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LT1431MPS8#PBF

P1-P3P4-P6P7-P9P10-P12P13-P14
LT1431
1
1431fe
Typical applicaTion
FeaTures DescripTion
Programmable Reference
The LT
®
1431 is an adjustable shunt voltage regulator
with 100mA sink capability, 0.4% initial reference voltage
tolerance and 0.3% typical temperature stability. On-chip
divider resistors allow the LT1431 to be configured as a
5V shunt regulator, with 1% initial voltage tolerance and
requiring no additional external components. By adding
two external resistors, the output voltage may be set to
any value between 2.5V and 36V. The nominal internal
current limit of 100mA may be decreased by including
one external resistor.
A simplified 3-pin version, the LT1431CZ/LT1431IZ, is
available for applications as an adjustable reference and
is pin compatible with the TL431.
Isolated 5V Regulator
applicaTions
n
Guaranteed 0.4% Initial Voltage Tolerance
n
0.1Ω Typical Dynamic Output Impedance
n
Fast Turn-On
n
Sink Current Capability, 1mA to 100mA
n
Low Reference Pin Current
n
Available in J8, N8, S8 or 3-Lead TO-92 Z Packages
n
Linear Regulators
n
Adjustable Power Supplies
n
Switching Power Supplies
V
REF
vs Temperature
LT1431 TA01
COLLCOMPV
+
5V
LT1431
GND-FGND-S
R
TOP
REF
R
MID
2.5V
+
–
g
m
=
4mA/V
+
SWITCHING
REGULATOR
–
V
IN
5V
+
TEMPERATURE (°C)
–50
V
REF
(V)
2.4975
2.5000
2.5025
25 75
LT1431 TA01b
2.4950
2.4925
–25 0
50 100 125
2.4900
2.4875
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks and
ThinSOT is a trademark of Linear Technology Corporation. All other trademarks are the property
of their respective owners.
LT1431
2
1431fe
absoluTe MaxiMuM raTings
V
+
, V
COLLECTOR
..........................................................36V
V
COMP
, R
TOP
, R
MID
, V
REF
.............................................6V
GND-F to GND-S ......................................................0.7V
Ambient Temperature Range
LT1431M, LT1431MP ......................... –55°C to 125°C
LT1431I ................................................ –40°C to 85°C
LT1431C .................................................. 0°C TO 70°C
(Note 1)
pin conFiguraTion
orDer inForMaTion
LEAD FREE FINISH TAPE AND REEL PART MARKING PACKAGE DESCRIPTION TEMPERATURE RANGE
LT1431CN8#PBF LT1431CN8#TRPBF LT1431 CN8 8-Lead Plastic DIP 0°C to 70°C
LT1431IN8#PBF LT1431IN8#TRPBF LT1431 IN8 8-Lead Plastic DIP –40°C to 85°C
LT1431CS8#PBF LT1431CS8#TRPBF LT1431 8-Lead Plastic SO 0°C to 70°C
LT1431IS8#PBF LT1431IS8#TRPBF LT1431I 8-Lead Plastic SO –40°C to 85°C
LT1431MPS8#PBF LT1431MPS8#TRPBF LT1431 8-Lead Plastic SO –55°C to 125°C
LT1431MJ8#PBF LT1431MJ8#TRPBF LT1431 MJ8 8-Lead CERDIP –55°C to 125°C
LT1431CZ#PBF LT1431CZ#TRPBF LT1431 CZ 3-Lead TO-92 Plastic 0°C to 70°C
LT1431IZ#PBF LT1431IZ#TRPBF LT1431 IZ 3-Lead TO-92 Plastic –40°C to 85°C
Consult LTC Marketing for parts specified with wider operating temperature ranges.
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/
Junction Temperature Range
LT1431M, LT1431MP ......................... –55°C to 150°C
LT1431I ..............................................–40°C to 100°C
LT1431C ................................................. 0°C to 100°C
Storage Temperature Range .................. –65°C to 150°C
Lead Temperature (Soldering, 10 sec) ...................300°C
1
2
3
4
8
7
6
5
TOP VIEW
COLLECTOR
COMP
V
+
R
TOP
REF
R
MID
GND-F
GND-S
J8 PACKAGE
8-LEAD CERDIP
T
JMAX
= 150°C, θ
JA
= 100°C/W
1
2
3
4
8
7
6
5
TOP VIEW
COLLECTOR
COMP
V
+
R
TOP
REF
R
MID
GND-F
GND-S
N8 PACKAGE
8-LEAD PLASTIC DIP
T
JMAX
= 100°C, θ
JA
= 130°C/W
1
2
3
4
8
7
6
5
TOP VIEW
REF
R
MID
GND-F
GND-S
COLLECTOR
COMP
V
+
R
TOP
S8 PACKAGE
8-LEAD PLASTIC SO
T
JMAX
= 100°C, θ
JA
= 170°C/W
BOTTOM VIEW
REF ANODE
CATHODE
Z PACKAGE
3-LEAD TO-92 PLASTIC
T
JMAX
= 100°C, θ
JA
= 150°C/W
LT1431
3
1431fe
elecTrical characTerisTics
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 2: V
KA
is the cathode voltage of the LT1431CZ/IZ and corresponds
to V
+
of the LT1431CN8/IN8/CS8/IS8. I
K
is the cathode current of the
The l denotes the specifications which apply over the full operating
temperature range, otherwise specifications are at T
A
= 25°C. I
K
= 10mA unless otherwise specified (Note 2)
SYMBOL PARAMETER CONDITIONS
LT1431I, LT1431M LT1431C
UNITSMIN TYP MAX MIN TYP MAX
V
REF
Reference Voltage V
KA
= 5V, I
K
= 2mA, (Note 3)
l
2.490
2.465
2.500 2.510
2.535
2.490
2.480
2.500 2.510
2.520
V
V
∆V
REF
/∆T Reference Drift V
KA
= 5V, I
K
= 2mA
l
50 30 ppm/°C
∆V
REF
/∆V
KA
Voltage Ratio, Reference to
Cathode (Open-Loop Gain)
I
K
= 2mA, V
KA
= 3V to 36V
l
0.2 0.5 0.2 0.5 mV/V
|I
REF
| Reference Input Current V
KA
= 5V, T
A
= 25°C
l
0.2 1.0
1.5
0.2 1.0
1.2
µA
µA
I
MIN
Minimum Operating Current V
KA
= V
REF
to 36V 0.6 1.0 0.6 1.0 mA
|I
OFF
| Off-State Cathode Current V
KA
= 36V, V
REF
= 0V
l
1
15
1
2
µA
µA
|I
LEAK
| Off-State Collector Leakage Current V
COLL
= 36V, V
+
= 5V, V
REF
= 2.4V
l
1
5
1
2
µA
µA
|Z
KA
| Dynamic Impedance V
KA
= V
REF
, I
K
= 1mA to 100mA, f ≤ 1kHz 0.2 0.2 Ω
I
LIM
Collector Current Limit V
KA
= V
REF
+ 50mV
l
80 360 100 260 mA
5V Reference Output Internal Divider Used, I
K
= 2mA 4.950 5.000 5.050 4.950 5.000 5.050 V
LT1431CZ/IZ and corresponds to I(V
+
) + I
COLLECTOR
of the LT1431CN8/
IN8/CS8/IS8.
Note 3: The LT1431 has bias current cancellation which is effective only
for V
KA
≥ 3V. A slight (≈2mV) shift in reference voltage occurs when
V
KA
drops below 3V. For this reason, these tests are not performed at
V
KA
= V
REF
.
P1-P3P4-P6P7-P9P10-P12P13-P14

LT1431MPS8#PBF

Mfr. #:
Buy LT1431MPS8#PBF
Manufacturer:
Analog Devices / Linear Technology
Description:
Voltage References Opto Driver
Lifecycle:
New from this manufacturer.
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