lt1431is8-trpbf Linear Technology Corporation, lt1431is8-trpbf Datasheet

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lt1431is8-trpbf

Manufacturer Part Number
lt1431is8-trpbf
Description
Programmable Reference
Manufacturer
Linear Technology Corporation
Datasheet
FEATURES
TYPICAL APPLICATIO
APPLICATIO S
Linear Regulators
Adjustable Power Supplies
Switching Power Supplies
Guaranteed 0.4% Initial Voltage Tolerance
0.1Ω Typical Dynamic Output Impedance
Fast Turn On
Sink Current Capability, 1mA to 100mA
Low Reference Pin Current
Available in N8, S8 or 3-Lead TO-92 Z Packages
R
5V
REF
MID
R
TOP
V
+
IN
U
GND-S
REGULATOR
SWITCHING
2.5V
Isolated 5V Regulator
+
4mA/V
g
V
m
+
=
U
COMP
LT1431
+
COLL
GND-F
LT1431 • TA01
5V
DESCRIPTIO
The LT
100mA sink capability, 0.4% initial reference voltage tol-
erance 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 exter-
nal resistor.
A simplified 3-pin version, the LT1431CZ/LT1431IZ, is
available for applications as an adjustable reference and is
pin compatible with the TL431.
, LTC and LT are registered trademarks of Linear Technology Corporation.
®
1431 is an adjustable shunt voltage regulator with
Programmable Reference
2.5025
2.5000
2.4925
2.4875
2.4975
2.4950
2.4900
–50
U
–25
V
REF
0
TEMPERATURE (°C)
vs Temperature
25
50
75
LT1431 • TA01b
100
LT1431
125
1413fc
1

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lt1431is8-trpbf Summary of contents

Page 1

... The nominal internal current limit of 100mA may be decreased by including one exter- nal resistor. A simplified 3-pin version, the LT1431CZ/LT1431IZ, is available for applications as an adjustable reference and is pin compatible with the TL431. , LTC and LT are registered trademarks of Linear Technology Corporation COMP COLL LT1431 GND-F LT1431 • ...

Page 2

... LT1431C ............................................. 0°C to 100°C Storage Temperature Range ................ –65°C to 150°C Lead Temperature (Soldering, 10 sec)................ 300° ORDER PART NUMBER LT1431CN8 LT1431IN8 LT1431CS8 REF ANODE LT1431IS8 S8 PART MARKING 1431 3-LEAD TO-92 PLASTIC 1431I T = 100°C, θ J MAX LT1431MJ8 The ● denotes the specifications which apply over the full operating = 25° ...

Page 3

ELECTRICAL CHARACTERISTICS Note 1: Absolute Maximum Ratings are those values beyond which the life of a device may be impaired. Note the cathode voltage of the LT1431CZ/IZ and corresponds the LT1431CN8/IN8/CS8/IS8. I ...

Page 4

LT1431 W U TYPICAL PERFOR A CE CHARACTERISTICS Propagation Delay vs Overdrive 150 1k 5V 135 OUTPUT 3 1 120 V ± OVERDRIVE LT1431 REF 105 OUTPUT HIGH-TO-LOW 30 OUTPUT LOW-TO-HIGH ...

Page 5

CTIO S COLL (Pin 1): Open collector of the output transistor. The maximum pin voltage is 36V. The saturation voltage at 100mA is approximately 1V. COMP (Pin 2): Base of the driver for the output ...

Page 6

LT1431 U U APPLICATIO S I FOR ATIO Frequency Compensation As a shunt regulator, the LT1431 is stable for all capacitive loads on the COLL pin. Capacitive loading between 0.01µF and 18µF causes reduced phase margin with some ringing under ...

Page 7

U TYPICAL APPLICATIO ≥ 5.2V IN Measured Dropout Voltages I MTP50N05EL MTM25N05L LOAD 2A 47mV 145mV 1A 22mV 73mV 0.5A 11.5mV 37mV PNP Low Dropout 5V Regulator* 0.1µF 20Ω** 2W 1k 2N2219 0.015µF 150Ω ...

Page 8

LT1431 U TYPICAL APPLICATIO S 12V to 5V Buck Converter with Foldback Current Limit* PULSE ENGINEERING #PE-51515 OUT IN IN LT1089 HI-SIDE SWITCH MBR735 LOGIC IN GND 5k 1500pF 2 1 COMP COLL ...

Page 9

TYPICAL APPLICATIO S 5V Power Supply Monitor with ±500mV Window and 50mV Hysteresis 1k 6k* 1N4148 + + V COLL V REF LT1431 LT1431 5k GND-S GND-F GND-S 10Ω** 220µF BAT85 35V R1 470k ...

Page 10

LT1431 W W SCHE ATIC DIAGRA 35k 35k REF R6 8. TOP MID 10X GND-SENSE PACKAGE DESCRIPTIO .300 BSC CORNER ...

Page 11

... MOLD FLASH OR PROTRUSIONS SHALL NOT EXCEED .006" (0.15mm) 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 represen- tation that the interconnection of circuits as described herein will not infringe on existing patent rights. ...

Page 12

... Overshoot Control, 600mV Reference, High Bandwidth Error Amplifier www.linear.com ● .098 +.016/–.04 (2.5 +0.4/–0.1) 2 PLCS TO-92 TAPE AND REEL REFER TO TAPE AND REEL SECTION OF LTC DATA BOOK FOR ADDITIONAL INFORMATION Timing S LT/TP 1004 1K REV C • PRINTED IN USA © LINEAR TECHNOLOGY CORPORATION 1992 1413fc ...

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