LT1431CZ#TRPBF Linear Technology, LT1431CZ#TRPBF Datasheet

IC REF PROGRAMMABLE .4%TOL TO-92

LT1431CZ#TRPBF

Manufacturer Part Number
LT1431CZ#TRPBF
Description
IC REF PROGRAMMABLE .4%TOL TO-92
Manufacturer
Linear Technology
Datasheet

Specifications of LT1431CZ#TRPBF

Reference Type
Shunt, Adjustable
Voltage - Output
2.5 ~ 36 V
Tolerance
±0.4%
Temperature Coefficient
30ppm/°C
Number Of Channels
1
Current - Cathode
600µA
Current - Output
100mA
Operating Temperature
0°C ~ 70°C
Mounting Type
Through Hole
Package / Case
TO-92-3 (Standard Body), TO-226
Lead Free Status / RoHS Status
Lead free / RoHS Compliant
Voltage - Input
-
Current - Quiescent
-

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Manufacturer
Quantity
Price
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Part Number:
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L
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FeaTures
applicaTions
L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear
Technology Corporation. All other trademarks are the property of their respective owners.
Typical applicaTion
n
n
n
n
n
n
n
n
n
R
5V
REF
MID
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 J8, N8, S8 or 3-Lead TO-92 Z Packages
Linear Regulators
Adjustable Power Supplies
Switching Power Supplies
R
TOP
V
+
IN
GND-S
REGULATOR
SWITCHING
2.5V
Isolated 5V Regulator
+
4mA/V
g
V
m
+
=
COMP
LT1431
+
COLL
GND-F
LT1431 TA01
5V
DescripTion
The LT
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.
Programmable Reference
®
1431 is an adjustable shunt voltage regulator
2.5025
2.5000
2.4950
2.4925
2.4900
2.4875
2.4975
–50
–25
V
REF
0
TEMPERATURE (°C)
vs Temperature
25
50
75
100
LT1431 TA01b
125
LT1431
1431fd


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LT1431CZ#TRPBF Summary of contents

Page 1

... Available in J8, N8 3-Lead TO-92 Z Packages n applicaTions Linear Regulators n Adjustable Power Supplies n Switching Power Supplies n L, LT, LTC, LTM, Linear Technology and the Linear logo are registered trademarks of Linear Technology Corporation. All other trademarks are the property of their respective owners. Typical applicaTion Isolated 5V Regulator + SWITCHING V IN REGULATOR – ...

Page 2

... LT1431CS8#TRPBF LT1431IS8#PBF LT1431IS8#TRPBF LT1431MJ8#PBF LT1431MJ8#TRPBF LT1431CZ#PBF LT1431CZ#TRPBF LT1431IZ#PBF LT1431IZ#TRPBF 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: For more information on tape and reel specifications, go to: ...

Page 3

T SYMBOL PARAMETER V Reference Voltage REF ∆V /∆T Reference Drift REF ∆V /∆V Voltage Ratio, Reference to REF KA Cathode (Open-Loop Gain Reference Input Current REF I Minimum Operating ...

Page 4

LT1431 Typical perForMance characTerisTics 2.5V Reference 1000 900 800 700 I MIN 600 500 400 300 200 100 0 0 0.5 1.0 1.5 2.0 2.5 3.0 3.5 4.0 4.5 5.0 V (V) KA LT1431 TPC01 ...

Page 5

Typical perForMance characTerisTics Transconductance and Phase vs Frequency (Ref to Comp PHASE 0.1 100 1k 10k 100k 1M FREQUENCY (Hz) LT1431 TPC10 COMP ...

Page 6

LT1431 pin FuncTions 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 transis- tor. This pin ...

Page 7

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 transient conditions. Output capacitors should not ...

Page 8

LT1431 Typical applicaTions ≥ 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* 0.1µ 2N2219 0.015µF 150 2 ...

Page 9

Typical applicaTions 12V to 5V Buck Converter with Foldback Current Limit* PULSE ENGINEERING #PE-51515 OUT IN LT1089 HI-SIDE SWITCH MBR735 LOGIC IN GND 5k 1500pF 2 1 COMP COLL REF LT1431 4 ...

Page 10

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

Page 11

DiagraM 35k 35k REF TOP MID GND-SENSE package DescripTion .300 BSC CORNER LEADS OPTION (7.62 BSC) .023 – .045 ...

Page 12

LT1431 package DescripTion .300 – .325 (7.620 – 8.255) .065 (1.651) .008 – .015 TYP (0.203 – 0.381) +.035 .325 –.015 ( ) +0.889 8.255 –0.381 NOTE: INCHES 1. DIMENSIONS ARE MILLIMETERS *THESE DIMENSIONS DO NOT INCLUDE MOLD FLASH OR ...

Page 13

... M-Grade Parts Re-Released. Obsolete Package Shading Removed 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 representa- tion that the interconnection of its circuits as described herein will not infringe on existing patent rights. ...

Page 14

... Overshoot Control, 600mV Reference, High Bandwidth Error Amplifier www.linear.com ● Z3 (TO-92) 1008 REV C .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 0410 REV D • PRINTED IN USA  LINEAR TECHNOLOGY CORPORATION 1992 1431fd ...

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