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.
Recently, I have been doing ESD testing of electronic products. From the test results of different products, I found that ESD is a very important test: if the circuit board is not designed well, when ...
Xiao Liu is really lucky. He recently found a girlfriend who is not only gentle and beautiful, but also clever and skillful. A few days ago, she knitted a beautiful cardigan for Xiao Liu. Xiao Liu w...
When you think of wireless technology, the first things that come to mind are Wi -Fi , Bluetooth, NFC, 4G and 5G. But did you know that a new wireless technology called Ultra-Wideband (UWB) is coming ...
The award certificates for TI's first low-power design competition have been produced and will be mailed to you today! (The first prize certificate has been mailed in advance) [size=4]Are you interest...
With the booming electronics industry, vision systems have become a leader in the electronics automation sector. However, the delicate nature of electronic products often affects product yields due...[Details]
If the ultimate form of a car is a silicon-based life form, then in
the field of
intelligent driving
, it has gradually taken on the appearance of a "veteran driver." In
the field of
the ...[Details]
To enable real-time monitoring of home security and automatically dial a number for voice prompts or send text messages when an alarm occurs, a GPRS-based embedded telephone alarm system was design...[Details]
On August 24th, media outlets reported, citing sources, that NavInfo, a listed company on the A-share market, is nearing completion in its acquisition of the intelligent driving c...[Details]
As the main model among new energy vehicles, pure electric vehicles have received strong support and encouragement from the country in recent years, and their development is changing with each pass...[Details]
On August 25th, SK Hynix announced that it has completed development and entered mass production of its 321-layer, 2Tb QLC NAND flash memory product. This achievement marks the world's first applic...[Details]
Zos Automotive Research Institute released the "2025
Smart Cockpit
Tier 1 Research Report (Domestic Edition)."
This report analyzes the operating conditions of more than a dozen ...[Details]
Recently, AstroBo Robot, a subsidiary of Chenxing Automation, launched a new mobile collaborative palletizing product. Leveraging an omnidirectional mobile chassis, an intelligent scheduling system...[Details]
Electric vehicles' 12V batteries don't rely on a generator to power them. Only gasoline-powered vehicles rely on the engine to drive a generator to generate electricity while driving, which is used...[Details]
The complexity of the integrated circuits (ICs) used in electronic systems in vehicles is increasing. They aim to execute artificial intelligence (AI) algorithms to control autonomous driving funct...[Details]
A multilevel inverter converts a DC signal into a multilevel staircase waveform. Instead of a straight positive-negative output waveform, the output waveform of a multilevel inverter alternates in ...[Details]
According to Nikkei, a survey found that global electric vehicle battery supply is expected to reach more than three times the required quantity due to
cooling
demand for electric vehicles,...[Details]
Tiantai Robot's official Weibo account announced on the evening of August 20 that Tiantai Robot Co., Ltd., together with strategic partners including Shandong Future Robot Technology Co., Ltd., Sha...[Details]
Lightweighting of automobiles is still a relatively unfamiliar term for automobiles. With the continuous improvement of environmental protection requirements, relevant regulations have also put for...[Details]
Nascent Micro is launching devices covering a wide range of power applications, including gallium nitride (GaN) drivers, dual-channel automotive drivers, and battery protection MOSFETs.
...[Details]
PCB Design
京公网安备 11010802033920号
EEWORLD
