ChipFind - документация

Электронный компонент: LT1086CM-3.6

Скачать:  PDF   ZIP
1
LT1086 Series
s
3-Terminal Adjustable or Fixed
2.85V, 3.3V, 3.6V, 5V, 12V
s
Output Current of 1.5A, (0.5A for LT1086H)
s
Operates Down to 1V Dropout
s
Guaranteed Dropout Voltage at Multiple Current Levels
s
Line Regulation: 0.015%
s
Load Regulation: 0.1%
s
100% Thermal Limit Functional Test
The LT
1086 is designed to provide 1.5A with higher
efficiency than currently available devices. All internal
circuitry is designed to operate down to 1V input-to-
output differential and the dropout voltage is fully speci-
fied as a function of load current. Dropout is guaranteed at
a maximum of 1.5V at maximum output current, decreas-
ing at lower load currents. On-chip trimming adjusts the
reference/ouput voltage to 1%. Current limit is also
trimmed, minimizing the stress on both the regulator and
power source circuitry under overload conditions.
The LT1086 is pin compatible with older 3-terminal adjust-
able regulators. A 10
F output capacitor is required on
these new devices; however, this is usually included in
most regulator designs.
A 2.85V output version is offered for SCSI-2 active termi-
nation. For surface mount applications see the LT1117-
2.85 data sheet. For high current or lower dropout require-
ments see the LT1123-2.85 data sheet.
Unlike PNP regulators, where up to 10% of the output
current is wasted as quiescent current, the LT1086 quies-
cent current flows into the load, increasing efficiency.
1.5A Low Dropout Positive
Regulators Adjustable and
Fixed 2.85V, 3.3V, 3.6V, 5V, 12V
FEATURES
DESCRIPTIO
N
U
s
SCSI-2 Active Terminator
s
High Efficiency Linear Regulators
s
Post Regulators for Switching Supplies
s
Constant Current Regulators
s
Battery Chargers
s
Microprocessor Supply
APPLICATIO
N
S
U
LT1086 Dropout Voltage
OUTPUT CURRENT (A)
0
0
MINIMUM INPUT/OUTPUT DIFFERENTIAL (V)
1
2
0.5
1
LT1086 TA02
1.5
INDICATES GUARANTEED TEST POINT
55C
T
J
150C
0C
T
J
125C
T
J
= 55C
T
J
= 25C
T
J
= 150C
TYPICAL APPLICATIO
N
U
V
IN
4.75V
3.3V AT 1.5A
*MAY BE OMITTED IF INPUT SUPPLY IS WELL
BYPASSED WITHIN 2" OF THE LT1086
LT1086-3.3
LT1086 TA01
10
F*
TANTALUM
10
F
TANTALUM
IN
OUT
GND
5V to 3.3V Regulator
, LTC and LT are registered trademarks of Linear Technology Corporation.
2
LT1086 Series
PRECO
N
DITIO
N
I
N
G
U
U
U
Power Dissipation ............................... Internally Limited
Input Voltage (Note 1) ............................................. 30V
Operating Input Voltage
Adjustable Devices ........................................... 25V
2.85V Devices .................................................. 18V
3.3V, 3.6V, and 5V Devices ............................... 20V
12V Devices ...................................................... 25V
Operating Junction Temperature Range
"C" Grades
Control Section ............................... 0
C to 125
C
Power Transistor ............................. 0
C to 150
C
"I" Grades
Control Section .......................... 40
C to 125
C
Power Transistor ........................ 40
C to 150
C
"M" Grades
Control Section .......................... 55
C to 150
C
Power Transistor ........................ 55
C to 200
C
Storage Temperature Range ................. 65
C to 150
C
Lead Temperature (Soldering, 10 sec) .................. 300
C
ABSOLUTE
M
AXI
M
U
M
RATINGS
W
W
W
U
100% Thermal Shutdown Functional Test.
Note 1: Although the device's maximum operating voltage is limited, (18V
for a 2.85V device, 20V for a 5V device, and 25V for adjustable and
12V devices) the devices are guaranteed to withstand transient input
voltages up to 30V. For input voltages greater than the maximum operating
input voltage some degradation of specifications will occur. For fixed
voltage devices operating at input/output voltage differentials greater than
15V, a minimum external load of 5mA is required to maintain regulation.
PACKAGE/ORDER I
N
FOR
M
ATIO
N
W
U
U
LT1086CM
LT1086CM-3.3
LT1086CM-3.6
LT1086IM
LT1086IM-3.3
LT1086IM-3.6
ORDER
PART NUMBER
ORDER
PART NUMBER
LT1086CH
LT1086MH
ORDER
PART NUMBER
ORDER
PART NUMBER
LT1086CK
LT1086CK-5
LT1086CK-12
LT1086IK
LT1086IK-5
LT1086IK-12
LT1086MK
LT1086MK-5
LT1086MK-12
JA
= 150
C/W
2
1
V
IN
CASE
IS OUTPUT
ADJ (GND)*
K PACKAGE
2-LEAD TO-3 METAL CAN
BOTTOM VIEW
JA
= 35
C/W
** WITH PACKAGE SOLDERED TO 0.5IN
2
COPPER AREA
OVER BACKSIDE GROUND PLANE OR INTERNAL POWER
PLANE.
JA
CAN VARY FROM 20
C/W TO > 40
C/W
DEPENDING ON MOUNTING TECHNIQUE.
V
IN
V
OUT
ADJ
(GND)*
M PACKAGE
3-LEAD PLASTIC DD
FRONT VIEW
TAB IS
OUTPUT
3
2
1
T PACKAGE
3-LEAD PLASTIC TO-220
FRONT VIEW
TAB IS
OUTPUT
3
2
1
V
IN
V
OUT
ADJ
(GND)*
JA
= 50
C/W
LT1086CT
LT1086CT-2.85
LT1086CT-3.3
LT1086IT
LT1086IT-5
LT1086IT-12
LT1086CT-3.6
LT1086CT-5
LT1086CT-12
JA
= 30
C/W**
*For fixed versions.
BOTTOM VIEW
V
IN
V
OUT
(CASE)
ADJ
1
3
2
H PACKAGE
3-LEAD TO-39 METAL CAN
3
LT1086 Series
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Reference Voltage
LT1086, LT1086H
I
OUT
= 10mA, T
J
= 25
C, (V
IN
V
OUT
) = 3V
1.238
1.250
1.262
V
(Note 2)
10mA
I
OUT
1.5A, (0.5A for LT1086H), 1.5V
(V
IN
V
OUT
)
15V
q
1.225
1.250
1.270
V
Output Voltage
LT1086-2.85
I
OUT
= 0mA, T
J
= 25
C, V
IN
= 5V
2.82
2.85
2.88
V
(Note 2)
0V
I
OUT
1.5A, 4.35V
V
IN
18V
q
2.79
2.85
2.91
V
LT1086-3.3
V
IN
= 5V, I
OUT
= 0mA, T
J
= 25
C
3.267
3.300
3.333
V
4.75V
V
IN
18V, 0V
I
OUT
1.5A
q
3.235
3.300
3.365
V
LT1086-3.6
V
IN
= 5V, I
OUT
= 0mA, T
J
= 25
C
3.564
3.600
3.636
V
5V
V
IN
18V, 0
I
OUT
1.5A
q
3.500
3.672
V
4.75V
V
IN
18V, 0
I
OUT
1A, T
J
0
C
3.500
3.672
V
V
IN
= 4.75V, I
OUT
= 1.5A, T
J
0
C
3.300
3.672
V
LT1086-5
I
OUT
= 0mA, T
J
= 25
C, V
IN
= 8V
4.950
5.000
5.050
V
0
I
OUT
1.5A, 6.5V
V
IN
20V
q
4.900
5.000
5.100
V
LT1086-12
I
OUT
= 0mA, T
J
= 25
C, V
IN
= 15V
11.880 12.000 12.120
V
0
I
OUT
1.5A, 13.5V
V
IN
25V
q
11.760 12.000 12.240
V
Line Regulation
LT1086, LT1086H
I
LOAD
= 10mA, 1.5V
(V
IN
V
OUT
)
15V, T
J
= 25
C
0.015
0.2
%
q
0.035
0.2
%
LT1086-2.85
I
OUT
= 0mA, T
J
= 25
C, 4.35V
V
IN
18V
0.3
6
mV
q
0.6
6
mV
LT1086-3.3
4.5V
V
IN
18V, I
OUT
= 0mA, T
J
= 25
C
0.5
10
mV
q
1.0
10
mV
LT1086-3.6
4.75V
V
IN
18V, I
OUT
= 0mA, T
J
= 25
C
0.5
10
mV
q
1.0
10
mV
LT1086-5
I
OUT
= 0mA, T
J
= 25
C, 6.5V
V
IN
20V
0.5
10
mV
q
1.0
10
mV
LT1086-12
I
OUT
= 0mA, T
J
= 25
C, 13.5V
V
IN
25V
1.0
25
mV
q
2.0
25
mV
Load Regulation
LT1086, LT1086H
(V
IN
V
OUT
) = 3V, 10mA
I
OUT
1.5A, (0.5A for LT1086H)
T
J
= 25
C (Notes 1, 2)
0.1
0.3
%
q
0.2
0.4
%
LT1086-2.85
V
IN
= 5V, 0
I
OUT
1.5A, T
J
= 25
C (Notes 1, 2)
3
12
mV
q
6
20
mV
LT1086-3.3
V
IN
= 5V, 0
I
OUT
1.5A, T
J
= 25
C (Notes 1, 2)
3
15
mV
q
7
25
mV
LT1086-3.6
V
IN
= 5.25V, 0
I
OUT
1.5A, T
J
= 25
C (Notes 1, 2)
3
15
mV
q
6
25
mV
V
IN
= 5V, 0
I
OUT
1A, T
J
= 25
C
2
15
mV
q
4
25
mV
LT1086-5
V
IN
= 8V, 0
I
OUT
1.5A,
T
J
= 25
C (Notes 1, 2)
5
20
mV
q
10
35
mV
LT1086-12
V
IN
= 15V, 0
I
OUT
1.5A,
T
J
= 25
C (Notes 1, 2)
12
36
mV
q
24
72
mV
Dropout Voltage
LT1086/-2.85/-3.3/-3.6/-5/-12
V
OUT
,
V
REF
= 1%, I
OUT
= 1.5A (Note 3)
q
1.3
1.5
V
(V
IN
V
OUT
)
LT1086H
V
REF
= 1%, I
OUT
= 0.5A (Note 3)
q
0.95
1.25
V
ELECTRICAL CHARACTERISTICS
4
LT1086 Series
PARAMETER
CONDITIONS
MIN
TYP
MAX
UNITS
Current Limit
LT1086/-2.85/-3.3/-3.6/-5/-12 (V
IN
V
OUT
) = 5V
q
1.50
2.00
A
(V
IN
V
OUT
) = 25V
q
0.05
0.15
A
LT1086H
(V
IN
V
OUT
) = 5V
q
0.50
0.700
A
(V
IN
V
OUT
) = 25V
q
0.02
0.075
A
Minimum Load Current
LT1086/LT1086H
(V
IN
V
OUT
) = 25V (Note 4)
q
5
10
mA
Quiescient Current
LT1086-2.85
V
IN
18V
q
5
10
mA
LT1086-3.3
V
IN
18V
q
5
10
mA
LT1086-3.6
V
IN
18V
q
5
10
mA
LT1086-5
V
IN
20V
q
5
10
mA
LT1086-12
V
IN
25V
q
5
10
mA
Thermal Regulation
T
A
= 25
C, 30ms pulse
0.008
0.04
%/W
Ripple Rejection
f = 120Hz, C
OUT
= 25
F Tantalum, I
OUT
= 1.5A, (I
OUT
= 0.5A for LT1086H)
LT1086, LT1086H
C
ADJ
= 25
F, (V
IN
V
OUT
) = 3V
q
60
75
dB
LT1086-2.85
V
IN
= 6V
q
60
72
dB
LT1086-3.3
V
IN
= 6.3V
q
60
72
dB
LT1086-3.6
V
IN
= 6.6V
q
60
72
dB
LT1086-5
V
IN
= 8V
q
60
68
dB
LT1083-12
V
IN
= 15V
q
54
60
dB
Adjust Pin Current
LT1086, LT1086H
T
J
= 25
C
55
A
q
120
A
Adjust Pin Current
LT1086, LT1086H
10mA
I
OUT
1.5A, (0.5A for LT1086H)
Change
1.5V
(V
IN
V
OUT
)
15V
q
0.2
5
A
Temperature Stability
q
0.5
%
Long Term Stability
T
A
= 125
C, 1000 Hrs.
0.3
1
%
RMS Output Noise
T
A
= 25
C, 10Hz =
f
10kHz
0.003
%
(% of V
OUT
)
Thermal Resistance
H Package: Control Circuitry/Power Transistor
15/20
C/W
Junction-to-Case
K Package: Control Circuitry/Power Transistor
1.7/4.0
C/W
M Package: Control Circuitry/Power Transistor
1.5/4.0
C/W
T Package: Control Circuitry/Power Transistor
1.5/4.0
C/W
The
q
denotes the specifications which apply over the full operating
temperature range.
Note 1: See thermal regulation specifications for changes in output voltage
due to heating effects. Line and load regulation are measured at a constant
junction temperature by low duty cycle pulse testing. Load regulation is
measured at the output lead
1/8" from the package.
Note 2: Line and load regulation are guaranteed up to the maximum power
dissipation of 15W (3W for the LT1086H). 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. See Short-Circuit Current curve for available output current.
Note 3: Dropout voltage is specified over the full output current range of
the device. Test points and limits are shown on the Dropout Voltage curve.
Note 4: Minimum load current is defined as the minimum output current
required to maintain regulation. At 25V input/output differential the device
is guaranteed to regulate if the output current is greater than 10mA.
ELECTRICAL CHARACTERISTICS
5
LT1086 Series
TYPICAL PERFOR
M
A
N
CE CHARACTERISTICS
U
W
LT1086 Maximum Power
Dissipation*
TEMPERATURE (C)
50
OUTPUT VOLTAGE CHANGE (%)
0
1
150
LT1086 TPC04
1
2
0
50
100
2
25
25
75
125
Temperature Stability
TEMPERATURE (C)
50
0
ADJUST PIN CURRENT (
A)
10
30
40
50
100
70
0
50
75
LT1086 TPC05
20
80
90
60
25
25
100 125
150
Adjust Pin Current
LT1086 Ripple Rejection
vs Current
LT1086 Ripple Rejection
LT1086-5 Ripple Rejection
OUTPUT CURRENT (A)
0
0
RIPPLE REJECTION (dB)
20
30
40
50
60
70
0.25
0.5
0.75
1.0
LT1086 TPC08
1.25
80
90
100
10
1.5
f
R
= 120Hz
V
RIPPLE
3V
P-P
f
R
= 20kHz
V
RIPPLE
0.5V
P-P
V
OUT
= 5V
C
ADJ
= 25
F
C
OUT
= 25
F
LT1086 Short-Circuit Current
INPUT/OUTPUT DIFFERENTIAL (V)
0
0
SHORT-CIRCUIT CURRENT (A) 0.5
1.0
1.5
2.0
2.5
5
10
15
20
LT1086 TPC01
25
30
T
J
= 150
C
T
J
= 25
C
T
J
= 55
C
GUARANTEED
OUTPUT CURRENT
CASE TEMPERATURE (
C)
*AS LIMITED BY MAXIMUM JUNCTION TEMPERATURE
50
POWER (W)
15
20
130
LT1086 TPC06
10
5
0
70
90
110
150
120
60
80
100
140
LT1086MK
LT1086CK
LT1086CT
FREQUENCY (Hz)
20
RIPPLE REJECTION (dB)
40
50
60
80
100
10
30
70
90
10
1k
10k
100k
LT1086 TPC07
0
100
V
RIPPLE
3V
P-P
(V
IN
V
OUT
)
3V
(V
IN
V
OUT
)
V
DROPOUT
V
RIPPLE
0.5V
P-P
C
ADJ
= 200
F AT FREQUENCIES < 60Hz
C
ADJ
= 25
F AT FREQUENCIES > 60Hz
I
OUT
= 1.5A
FREQUENCY (Hz)
20
RIPPLE REJECTION (dB)
40
50
70
80
10
1k
10k
100k
LT1086 TPC09
0
100
60
30
10
V
RIPPLE
3V
P-P
(V
IN
V
OUT
)
3V
(V
IN
V
OUT
)
V
DROPOUT
V
RIPPLE
0.5V
P-P
I
OUT
= 1.5A
TEMPERATURE (C)
50
0.20
OUTPUT VOLTAGE DEVIATION (%) 0.15
0.10
0.05
0
0
50
100
150
LT1086 TPC02
0.05
0.10
25
25
75
125
I = 1.5A
INPUT/OUTPUT DIFFERENTIAL (V)
0
0
MINIMUM OPERATING CURRENT (mA)
1
3
4
5
10
7
10
20
25
LT1086 TPC03
2
8
9
6
5
15
30
35
T
J
= 150
C
T
J
= 25
C
T
J
= 55
C
Minimum Operating Current
(Adjustable Device)
LT1086 Load Regulation