...
I'm posting this late at night. I'm here before 2015. This may be the last post of 2015, so I'll post it as a commemoration. . . . . A few days ago, someone on the Internet asked me to increase the di...
As mentioned before, after the multimeter design reaches more than 4.5 digits, we enter a new world, just like we used to observe the world with our naked eyes, but now we use a magnifying glass or ev...
1) What are the advantages and disadvantages of the two circuit designs? Are the design circuits different because of the English paragraph on the DATASHEET (English translation: The default state of ...
The intelligent driving community has its own rhythm. Some are busy pushing new versions and focusing on R&D, others are busy with publicity and promotion, and still others are immersed in mass pro...[Details]
On August 23rd, Geely's subsidiary, Jiyao Tongxing, announced it has the industry's largest advanced production capacity for tandao
batteries
, with eight production bases across China. Jiy...[Details]
When you are happily watching NBA or football, your wife asks you to turn off the lights in the bedroom. Would you be depressed? Of course, unless you are not afraid of your wife.
Now you are ...[Details]
New energy vehicles are increasingly popular with consumers due to policies and energy conservation. Once you've purchased your vehicle, maintenance is essential. However, due to the different powe...[Details]
Ever since the Tesla fire incident, electric cars, already known for their poor reputation, have been subjected to even more scathing criticism. Despite this, many people are still willing to buy t...[Details]
New energy pure electric vehicles generally accelerate faster than comparable fuel-powered vehicles, both from a standing start and while accelerating. Many believe this is simply due to the motor'...[Details]
In June 2014, the Ministry of Industry and Information Technology issued 4G FD-LTE licenses to China Unicom and China Telecom. Together with the 4G TD-LTE licenses issued to China Mobile, China Uni...[Details]
The digital TV set-top box consists of a tuner, QAM demodulator, TS demultiplexer, MPEG-2 decoder, PAUNTSC video encoder, embedded CPU system and peripheral interfaces, CA module, and uplink data m...[Details]
introduction
The concept of the smart home is gradually developing and gaining market acceptance. We believe its ultimate form lies in the interconnection of all home appliances through open i...[Details]
Keysight Technologies is combining its electromagnetic simulator with Synopsys' AI-driven RF design migration flow to create an integrated design flow for migrating from TSMC's N6RF+ process techno...[Details]
Plessey Semiconductors has been acquired by Haylo Labs, which was established in March last year with a $100 million, five-year loan from Chinese technology company Goertek.
Haylo Labs w...[Details]
A tubular motor is an electric motor that is typically used to control the movement of machines and equipment. Tubular motors are generally divided into two categories: linear tubular motors and ro...[Details]
Methods of DC motor speed regulation:
1. The voltage regulator can be used to change the input voltage and speed directly, which is often used for large kilowatt-level motors.
2. Thyristo...[Details]
There are many motors that can use thyristor speed control, and they can be used in almost all industries. Various types of motors, such as fans, pumps, AC motors, DC motors, torque motors, single-...[Details]
A scale, a large, ground-mounted scale, is typically used to measure the tonnage of truck cargo. It's the primary weighing device used in factories, mines, and businesses for bulk cargo measurement...[Details]
Microchip MCU
京公网安备 11010802033920号
EEWORLD
